All-optical Clock Recovery from NRZ Data Based on Semiconductor Optical Amplifier
基于半导体光放大器的非归零信号时钟恢复

A scheme of all-optical clock recovery has presented based on a semiconductor optical amplifier(SOA) followed by a fiber grating filter and an actively mode-locked fiber ring laser with gain medium SOA.The clock recovery configuration consists of two parts.One is SOA followed by optical filter,which aim is to convert non-return-to-zero(NRZ) format to pseudo-return-to-zero(PRZ) format.The other is actively mode-locked fiber ring laser based on SOA,which is used to extract the signal clock of the converted PRZ signal.The all-optical clock recovery of NRZ signal with PRBS modulated at 10Gb/s is experimentally demonstrated.The operation principle and experimental results are discussed and analyzed.The experiments show that this scheme has many advantages such as simple structure,easy controlling and good output characters.