Cavity length control apparatus for a multioscillator

Details Cavity length control apparatus for a multioscillator Cavity length control apparatus for a multioscillator

G - Physics

01

C

345/10

G01C 19/64 (2006.01) G01C 19/66 (2006.01)

Patent

CA 1298636

GCD-86-45 ABSTRACT An apparatus and method for controlling the length of a multioscillator cavity. A photodiode mixes a pair of beams rotating in the same direction, one of said beams being substantially left circularly polarized, and the other beam being substantially right circularly polarized. A local oscillator causes the mixed beams to be modulated. An amplitude demodulator demodulates the modulated beams. An error detecting device responds to the amplitude demodulators, and an active integrator integrates the detected error. A piezotransducer responds to the output of the integrator for controlling the length of the multioscillator cavity.

586058

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