Waveguide type optical device

Details Waveguide type optical device Waveguide type optical device

1991-12-09

1993-02-09

Ullah, Akm E.

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

385 11, G02B 610, G02B 530

Patent

active

051858231

ABSTRACT:
In a waveguide type optical device which has an optical waveguide and modulation electrodes for varying its refractive index, both formed in the top of a substrate and a ferroelectric crystal having a pyroelectric effect, the top of the crystal substrate being parallel to the direction of its spontaneous polarization, conductive films are formed in two surfaces of the crystal substrate which cross the direction of the spontaneous polarization. The conductive films are electrically interconnected to thereby prevent a change in the operating temperature characteristic of the optical device which is caused by the pyroelectric effect of the crystal substrate.

REFERENCES:
patent: 4778234 (1988-10-01), Papuchon et al.
patent: 4887878 (1989-12-01), Robinson et al.
patent: 4966431 (1990-10-01), Heismann
patent: 5050948 (1991-09-01), Hawkins, II et al.

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