There are many kinds of optical modules, including QSFP28 optical module, QSFP+ optical module, SFP+ optical module, SFP optical module, CWDM optical module, DWDM optical module and so on. Each optical module has different application scenarios and functions. Today we will introduce the CWDM optical module to you.

Description of CWDM optical module:

1. CWDM optical module adopts CWDM (coarse wavelength division multiplexing) technology, which is a low-cost WDM transmission technology for man access layer. Through the external WDM, the optical signals of different wavelengths can be combined together and transmitted through a single optical fiber, thus saving optical fiber resources. At the same time, the receiver needs to use a WDM to decompose the complex optical signal.

2. It is used to realize the connection between existing network equipment and CWDM multiplexer / demultiplexer. When used with a CWDM multiplexer / demultiplexer, the CWDM optical module can increase network capacity by transmitting multiple data channels with a single optical wavelength (1270nm to 1610nm) on the same single fiber.

3. CWDM optical module is a kind of optical transceiver module which combines CWDM Technology. It is an economic and efficient network connection solution, which is widely used in campus, data center, Gigabit Ethernet and fibre channel (FC) network applications in man.

Product standard of CWDM optical module

1. From 1270nm to 1610nm, 18 channels are available, with a wavelength interval of 20nm

2. Optional package: SFP/SFP+/XFP/XENPAK/X2/SFP28

3. Transmission distance: 10km-120km

4. Working temperature: 0°C-70°C（Commercial） -40℃-85℃（Industrial）

5. Duplex LC

6. RoHS compliant

Common types of CWDM optical modules

Common CWDM optical modules include CWDM SFP optical module, CWDM SFP+ optical module and CWDM SFP28 optical module

1. CWDM SFP optical modules

CWDM SFP optical module is a kind of optical module which combines CWDM Technology. Similar to traditional SFPs, CWDM SFP optical module is a hot plug I / O device inserted into the switch or router's SFP port, and connected to the optical network through this port. It is an economic and efficient network connection solution, which is widely used in campus, data center, Gigabit Ethernet and fibre channel (FC) network applications in man.

2. CWDM SFP+ optical modules

The CWDM SFP+ optical module uses an external WDM to combine optical signals of different wavelengths and transmit them through a single optical fiber, thus saving optical fiber resources. At the same time, the receiver needs to use a WDM to decompose the complex optical signal. The CWDM SFP+ optical module is divided into 18 bands, ranging from 1270nm to 1610nm, and each band is separated by 20nm.

3. CWDM SFP28 optical modules

CWDM SFP28 optical module adopts SFP28 package with hot plug and duplex LC interface. It complies with SFP28 MSA, 25G Ethernet and CPRI / ecpri standards, with a maximum speed of 25.78125Gbps. The wavelength of CWDM SFP28 optical module is 1270nm-1370nm and 1470nm-1570nm (the distance between each two wavebands is 20nm), and the transmission distance through single-mode optical fiber is up to 10km.

Advantages of CWDM optical module

1."Transparent" transfer of data;

2.Large capacity, making full use of the huge bandwidth resources of optical fiber;

3.It greatly saves the optical fiber resources and reduces the construction cost;

4.High flexibility, economy and reliability of networking;

5.It can be switched in all-optical network and realize long-distance transmission without electric relay;

6.The simplified laser module reduces the volume of the equipment and saves the room space;

7.Optical layer recovery is independent of service and rate, which can protect data effectively;

8.Without semiconductor cooler and temperature control function, the power consumption can be significantly reduced, which is only 12.5% of DWDM optical module.

ETU-Link provides a series of dual fiber bidirectional CWDM optical modules and rough wavelength division network solutions, providing customers with one-stop optical module products with high cost performance.