Interferometric optical devices with phase conjugating mirrors i

Details Interferometric optical devices with phase conjugating mirrors i Interferometric optical devices with phase conjugating mirrors i

1982-04-08

1986-03-11

McGraw, Vincent P.

Optics: measuring and testing

By particle light scattering

With photocell detection

356350, G01B 902

Patent

active

045752451

ABSTRACT:
A laser radiation arrives at a separating plate, after which a first part of the radiation is applied to a fibre optic wound with N turns to end at a phase conjugating mirror which returns the radiation into the same fibre optic. The other part of the radiation, reflected by the plate, travels in a fibre optic defining another optical path, very close to the first, and wound in the opposite direction for N turns, terminating at the same phase conjugating mirror or at another mirror of the same type, which returns the incident wave through the same fibre optic. The state of interference, detected at the separating plate by a detector, represents any rotation of the gyrometer. The phase conjugating mirror or mirrors is or are advantageously defined by optically non-linear media energized by two plane pump waves and travelling in opposite directions but on a colinear basis.

REFERENCES:
patent: 4198162 (1980-04-01), Bjorklund et al.
patent: 4280764 (1981-07-01), Sica, Jr. et al.
patent: 4429393 (1984-01-01), Givliano
"Fiber-Optic Rotation Sensing with Low Drift" Ulrich, Optics Letters, vol. 5, #5, May 1980, pp. 173-175.
Journal of the Optical Society of America, vol. 70, No. 11, Nov. 1980 "Interferometry Using Conjugate-Wave Generation" by F. A. Hopf, pp. 1320-1323.
Optics Communications, vol. 31, No. 3, Dec. 1979 "Dynamic Interferometry and Differential Holography of Irregular Phase Objects Using Phase Conjugate Reflection" by A. E. Siegman, pp. 257-258.

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