80-GB all-optical serial-to-parallel convertor for QPSK signal based on cascaded phase modulators an

• 作 者: 孔德明 李岩 王慧 伍剑 林金桐
• 机 构: State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Post
• 出 处: Chinese Optics Letters
• 发表日期: 2012年11期
• 关键词: OTDM cascaded serial QPSK multiplexing quadrature converter utilizing keying sim

An all-optical serial-to-parallel converter(SPC) utilizing two cascaded phase modulators and optical bandpass filters(OBPFs) is experimentally investigated and applied to demultiplex an 80-GBd optical timedivision multiplexing(OTDM) return-to-zero(RZ) differential quadrature phase-shift keying(QPSK) signal.Two 40-GBd OTDM tributaries are error-free demultiplexed with a power penalty of approximately 4 dB in the worst case.With its advantages of compact structure,high speed,low power penalty,simultaneous two-tributary operation,and no assistance from a light source,the SPC has potential for use in future OTDM networks.However,the performance of the SPC still needs improvement.

An all-optical serial-to-parallel converter (SPC) utilizing two cascaded phase modulators and optical bandpass filters (OBPFs) is experimentally investigated and applied to demultiplex an 80-GBd optical timedivision multiplexing (OTDM) return-to- differential quadrature phase-shift keying (QPSK) signal.Two 40-GBd OTDM tributaries are error-free demultiplexed with a power penalty of approximately 4 dB in the worst case. With its advantages of compact structure, high speed, low power penalty, simultaneous two-tributary operation, and no assistance from a light source, the SPC has potential for use in future OTDM networks. Yet, the performance of the SPC still needs improvement.