Simultaneous clock recovery and demultiplexing of a 320 Gb/s OTDM system using an optoelectronic oscillator based on cascaded MZM and PolM

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（5）
• 页码范围: 12-15
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.050602

摘要

An improved optoelectronic oscillator scheme for an optical time division multiplexing (OTDM) system based on cascaded Mach-Zehnder modulator (MZM) and polarization modulator (PolM) is experimentally investigated.The system can simultaneously realize clock recovery and demultiplexing.With the MZM working at peak point to generate return-to-zero-33 optical pulses and the PolM working as an equivalent intensity modulator,a high-quality clock signal with 35-fs timing jitter is extracted from the 160-GBaud OTDM-differential quaternary phase-shift keying signal.Narrow short optical switch gates (4 ps) are also generated to demultiplex 160-GBaud signals to 40-GBaud signals.Error-free performance is achieved with 2.4-dB power penalty in the worst case.