Stimulated brillouin scattering ring laser gyroscope

Details Stimulated brillouin scattering ring laser gyroscope Stimulated brillouin scattering ring laser gyroscope

1976-11-24

1979-06-26

McGraw, Vincent P.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 902, G01P 900

Patent

active

041591780

ABSTRACT:
A stimulated Brillouin scattering (SBS) ring laser gyroscope. The SBS laser gyroscope is fabricated from a single-mode optical fiber waveguide and is optically coupled to a laser to accommodate being pumped in two directions by laser radiation having sufficient energy to induce stimulated Brillouin scattering radiation (SBS). The apparatus includes means for extracting a portion of each of the SBS radiation from the single-mode optical fiber waveguide and superimposing the extracted portions to permit detection of a beat frequency therebetween. The beat frequency detected is indicative of the rate of angular rotation of the area circumscribed by the single-mode optical fiber waveguide. Means are provided to accommodate a significant reduction in the required laser pumping power.

REFERENCES:
patent: 3617927 (1971-11-01), Pohl
patent: 3714607 (1973-01-01), Cutler
patent: 4013365 (1977-03-01), Vali et al.

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