angchuan Li

20x224Gbps (56Gbaud) PDM-QPSK Transmission in 50GHz grid over 3040km G.652 fiber and EDFA only link Using Soft Output Faster than Nyquist Technology

We report 20×224Gbps PDM-QPSK in 50GHz grid over G.652 fiber and EDFA-only link. Using Soft Output Faster than Nyquist and 7% SDFEC, 4bit/s/Hz net spectral efficiency transmission over 3040km with 21dB span loss is achieved.

Optical performance monitoring in DSP-based coherent optical systems

We review the requirements for optical performance monitoring in high capacity DSP based coherent optical transmission systems. Recent proposed schemes for OSNR and CD monitoring for coherent systems are summarized.

40-Gbps OSSB DD-OFDM Signal over 80-km SSMF Transmission using an Integrated EML

In this paper, we experimentally demonstrated a 40 Gbps optical single sideband (OSSB) modulation, direct detection (DD) orthogonal frequency division multiplexing (OFDM) system over 80km standard single-mode fiber (SSMF) transmission using a cost-effective integrated electro-absorption modulated laser (EML)

Coherent OTDR used for fibre faults detection

We have demonstrated a coherent OTDR based on log-detector. The effect of laser linewidth and electrical filter bandwidth on coherent OTDR performance is theoretically analyzed and experimentally investigated.