Optical switching device

Details Optical switching device Optical switching device

1979-03-07

1981-12-08

Levy, Stewart J.

350 9618, 350 9620, G02B 516, G02F 100

Patent

active

043044603

ABSTRACT:
Respective end faces of two or more optical waveguides (23 to 29) are connected on one end face of a focussing rod lens (20) and a reflection means (21) having a reflection plane tilted with a specified angle (.alpha.) to the normal plane to the lens axis is disposed behind the other end face of the focussing rod lens (20) and angle of reflection plane of the reflection means (21) is varied by rotating the reflection means (21) around the lens axis (203) or by means of a piezo-electric driving device (30), thereby attaining selective switching of the waveguides (from 23 to selected one of 24 to 29) or varying the amount of rays to be transmitted through the waveguides (23 & 24 of FIG. 4), or thereby modulating the rays. By utilizing a semitransparent filter forming another tilted reflection plane, the amount of attenuation for different wavelength or connection of the waveguides are controlled separately.

REFERENCES:
patent: 3886544 (1975-05-01), Narodny
patent: 3937557 (1976-02-01), Milton
patent: 4111524 (1978-09-01), Tomlinson
patent: 4153330 (1979-05-01), Tomlinson
patent: 4208094 (1980-06-01), Tomlinson et al.
M. Nunoshita et al., "Optical Switch for Multimode Optical Fiber System" Optics Letts. vol. 4, No. 1, Jan. 1979.
Kaede et al., "Low-Loss Micro-Optic Switches" Proceedings of Optical Quantum Electronics QQE77-85, pp. 109-114, Dec. 1977.
Ohchi et al., "An Optimum Point of Magnetic Force Appl. for Optical Fiber Switch" Proc. of Optical Quantum Electronics QQE77-118, pp. 69-75, Mar. 1978.
M. Nunoshita et al., "Optical Switch for Multimode Optical Fiber" Proc. of Optical Quantum Electronics, QQE77-119, pp. 77-82, Mar. 1978.
W. Tomlinson et al., "Multiposition Optical-fibre Switch" Electronics Letts. vol. 15, No. 6, pp. 192-194, Mar. 1979.

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