Phase-locking of wide linewidth semiconductor lasers: the optical injection phase-lock loop

摘要

The first experimental results for a new architecture combining optical injection locking and phase-lock loop techniques, the optical injection phase-lock loop (OIPLL), are reported. Phase error variance values as low as 0.006 rad~2 (500 MHz bandwidth) and locking ranges exceeding 26 GHz are achieved using DFB lasers of summed linewidth 36 MHz with loop delay of 15 ns and injection ratio less than -30 dB.