Non-linear optical interferometer - contains electro-optical medium whose refractive index is modified by applied voltage

摘要

A non-linear interferometer comprises an interferometer cavity which receives linearly polarised optical energy at a particular frequency and provides optical energy at the output. A non-linear interferometer comprises an interferometer cavity (20) which contains an electro optical medium (21) whose refractive index is a function of an applied voltage (Ve. The output beam (26) from the cavity is applied to a beam divider (27) which directs part (29) of the beam to a photodetector (30). The photodetector output is amplified (31) to produce the voltage(V) to control the refractive index of the electro optic medium.