Ultrahigh-speed clock recovery with phase lock loop based on four-wave mixing in a traveling-wave laser diode amplifier
Ultrahigh-speed clock recovery with phase lock loop based on four-wave mixing in a traveling-wave laser diode amplifier
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DOI：
10.1109/50.532012
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发表时间：
1996-08
影响因子：
4.7
通讯作者：
O. Kamatani;S. Kawanishi
中科院分区：
文献类型：
--
作者：
O. Kamatani;S. Kawanishi
提出了一种新的锁相环（PLL），并证明了从超高速时分复用（TDM）光信号的时钟恢复。行波激光二极管放大器（TW-LDA）被用作相位检测器，并且光信号与光时钟脉冲串之间的互相关分量被检测为在TW-LDA中生成的四波混频（FWM）信号。从TDM信号中提取定时时钟作为预定标度的电时钟，并且该预定标度的时钟直接从随机调制的TDM光信号中恢复。使用作为光信号与产生的FWM光中的短（<10 ps）6.3 GHz光时钟脉冲序列之间的互相关获得的定时比较输出，成功地从100 Gb/s信号中提取了预缩放的6.3 GHz时钟。与以前报道的增益调制方法的PLL的相位噪声的比较也被示出，并且在实验中也被认为是该PLL的Tbit/s操作的可能性。
A new phase lock loop (PLL) is proposed and demonstrated for clock recovery from an ultrahigh-speed time-division multiplexed (TDM) optical signal. A traveling-wave laser-diode amplifier (TW-LDA) is used as a phase detector, and the cross-correlation component between the optical signal and an optical clock pulse train is detected as a four-wave-mixing (FWM) signal generated in the TW-LDA. A timing clock from a TDM signal is extracted as a prescaled electrical clock, and this prescaled clock is directly recovered from a randomly modulated TDM optical signal. A prescaled 6.3 GHz clock is successfully extracted from a 100 Gb/s signal using the timing comparison output obtained as the cross-correlation between the optical signal and a short (<10 ps) 6.3 GHz optical clock pulse train in the generated FWM light. A comparison of the PLL phase noise with a previously reported gain modulation method is also shown, and the possibility of the Tbit/s operation of this PLL is also considered in the experiments.