CWDM technology utilizes optical division multiplexer to multiplex optical signals with different wavelengths to single fiber for transmission. In the receiving terminal of the link, through optical division demultiplexer, composite signals in the fiber are demultiplexed to the signals with different wavelengths connected with corresponding receivers. CWDM is in low cost, low power consumption, small volume and other advantages. Due to Its emergence, carrier operators found a transmission resolution plan with low price and high performance, which has greatly improved fiber availability and brought about great convenience for carrier operators and users.

Basic Structure of 100G CWDM Network

Basic structure of 100G CWDM network: 10G CWDM SFP & light module & LC optical patch & CWDM multiplexer/demultiplexer & fiber & CWDM multiplexer/demultiplexer & LC optical patch & 10G CWDM SFP & light module. These parts can increase the capacity of data transmission. The following will focus on the construction of the CWDM multiplexer/demultiplexer and the attentions for selecting the 10 G CWDM SFP & light module.

Construction of the CWDM Multiplexer/Demultiplexer

Simply, the multiplexer in the CWDM multiplexer/demultiplexer multiplexes some optical signals with different wavelengths to one fiber for transmission. In the demultiplexer, composite signals transmitted by the end multiplexer are decomposed into the original multiplexed optical signals with different wavelengths. The standard CWDM has 18 channels while most CWDM multiplexers/demultiplexers provide channels range from 2 to 16. But Cozlink fiber can provide CWDM multiplexer/demultiplexer with 18 channels, which maximizes the capacity of CWDM network.

How to select proper 10G CWDM SFP & light module?

 (1) Selecting right working wavelength: for example, 10G CWDM SFP & light module should be connected to the interface of CWDM multiplexer and demultiplexer with 1270nm. Due to 18 different wavelengths of CWDM multiplexer and demultiplexer, in order to ensure the correct connection, light module's working wavelength should be in accordance with the provisioned wavelengths in the CWDM multiplexer and demultiplexer's interfaces.

 (2) Selecting the light module compatible with the switch: for example, if you use a CISCO switch, its 10G CWDM SFP & light module is the original CISCO light module or CISCO compatible light module provided by the third party supplier. Because the price of the latter is much lower than that of the former, the latter is more and more popular. A Selection of right 10G CWDM SFP & light module cannot only reduce your cost and time but provide high network performance.

(3) Selecting the light module with appropriate transmission distance: 10G CWDM network is commonly used for long-distance transmission. Therefore, the 10GCWDM SFP& light module available on the market usually supports the transmission distance of over 20km. Some can support up to80km or longer distance. You can choose 10 GCWDM SFP& light module according to the specific needs of the transmission distance.