Waveguide-type optical device

Details Waveguide-type optical device Waveguide-type optical device

1994-08-23

1995-12-26

Healy, Brian

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

385 14, 385 16, 385 40, 385 41, 385129, 385130, 385131, G02B 612

Patent

active

054795524

ABSTRACT:
In a waveguide-type optical device, two optical waveguides are formed in a substrate of LiNbO.sub.3 or LiTaO.sub.3. On the substrate and the two waveguides, a blocking layer is formed to block a diffusion of Li ions from the substrate. On the blocking layer, a buffer layer made from SiO.sub.2 is formed. Each of the electrodes, from which operation voltages are supplied, covers each coupling part of the two optical waveguides, respectively, via the blocking layer and the buffer layer.

REFERENCES:
patent: 4701008 (1987-10-01), Richard et al.
patent: 5050947 (1991-09-01), Kawashima et al.
patent: 5134681 (1992-07-01), Ratovelomanana et al.
patent: 5148507 (1992-09-01), Tanisawa
patent: 5185830 (1993-02-01), Nishimoto
patent: 5214724 (1993-05-01), Seino et al.
patent: 5303315 (1994-04-01), Granestrand
patent: 5339369 (1994-08-01), Hopfer et al.
patent: 5356523 (1994-10-01), Vannucci et al.
patent: 5371812 (1994-12-01), Nakamura
"DC Drift Phenomena in LiNbO.sub.3 Optical Waveguide Devices", Japanese Journal of Applied Physics, vol. 20, No. 4, Apr. 1981, by Syoji Yamada et al., pp. 733-737.

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