Ring laser gyroscopes

Details Ring laser gyroscopes Ring laser gyroscopes

1983-08-25

1986-12-30

Willis, Davis L.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

372 94, G01C 1964

Patent

active

046325557

ABSTRACT:
A ring laser gyroscope has a primary ring 13 including a gas discharge tube 4 enclosing an active lasing medium. The gyroscope has additionally a secondary, passive ring 14 optically coupled to the primary ring 13 by a partially transmissive mirror 8. A mirror 15 of the secondary ring 14 is adjustable, under the control of a feedback loop 19, to vary the optical path length of the secondary ring 14 so that the latter resonates at one of the longitudinal modes of the primary ring 13, thereby enhancing this mode and concentrating the output power of the gyroscope in one frequency, while suppressing other longitudinal modes of the primary ring.

REFERENCES:
patent: 3411849 (1968-11-01), Aronowitz
patent: 3503005 (1970-03-01), Mocker
patent: 3537027 (1970-10-01), Smith
patent: 3575667 (1971-04-01), Smith
patent: 3644841 (1972-02-01), Smith
patent: 4013365 (1977-03-01), Vali et al.
patent: 4267478 (1981-05-01), Ljung et al.
patent: 4271397 (1981-06-01), Stiles et al.
patent: 4473297 (1984-09-01), Simpson et al.
patent: 4556319 (1985-12-01), Gauert et al.

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