A phase stabilized quadruple OTDM multiplier for RZ/CS-RZ optical clock with an optical bandpass filter

We demonstrate a phase stabilized quadruple OTDM multiplier for RZ/CS-RZ optical clock. An optical bandpass filter (OBPF) was used to filter the desired sideband from the multiplier output, and the filtered output was used for the stabilization. 10 GHz optical clock was multiplied to 40 GHz with 17 dB undesired sideband suppression ratio.