Temperature compensated fiber optic bypass switch

Details Temperature compensated fiber optic bypass switch Temperature compensated fiber optic bypass switch

1989-04-03

1990-07-03

Healy, Brian

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

350 9613, 350 9616, 350358, 25022714, G02B 626, H01J 516, G02F 111

Patent

active

049385542

ABSTRACT:
A variable refractive index device, such as a Bragg cell, is temperature stabilized by sensing ray path deviations of a secondary diffracted beam. Two photodetectors with centers offset from the exit position of the central ray of the beam at normal temperature operation receive light energy as a function of the deviation of this ray path from the normal position. Light in each fiber is detected to derive electrical signals that are utilized to establish a correction signal to a voltage controlled oscillator which varies the frequency thereof and compensates for the diffraction deviations caused by temperature variations.

REFERENCES:
patent: 4422154 (1983-12-01), Smithline et al.
patent: 4799777 (1989-01-01), Edouard et al.
patent: 4824200 (1989-04-01), Isono et al.

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