Thin film type optical device

Details Thin film type optical device Thin film type optical device

1985-05-13

1987-11-10

Lee, John

350 9612, 350 9613, G02B 612

Patent

active

047053461

ABSTRACT:
A thin film type optical device comprises a substrate formed of lithium niobate crystal or lithium tantalate crystal, and a light waveguide path layer comprising protons introduced into the surface of the substrate and having a refractive index higher than that of the substrate. The absorption peak of the infrared absorption spectrum of OH radical by the protons in the light waveguide path layer exists in the range of wave number 3480 cm.sup.-1 to 3503 cm.sup.-1.

REFERENCES:
patent: 4037005 (1977-07-01), Phillips
patent: 4439265 (1984-03-01), Alferness et al.
patent: 4440468 (1984-04-01), Auracher et al.
patent: 4547262 (1985-10-01), Spillman, Jr. et al.
Jackel et al, "Variation in Waveguides Fabricated by Immersion of . . . ", Appl. Phys. Lett., vol. 41, No. 6, Sep. 1982, pp. 508-510.
Jackel et al, "Proton Exchange for High-Index Waveguides in LiNbO.sub.3 ", Appl. Phys. Lett., vol. 41, No. 7, Oct. 1982, pp. 607-608.
DeMicheli et al, "Independent Control of Index and Profiles in . . . ", Optics Letters, vol. 8, No. 2, Feb. 1983, pp. 114-115.

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