Dense wavelength division multiplexing (DWDM) refers originally to optical signals multiplexed within the 1550 nm band so as to leverage the capabilities (and cost) of erbium doped fiber amplifiers (EDFAs), which are effective for wavelengths between approximately 1525–1565 nm (C band), or 1570–1610 nm (L band). EDFAs were originally developed to replace SONET/SDH optical-electrical-optical (OEO) regenerators, which they have made practically obsolete. EDFAs can amplify any optical signal in their operating range, regardless of the modulated bit rate. In terms of multi-wavelength signals, so long as the EDFA has enough pump energy available to it, it can amplify as many optical signals as can be multiplexed into its amplification band (though signal densities are limited by choice of modulation format). EDFAs therefore allow a single-channel optical link to be upgraded in bit rate by replacing only equipment at the ends of the link, while retaining the existing EDFA or series of EDFAs through a long haul route. Furthermore, single-wavelength links using EDFAs can similarly be upgraded to WDM links at reasonable cost. The EDFA's cost is thus leveraged across as many channels as can be multiplexed into the 1550 nm band.

DWDM can realize the multiplexing and demultiplexing between two communication channel, and available on ITU channel spacing of 100/200 GHz. It can expand the capacity of single fiber to achieve bidirectional communication, which can widely used in optical network upgrade and expansion, or introduce new comprehensive business etc.

DWDM Device Dense WDM - Features

·Low insertion loss
·Low PDL
·High channel isolation
·Excellent environmental reliability

DWDM Device Dense WDM - Applications

·WDM system
·CATV

DWDM Device Dense WDM - Specifications

DWDM Device Dense WDM - Dimension

5534: Φ5.5×34 mm

4225: Φ4.2×25 mm

DWDM Device Dense WDM - Ordering Information: SUN-CWDM-A-B-C-D-E