WDM Transceivers - DWDM SFP and CWDM SFP

You may have noticed the CWDM and DWDM transceivers, like CWDM SFP, CWDM XFP, DWDM SFP, DWDM XFP,...But what are they used for?

These transceivers are designed to be used with passive optical multiplexers. If you have a number of these all transmitting on different wavelengths, you can use a passive multiplexer to combine each signal onto a single fiber pair, and then de-multiplex the signal at the far end. Unlike active systems, a passive multiplexer requires no power or management - it's literally a set of waveguides and prisms in a rackmount chassis - which greatly reduces the cost of doing WDM and eliminates a potential point of failure in the system. DWDM SFP optical transceiver enables datacom providers to use DWDM technology to support the growth of their network while eliminating the need for costly optical transport equipment.

You can either buy transceivers that are set to specific wavelengths (which will match up to an ITU-defined frequency grid, depending on CWDM or DWDM types) or you can buy tunable transceivers that can be set to any wavelength on the corresponding grid.

The tunable DWDM SFP optical modules can enable operators of telecom, datacom, and enterprise DWDM networks to significantly reduce sparing costs, improve operational efficiency, and turn up new customers or circuits more quickly than with conventional fixed-wavelength transceivers.

The MSA-compliant tunable SFP+ modules for support of distances up to 80km. The transceivers can be tuned to any of 102 standard ITU channels, at C-band 50-GHz spacing. They are available in both linear and limiting electrical interfaces.

The SFP+ transceiver is a hot pluggable module capable of supporting 10 Gigabit Ethernet as well as 10G Fibre Channel traffic over reaches of up to 40 km. The module gives datacom and telecom providers greater flexibility without the added expense of lighting a link with an 80-km reach. These DWDM SFP+ transceivers are available in 40 standard 100-GHz spaced ITU DWDM channels. They feature digital diagnostics, also known as digital optical monitoring (DOM), which enables real-time monitoring of optical output power (Tx), optical input power (Rx), temperature, laser bias current, and transceiver supply voltage.

For other types of fiber optic transceivers, GBIC, SFP, XFP, X2, XENPAK, CFP, QSFP transceiver, sourcing on the B2B marketplace en.OFweek, has collecting various reliable fiber optic transceiver manufacturers for you to choosing.