Electro-optical switch and modulator

Details Electro-optical switch and modulator Electro-optical switch and modulator

1978-09-06

1980-04-15

Evans, F. L.

350355, G02B 514

Patent

active

041981162

ABSTRACT:
An electrically controlled light switch, which can also be used as a light modulator in integrated optical circuits is disclosed. The coupling length of a directional coupler is modified by applying a voltage between two electrodes positioned upon two rectilinear parallel waveguides made of an electro-optical material and arranged on a common substrate, thus generating a field distribution crossing the two waveguides in opposite directions and resulting in opposite signed refractive index variations thereof.

REFERENCES:
patent: 3850503 (1974-11-01), Riseberg et al.
patent: 3883220 (1975-05-01), Taylor
patent: 3909108 (1975-09-01), Taylor
patent: 3964819 (1976-06-01), Auracher
Papuchon et al., "Electrically Switched Optical Directional Coupler: Cobra", Appl. Phys. Ltrs., vol. 27, No. 5, Sep., 1975, pp. 289-291.

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