Device employing a substrate of a material that exhibits the pyr

Details Device employing a substrate of a material that exhibits the pyr Device employing a substrate of a material that exhibits the pyr

1990-01-04

1992-10-06

Epps, Georgia Y.

Optical waveguides

Directional optical modulation within an optical waveguide

Electro-optic

385 1, 385 4, 385 14, 385130, 385131, 385132, G02B 612

Patent

active

051539306

ABSTRACT:
An article is manufactured from a substrate of a material that exhibits the pyroelectric effect by depositing a film containing a selected material in a first state over a front surface of the substrate. At least one electrode is formed on the film, portions of the film being exposed around the electrode. The exposed portions of the film are subjected to a treatment such that they are converted from the first state to a second state, in which the material has a resistivity that lies within a desired range of values.

REFERENCES:
patent: 4445751 (1984-05-01), Divens et al.
patent: 4766954 (1988-08-01), Bierlein et al.
patent: 4778236 (1988-10-01), Miyawaki
patent: 4799750 (1989-01-01), Miyawaki
patent: 4818063 (1989-04-01), Takizawa
patent: 4880288 (1989-11-01), Vatoux et al.
patent: 4925263 (1990-05-01), Sanford et al.
patent: 4976517 (1990-12-01), Kozuka et al.
C. H. Bulmer et l., "Pyroelectric Effects in LiNbO.sub.3 channel-waveguide devices", Appl. Phys. Lett., vol. 48 (16), 1036 (1986).
P. Skeath et al., "Novel electrostatic mechanism in the thermal instability of z-cut LiNbO.sub.3 interferometers", Appl. Phys. Lett., vol. 49 (19) 1221 (1986).
I. Sawaki et al., "Thermally stabilized z-cut Ti: LiNbO.sub.3 waveguide switch", Proceedings, Optical Fiber Communications Conference, 1987.

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