Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1989-04-05
1996-02-27
Buczinski, Stephen C.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
372 94, G01B 902, H01S 3083
Patent
active
054953359
ABSTRACT:
Disclosed herein is an apertureless ring laser gyroscope which achieves higher order transverse mode suppression without the use or need for a restrictive aperture that can be a source of unwanted scatter. Such mode suppression is achieved by operating the ring laser gyroscope in a higher pressure range (from 12 to 18 torr) than the range normally considered for ring laser gyroscope operation. Through the mechanism of pressure broadening and mode competition, the lower order TEM.sub.00 mode remains the only transverse mode present in the optical cavity of the ring laser gyroscope.
REFERENCES:
patent: 4494873 (1985-01-01), Perimutter et al.
patent: 4519708 (1985-05-01), Perimutter et al.
patent: 4627732 (1986-12-01), Braun et al.
"Effect of Gain Saturation on the Oscillating Modes of Optical Mazers" by Fox and Li IEEE Journal of Quantum Electronics, vol. QE-2, No. 12, pp. 774-783 Dec. 1966.
Gas Lasers by Arnold L. Bloom (Copyright 1968 by John Wiley & Sons, Inc.) pp. 82.85.
Optical Electronics by Amnon Yariv (Copyright 1985 by CBS College Publishing pp. 140-143.
Buczinski Stephen C.
Kirk James F.
Litton Systems Inc.
Martine, Jr. Chester E.
Rish L. David
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