Multi-position optical fiber rotary switch

Details Multi-position optical fiber rotary switch Multi-position optical fiber rotary switch

1991-07-23

1992-05-19

Lee, John D.

Optical waveguides

With optical coupler

Movable coupler

359204, 359211, 359640, 359834, 385 26, 385 36, G02B 634

Patent

active

051154811

ABSTRACT:
A multiple port electromechanical optical fiber switch provides for the exchange redirection of one common optical path with one of several other optical paths through the switch. It is particularly useful when one standby laser transmitter must be quickly substituted for any single failed transmitter among a group of several actively operating transmitters. A single prism for exchanging the optical paths of two initially parallel beams by means of four refractions at their entry and exit points and at least two internal reflections per beam within the prism is set forth in modified rhombic form with two additional parallel facets that transmit undeflected in the deactivated position one of two beams so as to minimize required shift distance to the prism activated position where it exchanges the optical paths of both parallel beams.

REFERENCES:
patent: 4322126 (1982-03-01), Minowa et al.
patent: 4421383 (1983-12-01), Carlsen
patent: 4519670 (1985-05-01), Spinner et al.
patent: 4634239 (1987-01-01), Buhrer
patent: 4872737 (1989-10-01), Fukahori et al.
patent: 4973123 (1990-11-01), Lutzeler

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