Ring laser gyro with an absorber medium with the laser cavity

Details Ring laser gyro with an absorber medium with the laser cavity Ring laser gyro with an absorber medium with the laser cavity

1990-06-28

1992-09-15

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01C 1966

Patent

active

051482371

ABSTRACT:
A ring laser gyro has an optical resonator (12), forming a loop- or ring-shaped beam cavity, a lasing medium (14) arranged in the resonator for furnishing, when stimulated, two laser oscillation pulses circulating in the resonator in opposing directions, and a device for measuring the change in frequency and/or wavelength of the laser oscillation pulses as a function of the rotation of the resonator. A saturable absorber (16) is arranged in the laser resonator for the purpose of fixing the standing wave resulting due to the laser oscillation pulses circulating in the opposing directions as regards the laser resonator. Rotation of the laser resonator changes the wavelengths of the laser oscillation pulses circulating in opposing directions. The change in wavelength and/or the difference in the frequencies of the laser oscillation pulses constitute a measure of the rotation rate. No effect making it difficult to measure low rotary speeds in known ring laser gyros occurs in the present ring laser gyro.

REFERENCES:
patent: 4429393 (1984-01-01), Giuliano
Alternative Interpretation of Rotation Rate Sensing by Ring Laser E. O. Slz-DuBois, Aug. 1966 Jour. of Quantum Electronics vol. QE2
"The Ring Laser Gyro" by W. W. Chow, J. Gea-Banacloche and Pedrotti Review of Modern Physics, vol. 57, No. 1, Institute for Modern Optics, Univ. of New Mex. Jan. 1985.

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