JDSU released a 40G coherent (DP-QPSK) transponder for a broad range of high-speed optical networking applications. The JDSU 8500 series transponder integrates a wide range of optical components from JDSU, including an intradyne coherent receiver, tunable laser, and lithium niobate modulator. It also includes the latest mixed signal digital processing (MXSP) system-on-chip technology from ClariPhy. 
Coherent optical transmission increases both the reach and capacity of fiber networks, eliminating bulky and expensive optical dispersion compensation equipment while simplifying network management for network operators.
http://www.jdsu.com
