What Is CWDM SFP Transceiver

Being a kind of compact optical transceiver, the CWDM SFP Transceiver is widely used in optical communications for both telecommunication and data communication. Basing on the SFP form factor which is a MSA standard build, it is designed for operations in Metro Access Rings and Point-to-Point networks using Synchronous Optical Network (SONET), SDH (Synchronous Digital Hierarchy), Gigabit Ethernet and Fibre Channel networking equipment.


The CWDM SFP Transceiver is a cost effective module with high performance, supporting data-rate of 1.25 Gbps and 80km transmission distance. It has a specific laser which emits a “color” defined in the CWDM International Telecommunication Union (ITU) grid that is defined from 1270 to 1610nm and has steps of 20nm. Thus its available wavelength includes 1270nm, 1290nm, 1310nm, 1330nm, 1350nm, 1370nm, 1390nm, 1410nm, 1430nm, 1450nm, 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm and 1610nm.

The CWDM SFP transceiver is consist of an uncooled CWDM Distributed Feed Back (DFB) laser transmitter, a Pin photodiode integrated with a Trans-impedance Preamplifier (TIA) and a Microprogrammed Control Unit (MCU). The DFB laser used in the CWDM SFP transceiver transmitter, which is a 18 CWDM DFB wavelengths laser, is well suited for high capacity reverse traffic. Obeying the standard diode equation for low frequency signals, The PIN photodiode has a 80km transmission distance. And the MCU is a high-speed, executive, input-output (I/O) processor and interrupt handler for the Network Restructuring Language (NRL) Signal Processing Element (SPE).

The CWDM SFP is a hot-swappable, transceiver component that can be plugged into a SFP-compatible uplink port. And each SFP port must match the wavelength specifications on the other end of the cable which must not exceed the stipulated cable length for reliable communications.

Applied to the access layer of Metropolitan Area Network (MAN), The CWDM SFP is a low-cost Wavelength Division Multiplex (WDM) transmission technology. Adopting the CWDM technology, it can combine optical signals with different wavelength together and transmit them with one fiber strand. It can largely save the fiber resources. The CWDM SFP allows enterprise companies and service providers to provide scalable and easy-to-deploy Gigabit Ethernet and Fibre Channel services in their networks, enabling the flexible design of highly available, multiservice networks.

Fiberstore’s CWDM SFP transceiver provides a convenient and cost-effective solution for the adoption of Gigabit Ethernet and Fiber Channel (FC) in campus, data-center, and metropolitan-area access networks. With its maximum optical budget of 41dB, Fiberstore CWDM SFP modules support data rates from 100 Mbps up to 4.25 Gbps.

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