,Preprocessing-Free All-Optical Clock Recovery from NRZ and NRZ-DPSK Signals Using an FP-SOA Based A

• 作 者: WANG Fei ZHANG Xin-Liang YU Yu XU En-Ming
• 机 构: School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400054“,”Wuhan N
• 出 处: 中国物理快报（英文版）
• 发表日期: 2011年6期

We demonstrate a simple scheme to perform all-optical clock recovery from the input nonretu-to-zero (NRZ) and nonretu-to-zero differential phase shifted keying (NRZ-DPSK) data, which are avoided using any pre- processing measures.A multi-quantum-well Fabry-Perot semiconductor optical amplifier plays the dual role of the data format converter and the clock recovery device.Using this scheme, a stable and low jitter 35.80-GHz optical clock pulse sequence is directly extracted out from the input NRZ or NRZ-DPSK data.This scheme has some distinct advantages such as simple device fabrication, transparence to data format, multiwavelength opera- tion, free preprocessing and convenient tuning.Potential powerful adaptability of this scheme is very important for next-generation optical networks, in which there exist various modulation formats and the used devices are required to be transparent to data formats.