7-14 GHz optical phase-locked loop (OPLL) source module for use in coherent optical beamforming applications

The first reported optical phase-locked loop module has been designed and constructed for use in coherent optical beamforming systems. It has been implemented using micro-optics, wideband feedback electronics and custom diode lasers with a suitable FM response. The module has an LO tuning range of 7-14 GHz and a total phase error variance of 0.05 rad/sup 2/.