Why You Need Low-Loss Fiber Connectivity

by Fiber-MART.COM

In any data center, the key for each manager is to maintain efficiency and set your network up for optimal connectivity. However, things do not always go to plan every single day, and you have to factor that into your business. There are plenty of factors that contribute to link loss, such as the length and type of cable, or the amount of connectors. Low loss MPO or MTP connectors will give you greater adaptability and flexibility. The biggest thing to remember with any type of fiber optics product is that your daily tasks will be made simple. Processes that used to take up time will now be done in a much more efficient manner. With low loss connectivity, your functionality will increase, such as expanding the distance of your network due to the amount of connections possible.

 

How Will It Help?

As with anything in this sector, or any sector really, the key is to minimize risk. By using low-loss fiber connectivity, you’re effectively shrinking the risk that would’ve been there. In today’s data centers, optical insertion budgets are shrinking. It’s also important to recognize that much of the architecture for layouts has become flattened. Considering LANs now have higher port densities, flatter networks have become more prevalent. So, this isn’t necessarily something you have to do, but it would bring you incredible value.

 

What Are The Benefits?

The benefits to having low loss fiber connectivity is that it gives you a greater amount of connection points. Specifically, more connection points in 10, 40 and 100 gigabit Ethernet channels. Another main benefit from using this type of technology is how much easier it makes simple processes. With low loss fiber makes it much easier (and faster) to change your server connections between ports.

 

fiber-mart.com Can Help With All Of Your Fiber Connectivity Needs!

We focus on custom product manufacturing for fiber optic connectivity.  We will engineer solutions to any customer’s specs and needs, and we create end-to-end solutions so you won’t be left in the dark.  fiber-mart.com strives to provide our customers with the highest quality product above industry standards at a lower cost.

 

Do you need a custom fiber optic connectivity solution?  fiber-mart.com specializes in custom design solutions.  We work all over the world to provide solutions from our headquarters in Venice, Florida.  Our goal is to provide you with the perfect solutions, designs, and cabling.

Everything You Need to Know Before Buying CWDM and DWDM SFP+ Transceivers

by Fiber-MART.COM

It is known to us that WDM (Wavelength-division Multiplexing) can increase network bandwidth by allowing data streams at different frequencies to be sent over a single optical fiber. With the advent of this technology, different wavelengths can be assigned to optical modules like CWDM SFP+ transceiver and DWDM SFP+ transceiver, thus expanding and optimizing the network capacity. This post aims to be a buyer’s guide of CWDM and DWDM 10G SFP+ module selection.

 

CWDM and DWDM SFP+ Transceiver Basics

Both CWDM SFP+ and DWDM SFP+ transceivers are based on the popular SFP form factor. They are commonly used in 10G Ethernet and all can reach a maximum speed of 11.25G. However, they are different in such aspects as wavelength, distance, and application.

 

10G CWDM SFP+ transceiver often operates at a nominal wavelength of CWDM wavelength. To be specific, CWDM SFP+ transceiver can support 18 wavelengths from 1270nm to 1610nm, and its transmission distance is from 20km to 80km. It is an important part in CWDM system. To learn more details about 10G CWDM SFP+ transceivers in CWDM system, you may read: How to Install Your CWDM MUX/DEMUX System

 

10G DWDM SFP+ transceiver operates at nominal DWDM wavelengths from CH17-CH61, supporting a transmission distance up to 80km. It is specifically designed for carriers and large enterprises that require a scalable, flexible, cost-effective system for multiplexing, transporting and protecting high-speed data, storage, voice and video applications. Since the wavelengths for DWDM network is boarder, 10G tunable DWDM SFP+ transceiver is also available in DWDM system, which can change the channel according to actual needs.

 

How to Select and Buy CWDM and DWDM SFP+ Transceiver on the Market

CWDM SFP+ or DWDM SFP+

CWDM SFP+ can typically support up to 18 channels, while DWDM SFP+ can support more than 40 channels on one strand of fiber. Although customers can gain more capacity and longer link distance from the DWDM SFP+, they have to pay more since cost of it is more expensive than CWDM SFP+. For customers that don’t require a long transmission distance, CWDM SFP+ may be the first choice. But in the long-term, DWDM SFP+ serves the future trend for high-density network better.

 

CWDM and DWDM SFP+ Transceiver Price

Compared with normal SFP+ modules, CWDM and DWDM SFP+ are more expensive due to the cost brought by different working modes. And as it has been mentioned before, CWDM SFP+ tends to be cheaper than DWDM SFP+. And generally speaking, the longer the supported transmission range is, the more expensive it would be for CWDM or DWDM transceivers. Also, transceivers from a third-party CWDM and DWDM SFP factory are much cheaper than the original manufacturers. Therefore, to purchase compatible modules can help you save a large sum of money.

 

CWDM and DWDM SFP+ Transceiver Supplier

As mentioned above, affordable transceivers can bring you a big save, but you need to pay attention to the reliability. Although the price for compatible modules is nice, not all of them on the market are qualified. If you don’t want to go “buy cheap, buy twice”, you need a reliable supplier. Reputed third-party suppliers like fiber-mart.COM have their own test labs to ensure the compatibility and quality of the transceiver. Customers can also enjoy after sale service and warranty from these trustworthy CWDM SFP+ suppliers.

 

Common Questions When Buying and Using CWDM and DWDM SFP+ transceivers?

1. How About the Price of CWDM SFP+ Transceiver and DWDM SFP+ Transceivers?

 

Generally speaking, the branded CWDM and DWDM transceivers are much expensive than compatible ones. Here we take Cisco CWDM-SFP10G-1470 and Cisco DWDM-SFP10G-61.41 for example. The prices for the original ones are $1500 and $2,345, while CWDM SFP10G 1470 from fiber-mart.COM only takes $360 and $369 respectively.

 

2. Do Cisco Switches Have to Be Used with Original Cisco CWDM SFP+?

 

No. There are many compatible transceivers provided by third party transceiver supplier that you can adopt to replace Cisco CWDM SFP+ or even Cisco DWDM SFP+. If you can get your transceivers from a reliable third-party supplier, they will be just as dependable as the Cisco branded ones, but for a fraction of the price.

 

3.Is It Possible to Convert the Conventional Wavelength like 850nm into DWDM or CWDM Wavelength?

 

Yes. If you need to convert the wavelengths into CWDM or DWDM wavelengths, you can employ an OEO converter to make this happen. OEO converter realizes wavelength conversion based on the O-E-O transformation technology.

 

4. How to Choose Between 100GHz and 50GHz in DWDM Channel Spacing?

 

Compared with 50GHz, the 100GHz C-Band is the commonly used in the telecom industry. The spacing between the channels is 0.8nm and it’s around 1550nm. The colors or wavelength are named in channels and channel 17 to 61 is commonly used. The 50GHz with 0.4nm spacing and other spectrum bands can be provided by most manufacturers as well.

 

5. How to Select the Suitable Fiber Cables for CWDM and DWDM SFP+ Transceivers?

 

Fiber optic cables can be categorized into two types: single-mode and multimode fiber optic cables. The former is normally used for long-distance transmission while the latter for short-distance transmission. For CWDM and DWDM SFP+ transceiver, which can support a link up to 80km, we choose single-mode fiber cables terminated with LC connector.

 

6. Is There a Difference Among CWDM and DWDM Wavelengths for Transmission Quality? Which Wavelengths Are Better?

 

Yes. Different wavelength may deliver different transmission quality. Generally speaking, 1470nm and 1550nm are the most widely used wavelength, with 1550nm being more popular since the attenuation of 1550nm is lesser and ensures better transmission quality in long-distance application.

 

Buy CWDM and DWDM SFP+ Transceivers With Less Money and Fewer Worries

As it has been mentioned before, to purchase compatible transceivers from a reliable source can be a real money-saver. The following table displays the information of compatible CWDM and DWDM SFP+ Transceivers from fiber-mart.COM.

 

Also, fiber-mart.COM provides customized services, including SFP vendor name, interface type, distance, wavelength, DDM/DOM, temperature, label, label design, and shipping package. If you need customized service or you’re unsure of which type you need, you can contact fiber-mart.COM and they will help you.

 

As a leading supplier for optical products, fiber-mart.COM can provide all the equipment you need for building a CWDM or DWDM network. And all these products are assured with a warranty and return policy.

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.

Introduction Of Specialty Fibers For Optical Communication Systems

Optical fiber communications have changed our lives over the last 40 years. There is no doubt that low-loss optical transmission fibers have been critical to the enormous success of optical communications technology. It is less well known however, that fiber-based components have also played a critical role in this success.

 

Initially, fiber optic transmission systems were point to point systems, with lengths significantly less than 100 km. Then in the 1980s, rapid progress was made on the research and understanding of optical components including fiber components. Many of these fiber components found commercial applications in optical sensor technology such as in fiber gyroscopes and other optical sensor devices. Simple components such as power splitters, polarization controllers, multiplexing components, interferometric devices, and other optical components proved to be very useful. A significant number of these components were fabricated from polarization maintaining fibers (PMFs). You can buy the PM fiber patch cables from Fiberstore.

 

Although not a large market, optical fiber sensor applications spurred research into the fabrication of new components such as polarization maintaining components, other components such as power splitters were fabricated from standard multimode (MM) or single-mode telecommunication fiber. In the telecommunication sector, the so-called passive optical network was proposed for the already envisioned fiber-to-the-home (FTTH) network. This network relied heavily on the use of passive optical splitters. These splitters were fabricated from standard single-mode fibers (SMFs). Click here to get the price single mode cable fiber optic. Although FTTH, at a large scale, did not occur until decades later, research into the use of components for telecommunications applications continued.

 

The commercial introduction of the fiber optical amplifier in the early 1990s revolutionized optical fiber transmissions. With amplification, optical signals could travel hundreds of kilometers without regeneration. This had major technical as well as commercial implications. Rapidly, new fiber optic components were introduced to enable better amplifiers and to enhance these transmission systems. Special fibers were required for the amplifier, for example, erbium-doped fibers. The design of high-performance amplifier fibers required special considerations of mode field diameter, overlap of the optical field with the fiber active core, core composition, and use of novel dopants. Designs radically different from those of conventional transmission fiber have evolved to optimize amplifier performance for specific applications. The introduction of wavelength division multiplexing (WDM) technology put even greater demands on fiber design and composition to achieve wider bandwidth and flat gain. Efforts to extend the bandwidth of erbiumdoped fibers and develop amplifiers at other wavelength such as 1300nm have spurred development of other dopants. Codoping with ytterbium (Yb) allows pumping from 900 to 1090nm using solid-state lasers or Nd and Yb fiber lasers. Of recent interest is the ability to pump Er/Yb fibers in a double-clad geometry with high power sources at 920 or 975 nm. Double-clad fibers are also being used to produce fiber lasers using Yb and Nd.

 

Besides the amplication fiber, the EDFA (Erbium-Doped Fiber Amplifier) requires a number of optical components for its operation. These include wavelength multiplexing and polarization multiplexing devices for the pump and signal wavelengths. Filters for gain flattening, power attenuators, and taps for power monitoring among other optical components are required for module performance. Also, because the amplifier-enable transmission distance of hundreds of kilometers without regeneration, other propagation propeties became important. These properties include chromatic dispersion, polarization dispersion, and nonlinearities such as four-wave mixing (FWM), self-and cross-phase modulation, and Raman and Brillouin scattering. Dispersion compensating fibers were introduced in order to deal with wavelength dispersion. Broadband coupling losses between the transmission and the compensating fibers was an issue. Specially designed mode conversion or bridge fibers enable low-loss splicing among these thre fibers, making low insertion loss dispersion compensators possible. Fiber components as well as microoptic or in some instance planar optical components can be fabricated to provide for these applications. Generally speaking, but not always, fiber components enable the lowest insertion loss per device. A number of these fiber devices can be fabricated using standard SMF, but often special fibers are required.

 

Specialty fibers are designed by changing fiber glass composition, refractive index profile, or coating to achieve certain unique properties and functionalities. In addition to applications in optical communications, specialty fibers find a wide range of applications in other fields, such as industrial sensors, biomedical power delivery and imaging systems, military fiber gyroscope, high-power lasers, to name just a few. There are so many linds of specialty fibers for different applications. Some of the common specialty fibers include the following:

 

Active Fibers: These fibers are doped with a rare earth element such as Er, Nd, Yb or another active element, The fibers are used for optical amplifiers and lasers. Erblium doped fiber amplifiers are a goog example of fiber components using an active fiber. Semiconductor and nanoparticle doped fibers are becoming an interesting research topic.

Polarization Control Fibers: These fibers have high birefringence that can maintain the polarization state for a long length of fiber. The high birefringence is introduced either by asymmetric stresses such as in Panda, and bowtie design. If both polarization modes are available in the fiber, the fiber is called PMF. If only one polarization mode propagates in the fiber while the other polarization mode is cutoff, the fiber is called single polarization fiber.

Dispersion Compensation Fibers: Fibers have opposite chromatic dispersion to that of transmission fibers such as standard SMFs and nonzero dispersion shifted fibers (NZDSFs). The fibers are used to make dispersion compensation modules for mitigating dispersion effects in a fiber transmission system.

Highly Nonlinear Optical Fibers: Fibers have high nonlinear coefficient for use in optical signal processing and sensing using optical nonlinear effects such as the optical Kerr effect, Brillouin scattering, and Raman scattering.

Coupling Fibers or Bridge Fibers: Fibers have mode field diameter between the standard SMF and a specialty fiber. The fiber serves as an intermendiate coupling element to reduce the high coupling loss between the standard SMF and the specialty fiber.

Photo-Sensitive Fibers: Fibers whose refractive index is sensitive to ultraviolet (UV) light. This type of fiber is used to produce fiber gratings by UV light exposure.

High Numerical Aperture (NA) Fibers: Fibers with NA higher than 0.3. These fibers are used for power delivery and for short distance communication applications.

Special SMFs: This category includes standard SMF with reduced cladding for improved bending performance, and specially designed SMF for short wavelength applications.

Specially Coated Fibers: Fibers with special coating such as hermitic coating for preventing hydrogen and water penetration, metal coating for high temperature applications.

Mid-Infrared Fibers: Non-silica glass-based fibers for applications between 2 and 10 micron

Photonic Crystal Fibers (PCFs): Fibers with periodic structure to achieve fiber properties that are not available with conventional fiber structures.

Everything You Need to Know About the 10Gbase Copper Transceiver

If you haven’t heard about 10Gbase technology yet, it consists of communications technology that enables 10-Gigabit Ethernet operations over twisted pair copper cable, and that covers both un-shielded and shielded cable. The 10Gbase cables made of copper offer the appeal of affordability along with great performance, so altogether that’s a pretty tough combination to beat.

 

Any IT manager who has ever been faced with implementing a network of fiber optics is well aware of the tremendous cost that fiber optic cabling costs, which is why this copper-based technology can be so useful. With this kind of technology now generally available, IT managers have another legitimate option they can choose for 10G networks.

 

The 10Gbase copper transceiver

Designed to handle high speed communication links which make use of 10-Gigabit Ethernet and CAT 6a and CAT 7 cabling, this copper transceiver is capable of ultra high performance, and can comfortably mange bi-directional communication over copper cables. It is the very first transceiver to have these capabilities while also being made entirely of copper, to keep costs out of the stratosphere. It is also compliant with the published standards set forth in SFF-8431 and in SFF-8432 MSA. The multi-source agreement (MSA) is a standard established by multiple network device manufacturers to make products which are compatible across vendors.

 

Wattage savings

 

In addition to being extremely affordable, the 10Gbase copper transceiver is capable of saving at least 1/2 W per port, when compared to an embedded RJ45 port setup at link distances of 30 m. This is what allows it to be more effective and better-performing in rack-by-rack and port-by-port connection setups. When cables are adjusted or become positioned at different angles, there is no link loss because of how strong and robust the mechanical side of it remains. Without changing your existing network infrastructure at all, you can instantly extend the life of hardware switches in your network.

 

Why use the 10Gbase copper transceiver?

 

If you haven’t already been convinced, there are still more reasons to use the 10Gbase copper transceiver. There’s no other transceiver which has the capability of delivering data at speeds up to 10Gbps over CAT 6a or CAT 7 cables, while at the same time delivering 10G data transmission to copper-interfaced equipment.

 

It simply provides the greatest flexibility for copper applications of a low-density nature, and represents a considerable improvement over any kind of fixed-port 10G switch. These copper transceivers are also already compatible with many of the biggest brand names in network equipment, e.g. Cisco, Dell, and Arista.

 

Buy 10Gbase copper transceiver for sale online

4Fiber is a leading manufacturer of fiber optic technology. Be sure to check out fiber-mart.com online store for the latest fiber products, including optical transceivers.

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

How To Repair The Accidentally Cut Fiber Optic Cables

Underground fiber optic cables can be accidentally cut. The most typical factor which could cause this accident may be the utilization of backhoe while digging. If it happens to you, you can simply search for backhoe and obtain the cut cables.

However, if it is brought on by moles, it will likely be difficult for you to troubleshoot it. You will need some equipment to involve. Here are a few steps suggested for you.

The first thing you need to do is to look for the break in your cable. Commonly, the fiber-optic technicians utilize a device which is known as an optical time-domain reflectometer or OTDR. With the ability to work like radar which sends a light pulse right down to the cable. It will be deflected to your device when it encounters break. It helps technician knows the position of the break.

After knowing the location of the break, you should dig up the cable with the break. Then, strip the fiber around 9 feet of the cable using cable rip cord. Peel the jacket gently so the fiber-optic tubes exposed and get rid of the excess jacket. Then, clean that cable gel using cable gel remover and cut any sheath and yarn. Separate the tubes from the fiber. Avoid damaging the strength member as it is required to hold the cable in fiber splice closure.

 Simplex OM3 10G 50/125 Multimode Fiber Optic Patch Cable Simplex OM3 10G 50/125 Multimode Fiber Optic Patch Cable

The next matter you need to do is to expose fiber cladding at 2 inches by using a fiber-coating stripper oral appliance clean the fiber within the tubes. Trim any damage on the fiber ends using high-precision fiber cleaver. If you want to perform a fusion splice, you have to convey a fusion splice protector to the fiber. Hereafter, you have to clean that striped fiber using lint-free wipes that is soaked in alcohol. In addition, if you want to produce a mechanical connection, you need to put quick-connect fiber-optic connectors to the fiber and clean the stripped fiber with alcohol and lint-free wipes. Ensure that the fiber doesn’t touch anything.

If you make a fusion splice, you have to place the fibers which is spliced within the fusion splicer. Then, fire the fusion splicer in line with the manual. After that, you have to move the fusion connector right into a heat shrink oven. Press a button to heat shrink. In some cases, the fusion splice is preferable to mechanical splice because the signal loss is under 0.1 decibels (dB). However, the mechanical splice has signal loss under 0.5 dB. The very last thing would be to see the connection of fiber-optic using the OTDR. Then put back those splices in to the splice enclosure. Close the enclosure after which rebury the cable.

ST to FC single mode duplex fiber optic patch cable

We are fiber optic patch cord supplier; we offer fast delivery for ST to FC single mode duplex fiber optic patch cable. Our fiber optic patch cord are widely used in optical communication networks and FTTH applications.it features low insertion loss and high return loss.

ST to FC single mode duplex fiber optic patch cord is with ST connector, here the ST means Straight Tip.ST connector has a bayonet mount and a long cylindrical Ferrule to hold the fiber. ST fiber optic connector is the most popular optical connector in networking applications. We are ST FC single mode duplex patch cord company and manufacturer; we offer fast delivery and custom made service.

ST to FC single mode duplex fiber optic patch cables 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

MTRJ to MTRJ Duplex 9/125 Single-mode Fiber Patch Cable 25 meters

MTRJ-MTRJ Duplex 9/125 Single-mode Fiber Patch Cable 25 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.

MTRJ-MTRJ 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: MTRJ to MTRJ 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: 25 meter Color: Yellow

Introduction to Simplex, Half Duplex and Full Duplex

Introduction to Simplex, Half Duplex and Full Duplex

by Fiber-MART.COM

Simplex, half duplex and full duplex are three kinds of communication channels in telecommunications and computer networking. These communication channels provide pathways to convey information. A communication channel can be either a physical transmission medium or a logical connection over a multiplexed medium. The physical transmission medium refers to the material substance that can propagate energy waves, such as wires in data communication. And the logical connection usually refers to the circuit switched connection or packet-mode virtual circuit connection, such as a radio channel. Thanks to the help of communication channels, information can be transmitted without obstruction. A brief introduction about three communication channel types will be given in this article.

Three Types of Communication Channel

1) Simplex

A simplex communication channel only sends information in one direction. For example, a radio station usually sends signals to the audience but never receives signals from them, thus a radio station is a simplex channel. It is also common to use simplex channel in fiber optic communication. One strand is used for transmitting signals and the other is for receiving signals. But this might not be obvious because the pair of fiber strands are often combined to one cable. The good part of simplex mode is that its entire bandwidth can be used during the transmission.

 

2) Half duplex

In half duplex mode, data can be transmitted in both directions on a signal carrier except not at the same time. At a certain point, it is actually a simplex channel whose transmission direction can be switched. Walkie-talkie is a typical half duplex device. It has a “push-to-talk” button which can be used to turn on the transmitter but turn off the receiver. Therefore, once you push the button, you cannot hear the person you are talking to but your partner can hear you. An advantage of half-duplex is that the single track is cheaper than the double tracks.

 

 

3) Full duplex

A full duplex communication channel is able to transmit data in both directions on a signal carrier at the same time. It is constructed as a pair of simplex links that allows bidirectional simultaneous transmission. Take telephone as an example, people at both ends of a call can speak and be heard by each other at the same time because there are two communication paths between them. Thus, using the full duplex mode can greatly increase the efficiency of communication.

 

 

Simplex Fiber Optic Cable vs. Duplex Fiber Optic Cable

A simplex fiber optic cable has only one tight-buffered fiber inside cable jacket for one-way data transmission. The aramid yarn and protective jacket enable the cable to be connected and crimped to a mechanical connector. It can be used for both single-mode and multimode fiber optic cables. For instance, single-mode simplex fiber optic cable is suitable for networks that require data to be transmitted in one direction over long distance.

 

Different from simplex fiber optic cable, the duplex one has two fibers constructed in a zipcord style. It is often used for duplex communication between devices to transmit and receive signals simultaneously. The duplex fiber optic cable is required for all sorts of applications, such as workstations, fiber switches and servers, fiber modems and so on. And single-mode or multimode cable is also available with duplex cables.

Conclusion

The concept of communication channel is important for understanding the operation of networking. Simplex, half duplex and full duplex are three modes of communication channels. Each of them can be deployed for different applications. It is more cost-effective to choose the right fiber optic cable according to its channel mode.