High-speed optical time-division multiplexed line- to base-rate clock recovery with an electro-optic phase locked loop

We present a simple and robust clock recovery technique which samples all OTDM channels, in which an electro-optic Mach Zehnder modulator (MZM) and a slow photodiode pair act as a phase detector driving a voltage-controlled oscillator (VCO) in a phase locked loop.