Optical crosspoint switch having mode-conversion facilities

Details Optical crosspoint switch having mode-conversion facilities Optical crosspoint switch having mode-conversion facilities

1977-07-25

1979-05-08

Corbin, John K.

350151, 350 9619, G02B 514, G02F 109

Patent

active

041533291

ABSTRACT:
A plurality of crossed input and output optical channels are arranged in coordinate fashion to define a crosspoint array. A pair of jointly operable mode switches are disposed in the respective channels that form each crosspoint. Operation of the mode switch on the input side of a selected crosspoint causes incident light energy to be converted from a first mode (e.g., the TE.sub.0 mode) to a second mode (e.g., the TM.sub.0 mode). When the so-converted mode reaches the crosspoint, a reflection-type filter transparent to the first mode reflects such second mode into the other channel, where it is then reconverted back to the first mode by the operated mode switch on the output side of the crosspoint. The overall assembly may be formed by thin-film techniques on a supporting substrate.

REFERENCES:
patent: 3870397 (1975-03-01), Dillon, Jr. et al.
patent: 3990776 (1976-11-01), Tseng
patent: 4032216 (1977-06-01), Henry
R. A. Soref, "Optical Switch Study", Sperry Research Center Report, #RADC-TR-75-3, Feb. 1975, pp. 17, 19, 43-46.

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