Method and apparatus for the determination of the relative frequency offset between an input optical signal and a resonance frequency of an optical cavity

摘要

A method and apparatus for stabilizing the relative frequency offset between a laser and a resonant optical cavity is described. Detected spatial mode patterns excited in a coupled nearly confocal resonator are used to derive a correction signal for frequency offset. The method can be applied to stabilizing a diode-cavity pathlength for an optical feedback locked diode laser system.