How to Use Single-Fiber CWDM MUX/DEMUX

In CWDM networks, dual-fiber CWDM MUX/DEMUX, which uses the same wavelengths for transmitting and receiving, is usually used in dual way transmission applications. The working principle is easy to understand. A duplex fiber cable links two dual-fiber CWDM MUX/DEMUXs supporting the same wavelengths installed on each end of the fiber optic network. The wavelengths of the two fibers are the same, but they are running on the different directions for duplex transmission. However, in some cases, there is only one fiber available for network capacity expansion. Then, single-fiber CWDM MUX/DEMUX is being used, which is very much different from the dual-fiber one.

Understand Single-Fiber CWDM MUX/DEMUX

The single-fiber CWDM MUX/DEMUX has a simplex line port (shown in the above picture), which is the biggest difference from the dual-fiber CWDM MUX/DEMUX on the appearance. There are also some single-fiber CWDM MUX/DEMUX are made with a duplex port. But only one port of this duplex port is in use, the other is usually marked with N/A. For instance, our FMU single-fiber CWDM MUX/DEMUX also uses this design.

 

The reason why single-fiber CWDM MUX/DEMUX can achieve dual way transmission is because it uses the CWDM wavelengths in a different way compared with the dual-fiber CWDM MUX/DEMUX. In dual-fiber CWDM network, each wavelength runs on two opposite directions. However, in single-fiber CWDM network, each wavelength just runs on one direction. In other works, if you want to build a dual way transmission link between two sites, you can use one wavelength over duplex fiber with dual-way CWDM MUX/DEMUX, or use two wavelengths (one for TX and the other for RX) over simplex fiber with single-fiber CWDM MUX/DEMUX.

 

The above picture shows how CWDM wavelengths are used in a single-fiber CWDM network. In this network, 16 wavelengths are used to support 8 pairs of dual-way transmission. On site A, there deployed an 8-channel single-fiber CWDM MUX/DEMUX using 8 wavelengths for transmitting and the other 8 wavelengths for received. On the opposite site B, also a single-fiber CWDM MUX/DEMUX is deployed. However, the wavelengths for TX and RX are reversed. For instance, a pair of dual-way signal uses 1270nm for TX and 1290nm for RX on site A, while use 1290nm for TX and 1270nm for RX on site B. This is how the single-fiber CWDM MUX/DEMUX achieving dual-way transmission.

 

How to Select Fiber Optic Transceiver for Single-Fiber CWDM MUX/DEMUX

Some might get confused about how to select the transceivers for single-fiber CWDM network as there are two different wavelengths on a duplex channel port. The selection for single-fiber CWDM MUX/DEMUX is mainly based on the wavelength for TX. Still take the above mentioned example, on site A 1270nm is used for TX, thus, a 1270nm CWDM fiber optic transceiver should be used. On site B, a 1290nm CWDM fiber optic transceiver should be used. The fiber optic transceivers used for single-fiber CWDM network are different on the two sites.

Single-Fiber CWDM MUX/DEMUX Case Study

Here offers a case of how to use single-fiber CWDM MUX/DEMUX to build CWDM network which supports four pairs of dual-way signals. To build such a single-fiber CWDM network, eight different wavelengths should be used. Here we use two of our FMU 4-channel single-fiber CWDM MUX/DEMUXs to show the details. These two single-fiber CWDM MUX/DEMUX can be used together. The following shows their channel port details.

 

The following picture shows how to build a 10G single-fiber CWDM network. As clearly showed, all the wavelengths just go in one direction. CWDM SFP+ transceivers working on 1470nm, 1510nm, 1550nm and 1590nm are linked with the CWDM MUX/DEMUX on one side of the network. The other CWDM MUX/DEMUX deployed on the other end of the network is connected with CWDM SFP+ transceiver working on wavelengths of 1490nm, 1530nm, 1570nm, 1610nm. Thus, eight wavelengths are used for 4 pair dual-way transmission in this single-fiber CWDM network.

 

fiber-mart.COM Single-Fiber CWDM Solution

The above mentioned products for CWDM network are all available in fiber-mart.COM. various CWDM MUX/DEMUXs and CWDM fiber optic transceivers including CWDM SFP/SFP+/XFP are available and can be customized. Please note the special ports like expansion port and monitor can also be added and they are all simplex. Kindly contact sales@fiber-mart.com for more details if you are interested.

How to Installing or Removing Transceiver Modules (Part I)

by Fiber-MART.COM

After learning more about a variety basic or conclusive knowledge of transceiver modules these days, I believe you must have a new understanding or a deeper perception on the transceiver modules. In fact, that's just a tip of iceberg. My blog will continue to bring more information about the fiber optic transceiver modules, such as SFP transceiver, SFP+ transceiver, XFP and so on. Also the other knowledge of fiber optic communication, network, telecom etc. to all of my friends who like this field and like my blog. Since we discuss so much about the theories of the transceiver modules, today, I prefer to talk about something practicle, for instance, some knowledge about installing or removing different kinds of transceiver modules.

 

As we know, the commonly used transceivers include the following 8 types:SFP Cisco

 

 

GBIC (Gigabit interface converter)

 

SFP (small form-factor plable)

 

SFP+

 

XENPAK

 

X2

 

XFP

 

QSFP/QSFP+ (Quad Small Form-factor Plable Plus (QSFP+) )

 

CFP (C Form-Factor Plable)

 

 

The following content will cover the knowledge of installing or removing for these types of transceiver modules, namely today's main topic. But first of all, I want to talk about some preparations and considerations before starting the main topic.

 

What equipment should we need to install a transceiver module?

 

When installing a transceiver module, some tools you should need in order to make your installation go well. The following is a list of such tools which are recommended:

 

 

 

A Wrist strap or similar personal grounding device designed to stop ESD occurrences.

 

An Antistatic mat or similar which the transceiver can be placed on.

 

Fibre-optic end-face cleaning tools and inspection equipment.

 

A flat head screw driver is require to install a XENPAK transceiver module.

 

 

What should we need to know before or during installing or removing a transceiver module?

 

In order to ensure the safety and avoid leading the unnecessary losses, there are some items which we should consider before and during installing and removing the transceiver modules.

 

 

To preventing the cables, connectors, and the optical interfaces from damage. We must disconnect all cables before removing or installing a transceiver module.

 

Please be aware that the regular removal and installation a transceiver module can shorten its useful life. Thus, transceivers should not be removed or inserted more often than is required.

 

Transceiver modules are sensitive to static, so always ensure that you use an ESD wrist strap or comparable grounding device during both installation and removal.

 

Do not remove the dust plug from the transceiver slot if you are not installing the transceiver at this time. Similarly, we must use the dust plug to protect the optical bore if we don’t use the transceivers.

 

 

How to Install or Remove Transceiver Modules

 

1. How to Install or Remove GBIC Transceiver Module

 

GBIC Installing Steps

 

 

step 1: Firstly you should attach your ESD preventive wrist strap to your wrist to prevent ESD occurrences.

 

step 2: Remove the GBIC transceiver from its protective packaging.

 

step 3: Verify that the GBIC transceiver module is the correct model for the intended network.

 

step 4: Using your thumb and forefinger, grip the sides of the GBIC transceiver and carefully align it with the GBIC socket opening on the device.

 

step 5: You can now carefully insert the GBIC transceiver module through the socket flap and slide it into the GBIC socket. A click will be heard once the GBIC is locked into the socket. Please ensure that the GBIC is inserted carefully straight into the socket.

 

(Please note: you should keep the protective dust plugs in place until making a connection. You should also inspect and clean the SC connector end faces immediately prior to making a connection.)

 

 

step 6: The dust plugs from the network interface cable SC connectors can now be removed, ensuring that these are saved for later use.

 

step 7: Next, inspect and clean the SC connector’s fiber optic end faces.

 

step 8: Remove the dust plugs from the optical bores on the GBIC transceiver module.

 

step 9: You can now attach the network interface cable SC connector to the GBIC.

 

GBIC Removing Steps

 

Please be aware that GBIC transceiver modules are static sensitive so you should always use an ESD wrist strap or similar grounding device when coming into contact with the device. Transceiver modules can also reach high temperatures so may be too hot to be removed with bare hands.

 

step 1: Disconnect the cable from the GBIC connector.

 

step 2: Release the GBIC from the slot by pressing the two plastic tabs located on either side of the GBIC (They must be pressed at the same time).

 

step 3: Once released carefully slide the GBIC straight out of its module slot.

 

step 4: The GBIC transceiver module should now be placed safely into an antistatic bag.

 

Why Do We Need Different Categories of Cables?

by Fiber-MART.COM

Though fiber optic cabling is in full swing in recent years, it still can not take the place of the copper cabling completely. As one type of the copper cabling, Unshielded Twisted Pair (UTP) cable is most certainly by far the most popular cable around the world. Because UTP cables are used not only for networking but also for the in television, video, and telephone applications. When we talking UTP cables, we’ll likely come across Cat 5, Cat 5e, and Cat 6 cables with no clue as to what these designations mean. Why are they called as Cat with a number? Are these cables the tails of felines, and the number denotes how many of their nine lives remain? Of course, it is just a joke for the outsider. Cat here is short for “category”, and the number, such as 3, 5, 5e, 6 etc., refers to the generation of twisted pair Ethernet technology. Though it is said that the Cat 5 cable is the most popular of all UTP cables in use today, many new generation of UTP cables still come to the market. This cause us to think why we need different categories of cables?

 

From the above table, we can easily find that except Cat 1, the other categories of cables are designed for computer networking. For instance, Cat 2 is used mostly for token ring networks, supporting speeds up to 4 Mbps. For higher network speeds you must use Cat 4 or Cat 5 cable, but for 10 Mbps Cat 3 will suffice.

 

Actually, Cat 3, Cat 4 and Cat 5 cable are 4 pairs of twisted copper cables and Cat 5 has more twists per inch than Cat 3 therefore can run at higher speeds and greater lengths. The “twist” effect of each pair in the cables will cause any interference presented/picked up on one cable to be cancelled out by the cable’s partner which twists around the initial cable.

 

From Cat 5 cable, UTP cables began to be used in Ethernet application. And Cat 6 cable was originally designed to support gigabit Ethernet, although there are standards that will allow gigabit transmission over Cat 5 cable (here refers to Cat 5e). Though a Cat 5e cable infrastructure will safely accommodate the widely used 10 and 100 Mbps Ethernet protocols, 10BASE-T and 100BASE-T respectively, it may not satisfy the needs of the next Ethernet protocol, gigabit Ethernet (1000BASE-TX). Thus, Cat 6 Cable was developed to ensure 1000BASE-T performance as well as accommodate other protocols.

 

As for the 10 Gigabit Ethernet, Cat 7 cable came to the market. Cat 7 network cabling is used as a cabling infrastructure for 1000BASE-T (Gigabit Ethernet) and 10GBASE-T (10-Gigabit Ethernet) networks. Cat 7a is the enhanced version of Cat 7. It can perform up to frequencies of 1000 MHz and 40 Gbps.

 

Obviously, though fiber optic cable seems like the trend of future cabling, the development of copper cabling do not mean to stop. After seven generation of evolutions, Cat 8 cable was launched to the market in order to satisfy the 40G Ethernet (40GBASE-T). Cat 8 cable will contain four shielded twisted pairs and have a diameter about the same as Cat 6a and Cat 7a cables, but the bandwidth is specified to 2 GHz.

 

If you have read this far, you may clearly know why we need so many categories of cables. Of course, this does not mean that you should buy all of these cables home or you should use copper cabling instead of fiber optic cabling. Different categories of cables are with different characteristics and used for different applications. And copper cabling sometimes seems to be better than fiber optic cabling in short distance. You should choose the right cable according to your application and working environment.

 

fiber-mart is a professional manufacturer and supplier for network solutions, including fiber optic subsystems, components and copper network components. You could find all kinds of UTP cables or fiber optic patch cables, as well as a comprehensive solution of transceiver modules for different Ethernet protocols, such as 1000BASE-T SFP, 1000BASE-SX SFP, etc. For more information, please contact us directly by sending E-mail to sales@fiber-mart.com.

 

What Cabling Infrastructure Can Support 40G Data Center?

by Fiber-MART.COM

Fiber connectivity in higher-speed active equipment tends to develop as more condensed and simplified with plug-and-play, hot-swap transceiver miniaturization. 1G and 10G networks commonly use SFP or SFP+(Small-form-factor pluggable plus). Interfaces of 40G is QSFP (Quad Small Form-factor Pluggable). The interface changes need different connectors to achieve network connectivity. So what cabling infrastructure requirements are needed to support 40G applications?

 

MPO/MTP Fiber Patch Cable

The IEEE 802.3ba standard specifies multi-fiber push-on (MPO) connectors for standard-length multimode fiber connectivity. MPO/MTP is the designated interface for multimode 40G. Its small, high-density form factor is ideal with higher-speed Ethernet equipment.

 

A 12-fiber MPO connector interface can accommodate 40G. Usually 40G data center uses 12-fiber MPO/MTP connectors. The typical implementations of MPO plug-and-play systems split a 12-fiber trunk into six channels that run up to 10 Gigabit Ethernet (depending on the length of the cable). 40G system uses 12-fiber trunk to create a Tx/Rx link, dedicating 4 fibers for 10G each of upstream transmit, and 4 fibers for 10G each of downstream receive. The upgrade path for this type of system entails simply replacing the cassette with an MPO-to-MPO adapter module.

 

Direct Attach Cable

Except MPO/MTP trunk or patch cord assemblies interconnecting QSFP+ transceivers, many data centers also likely to use 40G DACs (direct attach cable). DAC is a form of high speed cable with “transceivers” on either end used to connect switches to routers or servers. It a kind of optical transceiver assembly. DAC cables are not real optics and their components are without optical lasers. DACs are much cheaper than the regular optics. Just because the low cost and high performance, DACs are preferable for 40G data center applications and high-performance computing environments. Cost of connectivity is significantly reduced by avoiding the more costly fiber transceivers and optical cables. 40G DACs can provide inexpensive and reliable 40G speed connections using either active optical cables or copper cables.

 

Active Optical Cable

An active optical cable (AOC) consists of a bend-insensitive multimode or single-mode fiber cable terminated with a connector and embedded with transceivers that convert electrical signal to optical signal and back. AOC can reach a longer distance copper cables. AOCs use the same interfaces as copper cables and are typically used in data centers.

 

In data centers, people worry that power consumption and heat generation will increase with the high data rates. Last few years, cable assembly manufacturers have responded by releasing increasingly efficient AOC interconnects. For example, 3M makes a QSFP+ AOC assembly that uses approximately 475mW per end. In addition to lowering power consumption directly, low-power AOCs release less heat than higher-powered products, further driving down power consumption by reducing the need for cooling.

 

What’s more, AOC is reliable. Nowadays, consumers are less tolerant of errors and failure, so the reliability of all equipment becomes more critical. The tiny electronics embedded in the transceiver, which enable the electrical-optical-electrical conversion, carry a potential for failure. So cable installers are wise to choose AOC with test results confirming its reliability.

 

The problem is that copper cable is stiff and bulky, thus consuming precious rack space and blocking critical airflow. But with the advancing technology, manufactures produce a thinner, uniquely shielded ribbon-style twinaxial cable that can support speeds of 10G per channel while addressing many of the concerns associated with round, bundled cable. And the ribbon-style twinaxial cable is significantly slimmer than its round counterparts. Even better, the cable can be folded multiple times and still maintain signal integrity, allowing for higher density racks and space savings.

 

Conclusion

As the need of high data transport rates, the data center network migrates from 10G to 40 Gigabit Ethernet which provides a framework for data rates of 40 Gigabit per second. To support 40 Gpbs connectivity, there is a need to upgrade the cabling infrastructure. All our MPO/MTP fiber cables and 40G QSFP+ cables are low-cost and high-performing. Fiberstore can provide you a suitable way to achieve your 40G data rates in the most cost-effective manner.

Multimode Fiber Optic Cable

Today, multimode fiber optic systems are lagging behind singlemode systems in terms of growth. In addition to supporting high data throughput, singlemode systems are attractive because they are easy to upgrade and help to "future proof" installations.  Nonetheless, multimode fiber still gets plenty of coverage in any fiber optic cable guide.  Why? Because multimode is still the fiber of choice for many applications.

 

For example, multimode fiber optic cable is well suited for systems that have short fiber optic links, such as Local Area Networks (LANs) and Storage Area Networks (SANs).

 

Multimode Advantages

Multimode fiber optic cable and components are less expensive and easier to work with than their singlemode counterparts. This is due largely to the fact that the multimode fiber core is larger, and alignment tolerances are much less critical than they are for singlemode fiber. 

 

Like singlemode, multimode fiber provides high bandwidth at high speeds, but transmission is limited to shorter distances than singlemode. (In longer cable runs, the multiple paths of light in a multimode fiber tend to create signal distortion).

 

Standard multimode cable is made of glass fibers, usually 50-to-100 micron in diameter (most common is 62.5).  Multimode cable is also available as low-cost Plastic Optical Fiber (POF), which offers performance similar to glass cable for very short runs.

 

Singlemode Advantages

Generally, singlemode cable provides less signal attenuation, higher transmissions speeds, and up to 50 times greater transmission distance than multimode cable.  Singlemode cable can transmit data at terabits per second over 100km without requiring re-amplification of the signal.

 

Singlemode fiber typically has a diameter of only 8.3 to 10 microns, which is much narrower than multimode fiber which is usually 50 to 100 microns in diameter. The small core of a singlemode fiber allows for the propagation of only one light wave, so there is no possibility of distortion due to overlapping light pulses. Also, singlemode is more stable than multimode for systems that have branching devices, such as couplers.

 

Which to Choose?

When deciding whether to use multimode or singlemode fiber, a lot depends on a system's current and future bandwidth requirements. As a general guide, think of multimode bit rate as being limited to 100Mbps over distances up to 40km, with shorter links allowing for bit rates up to 10Gbps.

 

If your system is comprised of relatively short fiber links and bandwidth requirements are not expected to exceed multimode capacity over the system's lifetime, then multimode may be the logical choice. It is less expensive to purchase, install and maintain.

FIBER-MART(Fiber-MART.COM), based in HongKong & U.S., a worldwide leading supplier in fiber optic network, fttx, fiber cabling & connectivity, fiber testing, fiber splicing, fiber polishing & integrated network solutions. Devoting on the research & development, design, manufacture, and fiber connectivity network solutions for carriers, ISPs, content providers and networks, has always engaged in high-performance and innovation.

What do Cat5e, Cat6, and Cat6a have in common?

They each utilize 4 twisted pairs in a common jacket. They use the same style RJ-45 jacks and plugs. And, they are each limited to a cable length of 100 meters including the length of the patch cables on either end of the link. The parts are interchangeable, so you can use a Cat5e patch cable with Cat6 house cabling. Your system will just perform at the level of the lowest link, in this case the Cat5e patch cable.

 

So what’s the difference?

 

Better transmission performance. With each upgrade in cable, there is less signal loss, less cross talk, and more bandwidth. And of course, more cost. So the important question is: What exactly am I getting for my money? Rather than talk about near-end-cross-talk requirements or SNR ratios, let’s talk about what each cable delivers in terms of Ethernet performance.

 

Cat5e:   Gigabit Ethernet up to 100 meters   10 Gigabit Ethernet up to 45 meters

 

Cat6:    Gigabit Ethernet up to 100 meters   10 Gigabit Ethernet up to 55 meters

 

Cat6a:   Gigabit Ethernet up to 100 meters 10 Gigabit Ethernet up to 100 meters

 

All three support gigabit, which is enough for most networks. 10 Gigabit, when it is deployed, is typically utilized for aggregation links between switches and not for workstations. Although it is unlikely an enterprise will require 10 gigabit to the workstations, certainly it is reasonable to design a new system with future needs in mind. In this case, the 10 gigabit capacities of Cat5e and Cat6 are problematic. Since data closets are located based on an assumption that workstation lines can be up to 100 meters, the shorter length limitation for Cat5e and Cat6 make them undesirable. That leaves Cat6a as the cabling of choice for future proofing.

Economically Increase Network Capacity With CWDM Mux/DeMux

As the demands for voice, video and data networks are increasing dramatically, more bandwidth and higher transmission speed over long distances are needed. To meet these demands, it means that service providers should depend on more fiber optics which definitely cause more costs for optical devices. But they apply Wavelength Division Multiplexing (WDM) technologies which is a cost-effective way to increase capacity on the existing fiber infrastructure.

 

CWDM Technology

WDM technology multiplexes multiple optical signals onto a single fiber by suing different wavelengths, or colors, of light. WDM can expand the network capacity using existing fiber infrastructure in an economical way. It includes CWDM (Coarse Wavelength Division Multiplexing) and DWDM (Dense Wavelength Division Multiplexing).

 

CWDM is a technology multiplexing 16 channels onto one single fiber between the wavelengths from 1270 nm to 1610 nm. It’s designed for city and access network. Since the channel spacing is 20 nm, CWDM is a more cost-effective method to maximize existing fiber by decreasing the channel spacing between wavelengths. CWDM is a passive technology, therefore, CWDM equipment needs no electrical power.

 

CWDM Mux/DeMux

CWDM technology has been applied into wide areas, such as CWDM optical transceivers, CWDM OADM and CWDM Mux/DeMux. CWDM Mux/DeMux modules are multiplexers and demultiplexers which provide long distance coverage with premium optical technology to enhance fiber optic systems. It multiplexes signals of different wavelengths on one single fiber and demultiplexes wavelengths to individual fibers. CWDM Mux/DeMux can offer low-cost bandwidth and upgrade the existing system without leading spare costs on more fibers. CWDM Mux/DeMux can hold up to 18 channels of different standards (for example, Fibre Channel, Gigabit Ethernet) and data rates over one fiber optic link without interruption. fiber-mart.COM offers a full series of CWDM Mux/DeMux, including 2, 4, 8, 9, 12, 16, 18 channels with or without monitor port and expansion port in 1RU 19” rack chassis or pigtailed ABS module. The following will show you how to use a 18-channel CWDM Mux/DeMux to increase the data rates up to 180 Gbps on a fiber pair.

 

In Figure2, all Cisco compatible 10G CWDM SFP+ 1270-1610 nm 40km DOM transceivers on the switch are connected with the CWDM Mux/DeMux by LC-LC fiber patch cords. This CWDM Mux/DeMux has 18 channels and is designed as 1 RU rack mount size, covering the wavelengths from 1270 nm to 1610 nm and supporting LC UPC port. During the long distance transmission, only one single-mode armored LC fiber patch cord is needed to achieve 180 Gbps by connecting the two 18-channel CWDM Mux/DeMux. Thus, it greatly saves the cost for increasing the bandwidth on the existing fiber infrastructure.

 

 

FMU CWDM Mux/Demux

To increase the capacity, it requires more space and cable management is also a big trouble. So Fiberstore independently researched and developed FMU CWDM Mux/DeMux to solve this problem. We provide FMU 16-ch 1U Rack CWDM MUX/DEMUX specially designed as 2-slot plug and play style, which allows you to add or remove fiber fiber optic cables and plug-in-modules freely according to your applications. There are two separate CWDM plug-in modules. One is high band (1470nm-1610nm) module with an expansion port and the other is low band (1270nm-1450nm, skip 1390nm, 1410nm) module without expansion port. Via this expansion port, channels can be expanded over one pair of fiber without interruption. You can also insert two CWDM Mux/DeMux FMU-plug-in modules without expansion port for two separated 8-channel connections. Besides, you can mix CWDM and DWDM system by adding CWDM Mux/DeMux FMU-plug-in modules and DWDM Mux/DeMux FMU-plug-in modules with matching wavelengths.

 

fiber-mart.COM FMU Plug-in Modules

The table below lists both single fiber and dual fiber FMU plu-in modules for 2-slot CWDM Mux/DeMux. You can choose suitable modules according to you specific requirements. Custom service is available, too.

COMMON USES FOR FIBER OPTIC CABLES

Fiber optic cables have been around for years now, but over the last decade or two, companies have come up with all sorts of ways to put them to good use. Fiber optic cables contain a few thousand optical fibers inside of them, and they are used to transmit data by utilizing light. They have changed the way that information is sent all over the world, and in the coming years, they are going to be used even more than they already are today. Let’s take a look at some of the most common uses for fibers optic cables.

 

Internet

 

Because fiber optic cables are able to take incredibly large amounts of data and move them quickly, they are primarily used by those who use the internet. Data used to be moved around through the use of copper wires, but those wires weren’t equipped to move the data as quickly as fiber optic cables can do it. So there are more and more places that are turning to fiber optic cables for their internet needs.

 

Telephone

 

People from all over the globe have always been able to keep in touch by using the telephone, but they’ve never been able to do it as easily as they can do it today through the use of fiber optic cables. You can connect with anyone in the world faster when you rely on fiber optic cables, and you can have an entire conversation with someone without experiencing any lag or disruptions.

 

Automobiles

 

While most people think that fiber optic cables are only used for communications, there are lots of other practical uses for it as well. Those in the automotive industry rely on fiber optic cables when installing lighting and safety features in many of today’s cars. Fiber optics can provide excellent lighting without taking up much space, and they can also transmit information within the various systems located in vehicles quickly and effortlessly. It’s why so many car companies are starting to find interesting new ways to use fiber optic cables.

 

As time goes on, fiber optic cables are going to become more and more a part of all of our lives. There are so many ways to use fiber optic cables, and companies are going to start using them for different tasks than they do now. Connected Fiber has more than two decades worth of experience with fiber optic cables and recognizes just how valuable they can be. We can help you with all of your fiber optic needs and tell you more about the role they play in the world. 

Advice for Cable Manufacturers Looking to Enter the US Fiber Optic Market

I’m seeing a trend in the fiber optic industry: Cable manufacturers around the world are looking to develop and qualify cable designs in order to enter the US fiber optic market. Unfortunately, I’m witnessing another trend: Many cable manufacturers don’t do enough research prior to designing their products to meet US qualifications. At the testing stage, they encounter disappointing failures. They must step back to redesign and retool. This costs time – and tens of thousands of dollars.

 

There are many differences from cable manufacturers’ home markets or even moving from Datacom to telecom type cables and testing. When consulting with manufacturers, I can provide help in understanding not only what is required, but how to actually interpret what is required. This includes guiding them past the many potential pitfalls to develop, test, and successfully qualify their fiber optic cables for the American market.

 

If your company is looking to enter the US fiber optic market, I encourage you to keep reading. There are 5 important steps you’ll need to master to successfully develop and qualify a fiber optic cable for the US marketplace and those can be found in the full blog article here: http://www.fiber-mart.com/news.html

SC to SC multimode simplex fiber optic patch cable

We are fiber optic patch cord company, Fiber optic patch cord is one of most commonly used components in fiber optic network, SC to SC multimode simplex fiber optic patch cableis widely applied in Telecommunication Networks ,Gigabit Ethernet and Premise Installations .

SC to SC multimode simplex fiber optic patch cables is with SC connector, The SC connector is with a locking tab on the cable termination, it is a push and pulls type fiber optic connector. It features low cost, simplicity, and high durability.SC fiber optic patch cord has an advantage in keyed duplexibility to support send/receive channels. We are SC multimode simplex patch cord company and manufacturer; we offer fast delivery and custom made service. We are fiber optic patch cord supplier; we offer fast delivery for SC multimode simplex patch cord.

SC to SC multimode simplex fiber optic patch cord Ordering information:

Termination connectors: FC, SC, MU, LC, ST, D4, DIN, E2000 MT-RJ, MPO, SMA

Ferrule Interface type: PC, UPC, and APC

Fiber diameter (mm): Φ 0.9, φ 2.0, Φ 3.0

Fiber cores: duplex fiber core, Simplex fiber core

Fiber type: multimode (50/125)/ (62.5/125), Single mode (G. 652, G655)

Cable length: can be customized

MU to MU Duplex 9/125 Single-mode Fiber Patch Cable 15 meters

MU-MU Duplex 9/125 Single-mode Fiber Patch Cable 15 meters

Fiber Patch Cord (Fiber Patch Cable or Fiber jumper) is an fiber cable that has fiber connectors installed on one or both ends. General use of these cable assemblies includes the interconnection of fiber cable systems and optics-to-electronic equipment. If the fiber connectors are attached to only one end of a cable, it is known as a fiber pigtail, if the fiber connectors are attached to both ends. it is known as a fiber jumper or fiber patch cord. There are various kinds of Fiber cable material for different environment and applications, PVC, Riser, Plenum, OFNR, OFNP, LSZH, 10 Gig Aqua. Typical Fiber cable diameter can be 0.25mm, 0.9mm, 2.0mm, 3.0mm. 

The Definition of ‘mode’ as in multimode refers to the transmitting mode of the fiber optic light in the fiber optic cable core. 

Singlemode fiber optic patch cables send one light signal at a time, and can be used for longer runs than multimode because they have more resistance to attenuation. 

The core of a single mode fiber optic cable is 9/125μ (micron). 

Single mode fiber optic patch cables can support gigabit ethernet applications for up to 10 kilometers.

Key Features a variety of custom Simplex, Duplex and Mini Zip, single mode (SM) and multi mode (MM) Fiber Patch Cords and Fiber pigtail assemblies with various types of Fiber Connectors including ST, FC, SC, LC, MU, MTRJ, E2000 …etc.,. that could be built to your specification. Our Fiber Patch Cord and Fiber Pigtail range offers choices of any length, connector types and either PVC or LSZH sheath, All of our cable assemblies are composed of our top quality Ceramic Ferrules and Fiber Connectors housings ensuring a stable performance at a high quality level.

MU-MU ConnectorsSingle-mode duplex fiber optic cable Complete with orange OFNR rated riser/jacket All of our fiber optic patch cables feature the high degree connectors 100% optically tested to ensure high performance

Specifications

Connectors: MU to MU Micron: 9/125um Insertion Loss: Single-mode UPC <0.2dB Return Loss: Single-mode UPC >50 dB Operating Temperature: -40℃ to 80℃ Fiber Patch cord assemblies consist of optical fiber terminated with various types of Fiber Connectors, such as the ST, FC, SC, LC, MU, MTRJ, E2000 Connector types. Our polishing process can ensure certain optical properties with a low insertion loss and return loss. We supply high quality fiber optic pigtails, patch cords and pre-assembled installation cable (indoor / outdoor / breakout cable) for singlemode and multimode applications (SM and MM). This find optical connectors, and fiber / cable from the leading manufacturers of their application. The offer includes a wide variety of connector types, cable types and cable lengths Length: 15 meter Color: Yellow

The CWDM 2.5G SFP optical module saves the shortage of fiber resource

The CWDM 2.5G SFP gigabit optical module products are developed by the CWDM technology. The CWDM technology separates the wavelength into 20nm per interval.

 

The CWDM 2.5G SFP gigabit optical module is able to improve the communication capacity, extend the broadband and solve the shortage of fiber resource efficiently in the existing network of the metropolitan area network.

The CWDM 2.5G SFP gigabit optical module provides a kind of easy, flexible and low cost solution to the metropolitan area network.

 

We also supply the OC48 SFP modules and WDM OC48 SFP modules. The price is reasonable and the quality is excellent. They are compatible with the famous brands’ devices, such as Cisco switches, H3C switches and so on.

100G QSFP28 With MTP/MPO Interface and Duplex LC Interface

100G transceiver market has been dominated by QSFP28 modules due to the low cost and small form factor. Similar to QSFP+, 100G QSFP28 transceivers can transmit optical signals through MTP/MPO patch cable and duplex LC patch cable. To make sure the cabling connection right, it’s necessary to know clearly about 100G QSFP28 interfaces. This article is gonna introduce 100G QSFP28 with MPO Interface and duplex LC Interface in details.

Currently, 100G QSFP28 specifications like 100GBASE-SR4, 100GBASE-PSM4, 100GBASE-CWDM4 and 100GBASE-LR4 are very common in the market. Each 100G QSFP28 transceiver has its own features. The following table shows basic information of four 100G QSFP28 transceivers. Two transceivers are configured with MTP/MPO interface and the other two are configured with LC duplex interface.

 

From the above table, we can see that 100GBASE-SR4 QSFP28 and 100GBASE-PSM4 QSFP28 modules have MTP/MPO interface. This kind of QSFP28 module offers 4 independent full-duplex transmit and receiver channels, each capable of running up to 28Gpbs data rate per channel. 100GBASE-SR4 QSFP28 complies with QSFP28 MSA and IEEE 802.3bm specifications. The 100G-PSM4 specification defines requirements for a point-to-point 100 Gbps link over eight single-mode fibers. Four identical and independent lanes are used for each signal direction.

 

MTP/MPO fiber cable is designed for 40G/100G high density data center cabling system. This cable is commonly used to connect QSFP+ or QSFP28 transceivers with MTP/MPO interface. MTP/MPO fiber cables are terminated with 12-fiber of 24-fiber MTP/MPO connectors. Both single-mode and multimode categories are available. Single-mode cable is able to carry signal over long distance while multimode MTP/MPO is for short link length.

 

Since 100GBASE-SR4 QSFP28 works over 8 fibers (four transmit and four receive), it should be connected with a 12-fiber MTP/MPO patch cable (four not used). Besides, “SR” standing for short rang, it means fiber cables for 100GBASE-SR4 QSFP28 should be multimode. Similar to 100GBASE-SR4 QSFP28, 100GBASE-PSM4 QSFP28 also requires 12-fiber MTP/MPO patch cable. But the difference is that this transceiver supports long distance data transmission. So it matches with single-mode MTP/MPO fiber patch cable to reach the distance up to 500 meters.

 

100G QSFP28 With Duplex LC Interface

 

100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 are configured with duplex LC interface. 100GGBASE-CWDM4 QSFP28 is a full duplex module that complies with the requirement of CWDM4 MSA. It integrates transmit and receive path in one module. On the transmit side, 4 lanes of optical signals (25.78125Gbps per lane) are multiplexed into an LC connector. And on the receive side, four lanes of optical data streams are de-multiplexed by an integrated optical de-multiplexer and transformed to an electrical CAUI-4 output driver. 100GGBASE-LR4 QSFP28 is a fully 4x25Gbps transceiver module that can support link lengths up to 10 km. 100GBASE-LR4 QSFP28 also operates over single-mode fiber cable with duplex LC connector by multiplexing and de-multiplexing optical signals.

 

100G-CWDM4-QSFP28

 

Cable Solution for Duplex LC QSFP28

 

As well known, 1G SFP and 10G SFP+ transceiver modules generally have duplex LC interfaces. One problem that we often meet when upgrading network is to replace all the fiber patch cables. But you don’t have to worry about this issue if your transceivers are 100GBASE-CWDM4 QSFP28 and 100GBASE-LR4 QSFP28 which are duplex modules and can support 2km and 10 km link length. Common single-mode duplex LC patch cable can meet the cabling requirement of these two transceivers. For high density data center, HD LC fiber patch cable is highly recommended as the “push-pull” tab is easy to remove and can save space.

 

Conclusion

 

100G QSFP28 modules are designed for high port density with small compact size and low power consumption. From this article, the interface of 100G QSFP28 transceivers includes MTP/MPO and duplex LC type. The module with MTP/MPO interface can reach 500m connection and the one with duplex LC interface can realize the connection of up to 10 km. Remember this point and you will never feel confused about these 100G QSFP28 transceivers. If you intend to upgrade your network, you can choose 100GBASE QSFP28 from our site or contact us via sales@fiber-mart.com.

fiber-mart.com supply full series of SFP fiber optic module

We have many different types of SFP fiber optic transceivers. Users are able to select appropriate transceiver to provide the “optical performance” which the available fiber (such as multi-mode fiber or single mode fiber) for each link can achieve.

The available optical sfp module generally can be divided into 850nm 550m MMF (SX) optical module, 1310nm 10km SMF (LX) optical module, 1550nm 40km XD optical module, 80km ZX optical module, 120kn EX/EZX optical module and DWDM SFP module as well as CWDM SFP module and BIDI (1310nm/1490nm uplink/downlink wavelength) SFP module.

 

Our SFP fiber optic transceiver also provides copper interface for the host equipment, which is mainly designed for the fiber optical communication, to communicate through UTP network cable.

 

The market forecast of the active optical cable (AOC)

The active optical cable (AOC) market has experienced many challenges, from the Integrate acquisitions, to the entrance of the Asia suppliers which provide low-cost price, the Japanese earthquake and tsunami and the influx of the Taiwan manufacturers and finally to the intellectual property battle between established suppliers.

By 2012, the market restored the stability and is expected to achieve sustained strong growth in 2013.

 

At present, InfiniBand market occupies the largest market share and has been transferred to 14G FDR QSFP+. While the traditional data center still remains in the 10G QSFP+ format. The active optical cable (AOC) also has potential development opportunities in other protocol, such as SAS, Fibre Channel and PCI Express and other protocol whose transmission data rate is over 10G.

 

As a professional fiber optic products manufacturer and supplier, we offer 40G QSFP+ modules, 40G QSFP+ cables and other products, such as 10G SFP+ Modules, XFP Transceivers and so on. For more information, please contact our customer services.

10GSFP-AOC-5

SFP+ AOC (Active Optical Cable) assemblies use active circuits to support longer distances than standard passive or Active SFP+ Copper Cables. They are designed for high speed, short range data link via optical fiber wire. SFP+ AOC cables provide high performance Enhanced Small Form Factor Pluggable (SFP+) interface and is a cost effective solution for Data Center/storage and all short range data application.
All our SFP+ cables are 100% compatible with major brands like Cisco, Juniper, Enterasys, Extreme, H3C and so on. If you would like to order high quality compatible SFP+ cables and get worldwide delivery, we believe Fiber-mart.COM is your best choice.

Specifications

• 10Gb/s serial optical interface
• Length: 5 meters
• Wire AWG: Fiber
• Connector 1 : SFP+ AOC
• Connector 2 : SFP+ AOC
• Low cost alternative to fiber optic assemblies
• Low power consumption
• Bend insensitive fiber
• Single 3.3V power supply
• RoHS-6 compliant
• Mechanical specifications compliant with SFF-8432
• Electrical specifications compliant with SFF-8431
• Operating Temperature: 0-70℃
• Support digital diagnostics monitoring for module temperature, Vcc, Rx input power, Tx_Disable and Rx_LOS
• Hot pluggable
• 12C communication bus

 

What's the best way to terminate fiber optic cable?

What's the best way to terminate fiber optic cable? That depends on the application, cost considerations and your own personal preferences. The following connector comparisons can make the decision easier.

Epoxy & Polish

Epoxy & polish style connectors were the original fiber optic connectors. They still represent the largest segment of connectors, in both quantity used and variety available. Practically every style of connector is available including ST, SC, FC, LC, D4, SMA, MU, and MTRJ. Advantages include:

• Very robust. This connector style is based on tried and true technology, and can withstand the greatest environmental and mechanical stress when compared to the other connector technologies.

• This style of connector accepts the widest assortment of cable jacket diameters. Most connectors of this group have versions to fit onto 900um buffered fiber, and up to 3.0mm jacketed fiber.

• Versions are. available that hold from 1 to 24 fibers in a single connector.

Installation Time: There is an initial setup time for the field technician who must prepare a workstation with polishing equipment and an epoxy-curing oven. The termination time for one connector is about 25 minutes due to the time needed to heat cure the epoxy. Average time per connector in a large batch can be as low as 5 or 6 minutes. Faster curing epoxies such as anaerobic epoxy can reduce the installation time, but fast cure epoxies are not suitable for all connectors.

Skill Level: These connectors, while not difficult to install, do require the most supervised skills training, especially for polishing. They are best suited for the high-volume installer or assembly house with a trained and stable work force.

Costs: Least expensive connectors to purchase, in many cases being 30 to 50 percent cheaper than other termination style connectors. However, factor in the cost of epoxy curing and ferrule polishing equipment, and their associated consumables.

Pre-Loaded Epoxy or No-Epoxy & Polish

There are two main categories of no-epoxy & polish connectors. The first are connectors that are pre-loaded with a measured amount of epoxy. These connectors reduce the skill level needed to install a connector but they don't significantly reduce the time or equipment need-ed. The second category of connectors uses no epoxy at all. Usually they use an internal crimp mechanism to stabilize the fiber. These connectors reduce both the skill level needed and installation time. ST, SC, and FC connector styles are available. Advantages include:

• Epoxy injection is not required.
• No scraped connectors due to epoxy over-fill.
• Reduced equipment requirements for some versions.

Installation Time: Both versions have short setup time, with pre-loaded epoxy connectors having a slightly longer setup. Due to curing time, the pre-loaded epoxy connectors require the same amount of installation time as standard connectors, 25 minutes for 1 connector, 5-6 minutes average for a batch. Connectors that use the internal crimp method install in 2 minutes or less.

Skill Level: Skill requirements are reduced because the crimp mechanism is easier to master than using epoxy. They provide maximum flexibility with one technology and a balance between skill and cost.

Costs: Moderately more expensive to purchase than a standard connector. Equipment cost is equal to or less than that of standard con¬nectors. Consumable cost is reduced to polish film and cleaning sup-plies. Cost benefits derive from reduced training requirements and fast installation time.

No-Epoxy & No-Polish

Easiest and fastest connectors to install; well suited for contractors who cannot cost-justify the training and supervision required for standard connectors. Good solution for fast field restorations. ST, SC, FC, LC, and MTRJ connector styles are available. Advantages include:
• No setup time required.
• Lowest installation time per connector.
• Limited training required.
• Little or no consumables costs.

Installation Time: Almost zero. Its less than 1 minute regardless of number of connectors.

Skill level: Requires minimal training, making this type of connector ideal for installation companies with a high turnover rate of installers and/or that do limited amounts of optical-fiber terminations.

Costs: Generally the most expensive style connector to purchase, since some of the labor (polishing) is done in the factory. Also, one or two fairly expensive installation tools may be required. However, it may still be less expensive on a cost-per-installed-connector basis due to lower labor cost.