Mode transducer for optical wave guides

Details Mode transducer for optical wave guides Mode transducer for optical wave guides

1975-05-01

1976-09-14

Corbin, John K.

350 96C, G02B 514

Patent

active

039803929

ABSTRACT:
A mode transducer for use with a pair of optical wave guides for converting modes of different orders but of the same polarization to enable coupling between a first and second wave guide characterized by a coupling taper with a coupling structure arranged between the first and second wave guides with the coupling taper having an input thickness and a output thickness with the ratio of the opening angle of the mode at the input and the output of the taper being equal to the square of the ratio of the input and output thickness. In order to convert more than one mode for coupling between the first and second wave guides, the mode transducer may include a plurality of serially arranged tapers with each taper having a coupling structure and the wave guide receiving the coupled modes includes a segment of electro-optical material for each taper so that the phase of the coupled modes can be selectively changed to enable superimposition thereof.

REFERENCES:
patent: 3610727 (1971-10-01), Ulrich
patent: 3617109 (1971-11-01), Tien
patent: 3806226 (1974-04-01), Tien
Yajima "Dielectric Thin-Film Optical Branching Waveguide" Applied Physics Letters vol. 22, No. 12, June 1973, pp. 647-649.

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