ClariPhy Communications offers mixed signal, digital signal processing (MXSP) systems-on-chips (SoCs) for coherence optical networks. The company is specialized in the production of ICs and helps clients to gain expertise in accelerated time-to-market (TTM).
Cross phase modulation (XPM) remains as the major interference in metro and regional networks as the DWDM system featuring 40G DP-QPSK wavelengths is more often interfered with the adjacent 10 G channels that hinder optical spanning. ClariPhy realized that use of high gain FEC (forward error correction) can overcome this interference of XPM and the company focused on solving this problem by combining 40G coherent DP-QPSK and 10 G OOK channels in coherent optical networks.
ClariPhy joined with Cortina, a company specialized in offering XPM solutions and arrived at a polarization QPSK (DP-QPSK) coherent technology that enhances the fiber reach capacity of coherent optical networks.
Norm Swenson, chief technology officer, ClariPhy is happy with the deployment of 40 G coherent system onto the metro networks that can remove the XPM problem. ClariPhy’s CL4010 LightSpeed Coherent SoCs are mounted onto Cortina System’s CS600x and CS604x optical transport network (OTN) processors. Cortina’s OTN processors are capable of making FEC even to the 47 Gbps data transfer rate done by ClariPhy’s SoCs. The combined solution increases the signal-to-noise ratio by up to 3dB and in turn increases the rate of data transfer without the interference of any XPM.
Arun Zarabi, Vice President, Cortina Systems has commented on the XPM problem that is associated with the application of coherent technology in metro network. He reports that this problem is effectively addressed by their alliance with ClariPhy. Together, they worked with a major provider of metropolitan networking equipment to test the solution. They intend to release their test result titled, “Use of High Gain FEC to Counteract XPM in Metro Networks Combining 40G Coherent DP-QPSK and 10G OOK Channels,” at the IEEE Photonics Conference in Burlingame, CA that is scheduled to take place on 26 September 2012.
Source: http://www.clariphy.com