Optical phase control of an optically injection-locked FET microwave oscillator

A simple technique is proposed and demonstrated for controlling the phase of an optically-injection-locked 7.2-GHz FET oscillator. The relative phase phi between the oscillator and the locking signal is adjusted by optically tuning the oscillator frequency. Locking characteristics described include locking bandwidth (2.6 MHz), phase tuning range (187 degrees ), phase modulation ( beta =0.69 at 500 kHz), and optical tuning (125 MHz).>