DWDM Solutions for Metropolitan Area Network

by Fiber-MART.COM

Today’s services like voice, video and data networks are getting complex and growing tremendous, as well as requiring more bandwidth and faster transmission rates over farther distances. All these cause ferocious competition in the service provider market. And it’s impossible to charge more for the ever-increasing access speed, which resulted in the deployment of DWDM (dense wavelength-division multiplexing) technology in the long-haul transoceanic and terrestrial networks. As DWDM equipment becomes more economical and cost-effective, to deploy them in the metropolitan area network (MAN) is necessary.

 

Why DWDM is Necessary for MANs?

When it comes to DWDM for MANs, many people may ask “Why is DWDM suddenly so popular for MAN applications?” Considering both the DWDM technology and MAN, this question can be discussed from two aspects.

 

The first one is the situation of MAN at present. The practical demands for bandwidth and speed of users affect service providers in the MANs. They have to face problems such as service diversity, bandwidth scalability and fiber exhaustion. Bandwidth scalability deals with the capability of the fiber to carry traffic at exponentially greater speeds. Only by that, the bandwidth provided by service managers may meet the requirements. As for fiber exhaustion, adding more fiber cables may be helpful, but it will cost more and need a long time to finish.

 

Another one is the advantages of deployment DWDM technology. DWDM technology was first deployed on long-haul routes in a time of fiber scarcity. And it finds applications mainly in ultra-high bandwidth long haul as well as in ultra-high-speed metropolitan or inner-city networks, and at the edge of other networks like SONET, SDH and IP. As the ubiquitous deployment of DWDM network and the passive or active DWDM equipment, DWDM technology is expected to be the low-cost solution in MANs and many access-type networks like FTTH and FTTD.

 

Essential DWDM Equipment Used in MAN

As we know, in DWDM networks, multiple wavelengths of light are multiplexed into one single fiber. Therefore, DWDW equipment should be capable of combing or removing signals. Here are three main types of DWDM equipment used in MAN.

 

DWDM Multiplexer and Demultiplexer (DWDM Mux/Demux)

DWDM Mux/Demux modules deliver the benefits of DWDM technology in a fully passive solution. They provide a good solution for long-distance links where wavelengths are packed tightly together over the C-band range of wavelengths, up to 48 wavelengths in 100GHz grid (0.8nm) and 96 wavelengths in 50GHz grid (0.4nm). Usually the common configuration of DWDM Mux/Demux is from 8 channels to 96 channels.

 

DWDM Optical Add/Drop Multiplexer (DWDM OADM)

In order to connect different sites via individual wavelengths, a DWDM system needs to have the capability to add and drop services at distinct locations. That’s why DWDM OADM is needed. OADM can pass-through, remove or add the channels as required. It’s a pass type of DWDM equipment. And the optical losses are different for the add, drop, and pass-through channels.

 

DWDM Erbium-Doped Fiber Amplifier (DWDM EDFA)

Since DWDM network is designed for long runs transmission, the optical power of signals will attenuate with the distances increase. To ensure the quality of signals, DWDM EDFA are used according to the power budget between the transmitter and receiver. Usually based on the used places, there are three common types of fiber amplifiers: booster, in-line amplifier and pre-amplifier. And the gain also can be customized based on specific needs.

 

fiber-mart.COM DWDM Solution for Metropolitan Area Network

Today’s explosion in data traffic, fueled in large part by the growth of the Internet, has caused rapid depletion of available fiber bandwidth in the metropolitan area. The bandwidth bottleneck is now that of the MANs, where capacity has not increased as greatly as the long-haul networks. To meet the demand for long runs transmission in MANs, fiber-mart.COM provides FMT multi-service transport platform for flexible and high density DWDM networking solution. All DWDM equipment like EDFA, OEO, DCM and OLP (optical line protection) come in small plug-in cards, enabling easy installation and management during network deployment. For more details about this DWDM solution, please read this article: Extend DWDM Network Transmission Distance With Multi-Service Transport Platform

Industrialization of PLC splitter chip technology

by Fiber-MART.COM

Fiber optic communication network has become the cornerstone of today’s world of information transfer. With the further development of the network and increasing market demand for communication bandwidth, the entire communication network at the part between the user’s last ten kilometers and last one kilometer are now using optical fiber. FTTH becomes an important direction of the development of fiber optic communication network.

 

Preparation of PLC Technology

FTTH mainly uses PON network technology, which requires a large number of low-cost optical splitters and other optical passive components. Optical splitter device is an integral part of FTTH network. And with the promotion of FTTH, there would be a greater market demand. The traditional preparation of optical splitter technology is fiber fused biconical taper (FBT) technology. Its characteristics are mature and simple technology. The disadvantage is that the assigned ones and the device size are too large, which caused the decrease in yield and the rising cost of single channel. Therefore, FBT technology based fiber optic splitter preparation techniques have been unable to adapt to the market demand. The following picture shows the FBT technology process.

 

Advent of PLC Technology

As you can see from the perspective of development of optical devices, PLC technology has become a mainstream technology for large-scale preparation of high-performance and low-cost optical splitter. It is the use of PLC technology by producing the optical splitter chip coupled with the optical fiber array package that completes the preparation of the optical splitter. Its features are small device size, low cost and good splitter uniformity. But at the same time, the technical threshold is relatively high, especially for the production of large optical splitters which are suitable for mass production. By analyzing of PLC technology, you can see that the glass-based PLC technology has great advantages in terms of equipment investment, production costs, the optimal choice of production required for FTTH and low-cost optical devices such as optical splitter.

 

Applications of PLC Technology in China

Internationally, PLC technology has been widely used in the miniaturization, high-performance optical device fabrication and production, and the optical splitter chip in particular. In China, however, the reality is that we have become a PLC encapsulation big country, but is limited to the optical splitter and optical device fabrication device coupled packaging and downstream industry chain having no PLC chip health line. And PLC core device chips are entirely dependent on imports. There is a problem that the core preparation technique of the PLC device lies in the outward, which has resulted in major cost control of the device and also led to the lack of technical support further to the high-end integrated chip development. This severely hinders the development of our country in the PLC application.

 

Manufacturing of PLC Splitter Chip

PLC splitter chip manufacturing process PECVD (plasma enhanced chemical vapor deposition) and FHD (flame hydrolysis deposition) and ion exchange. The former two with the substrate material is a silicon-based silica, and the latter with the substrate material is glass. AWG (arrayed waveguide grating) chip production, silica optical waveguide splitter chips can be produced on silica on silicon waveguide or glass waveguide. Production by ion exchange glass waveguide PLC chip domestic number of colleges and universities have been conducting research and development. Technical appraisal sample has been reached the international advanced level of similar products. Further pilot research and development will be able to achieve your PLC splitter chip mass production. In fact, in addition to the production of optical splitter chip, glass-based PLC technology R & D production environment with a wide range of other potential applications, for example, can be applied to detect the required light sensor.

 

Common Types of PLC Splitter

Nowadays, many kinds of PLC splitters with optical splitter chips are on the market for different network connections. Bare fiber PLC splitter has no connector at the bare fiber ends. Blockless PLC splitter has a compact stainless tube package providing stronger fiber protection with terminated ends. ABS PLC splitter has a plastic ABS box to protect the PLC splitter. Other types like fanout splitter, tray type splitter, rack-mount splitter, LGX splitter and mini plug-in type splitter are also widely applied to the FTTH networks.

 

Conclusion

PLC splitter chip technology has greatly improved the implementation of FTTH network. fiber-mart.COM provides all kinds of PLC splitters listed above. If you are interested, please search our website for more detailed information.

LC to FC single mode simplex fiber optic patch cable

We are LC to FC single mode simplex fiber optic patch cords supplier. Our company is fiber optic patch cord supplier in China; LC FC single mode simplex patch cord features Good Durability, Good exchangeability and High precision alignment.

LC to FC single mode simplex fiber optic patch cable ordering information:

Fiber optic connector: LC, ST, FC, SC, MTRJ, DIN, D4, E2000, MPO

Ferrule Interface type: APC, PC, and UPC

Fiber cores: Simplex, duplex

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

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

Cable length; customize

LC to FC single mode simplex fiber optic patch cords is with LC fiber optic connector, which is a push and latch structure. LC connector has a small form-factor Fiber optic connector, is widely used for densely installation. The LC fiber optic connector has good performance and is highly favored for single mode .We are LC FC single mode simplex patch cord company and manufacturer, we offer fast delivery and custom made service.

Cisco 4.25Gbps 50GHz DWDM SFP 80km Compatible Transceiver

DWDM-SFP4GH-80

The DWDM-SFP4GH-80 series single mode transceiver is small form factor pluggable module for duplex optical data communications. This module is designed for single mode fiber and operates at a nominal DWDM wavelength from 1528.77nm to 1563.86nm as specified by the ITU-T. It is designed to deploy in the DWDM networking equipment in metropolitan access and core networks. It is with the SFP 20-pin connector to allow hot plug capability. The transmitter section uses a DWDM multiple quantum well DFB laser and is a class 1 laser compliant according to International Safety Standard IEC-60825. The DWDM-SFP4GH-80 series are designed to be compliant with SFF-8472 Multi-Source Agreement (MSA).

Key Features

• Operating Data Rate up to 4.25Gbps
• Available in all C-Band Wavelengths on the 50GHz DWDM ITU Grid
• Compliant with Class 1 FDA and IEC60825-1 Laser Safety
• Single 3.3V Power Supply and TTL Logic Interface
• Hot-Pluggable SFP Footprint Duplex LC Connector Interface
• Compliant with SFP MSA
• Compliant with SFF-8472
• Average Output Power:0~5dBm
• Receiver Sensitivity:-24dBm

Applications

• Amplified DWDM networks
• Fiber Channel
• Other optical links
• Amplified DWDM networks

Ordering Information

Part No.	Data Rate (Gbps)	Frequency (GHz)	Channel/ Wavelength(nm)	TX Power (dBm)	Re Sens. (dBm)	Transmission Distance	Fiber Type	Connector Type	Temp. Range	Digital Diagnostics
DWDM-SFP4G-40	≤ 4.25	100GHz	CH17~CH61 (1563.86~1528.77)	0~5	﹤-18	40km	SMF	LC	Com./Ex./Ind.	Yes
DWDM-SFP4G-80	≤ 4.25	100GHz	CH17~CH61 (1563.86~1528.77)	0-5	﹤-24	80km	SMF	LC	Com./Ex./Ind.	Yes
DWDM-SFP4GH-40	≤ 4.25	50GHz	CH17~CH61 (1563.86~1528.38)	0~5	﹤-18	40km	SMF	LC	Com./Ex./Ind.	Yes
DWDM-SFP4GH-80	≤ 4.25	50GHz	CH17~CH61 (1563.86~1528.38)	0~5	﹤-24	80km	SMF	LC	Com./Ex./Ind.	Yes

Note

 

• Fiber-Mart also provide other 4.25G DWDM SFP transceivers with different transmission distances, like 80km

Packaging

• Antistatic bag
• Packed on pallets in a box(Default Customer Options)
• Specific Labels as Request
• Seperate white Box for each transceiver

OEM and ODM

Combining our extensive design and engineering capability in optical transceiver industry, with our competitive advantages from integrated manufacturing capability, internal supply chain, and cost competitive and scalable operation infrastructure, Fiber-Mart provides OEM, ODM, and contract manufacturing service to world leading customers with our manufacturing facilities in China.We are also mainly engaged in providing complete sets of optoelectronic device solutions to gain more brand extensions and influence for Fiber-Mart in the world.

• OEM/ODM order is available
• We can supply DWDM-SFP4GH-80 according to your requirements, and design DWDM-SFP4GH-80 label and packaging for your company. We welcome any inquiry for customized DWDM SFP optical transceiver.

Order Procedure

Please contact us with any special requirements you may have, we can help you create a custom solution to meet almost any application. Our engineer will review the project and provide a quotation within 1-2 business days.
a. Email (sales@fiber-mart.com) us a rough sketch to a detailed drawing.
b. Our engineer will review the project and provide a quotation within 24 hours.
c. We can arrange production as low as 1 piece and as high as 1,000 pieces in 1~4 business days once an order is placed.

Shipment

International Express: Fedex, DHL, UPS, TNT and EMS.If you have another preferred carrier, please notify us in advance.
FedEx Overnight: It will take 1-3 business days (weekends and holidays excepted) for delivery.
DHL: It will take 2-4 business days (weekends and holidays excepted) for delivery. For Spain, Italy, Brazil and some other countries, items will take longer time to arrive due to customs clearance period.

Save Cost By Buying DWDM SFP From Original Manufacturer Fiber-Mart Directly.

Fiber-Mart is an professional manufacturer & supplier of DWDM SFP transceivers. All of our DWDM SFP transceivers are tested in-house prior to shipping to guarantee that they will arrive in perfect physical and working condition. We guarantee DWDM SFP transceivers to work in your system and all of our DWDM SFP transceivers come with a lifetime advance replacement warranty. If you have questions about DWDM SFP optics, please feel free to contact us at sales@fiber-mart.com.