Digital Coherent Receiver Technology for 100-Gb/s Optical Transport Systems

摘要

Digital coherent receivers are expected to be the most important building block of 100- Gb/s optical transport systems. As a platform for evaluating their real-time operational stability and thus helping to realize product-level reliability, Fujitsu Laboratories and Fujitsu have fabricated a test circuit to implement basic algorithms such as carrier phase recovery and optical frequency offset compensation. The experimental results showed an excellent bit error ratio performance that is only 1 dB away from the theoretical limit.