We report on a novel, efficient technique for all-optical clock recovery from RZ-OOK data signals based on spectral phase-only (all-pass) optical filtering. This technique significantly enhances both the recovered optical clock quality and energy efficiency in comparison with conventional amplitude optical filtering approaches using a Fabry-Perot filter. The proposed concept is validated through recovery of the optical clock from a 640 Gbit/s RZ-OOK data signal using a commercial linear optical waveshaper.
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机译：我们报告了一种新颖，有效的技术，用于基于仅频谱相位（全通）光学滤波的RZ-OOK数据信号全光时钟恢复。与使用Fabry-Perot滤波器的常规幅度光学滤波方法相比，该技术显着提高了恢复的光学时钟质量和能效。通过使用商用线性光波整形器从640 Gbit / s RZ-OOK数据信号中恢复光时钟来验证提出的概念。
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