All-optical NRZ-DPSK clock recovery using chromatic-dispersion-induced clock tone

作者：Fu Songnian^*; Tang M; Zhong Wen De; Wen Yang Jing; Shum P

来源：IEEE Photonics Technology Letters, 2007, 19(9-12): 925-927.

DOI：10.1109/LPT.2007.897562

• chromatic dispersion (CD)
• clock recovery (CR)
• nonreturn-to-zero differential phase-shift keying (NRZ-DPSK)
• semiconductor optical amplifier (SOA)

All-optical clock recovery (CR) from 10-Gb/s nonreturn-to-zero differential phase-shift-keying (NRZ-DPSK) signal is demonstrated experimentally by introducing the chromatic-dispersion-induced clock tone into a free-running semiconductor optical amplifier (SOA)-based fiber ring laser for achieving mode-locking. Since no special component is required for NRZ-DPSK demodulation, our proposed method is very promising because of its simple configuration and better stability. The good performance of our proposed configuration is fulfilled with a 20-km standard single-mode fiber to regenerate clock tone of the NRZ-DPSK signal. The recovered clock signal with the extinction ratio of 17 dB and the root-mean-square timing jitter of 718 fs is achieved under 2(31)-1 pseudorandom binary sequence NRZ-DPSK signals measurement.

• 出版日期2007-6
• 单位南阳理工学院