Open loop thin film laser gyro

Details Open loop thin film laser gyro Open loop thin film laser gyro

1984-04-25

1987-06-23

Buczinski, Stephen C.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01B 902, H01S 3083

Patent

active

046748814

ABSTRACT:
The laser gyro includes a laser and a ring resonator. Apparatus is provided for coupling counter-propagating beams of light from the laser into the resonator. The frequency of the laser is scanned across the resonance frequency of the resonator in steps superimposed on a dc level. The intensity of light in one of the counter-propagating beams is detected during each of the steps and the difference in intensity of the detected light is determined. The difference in the intensity of the detected light is used to alter the dc level of the steps so as to drive the difference to zero. The intensity of light in the other of the counter propagating beams is detected during each of the steps and the difference in intensity is also detected. This difference is indicative of the rotation rate of the gyro.

REFERENCES:
patent: 3890047 (1975-06-01), Warner
patent: 4326803 (1982-04-01), Lawrence

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