Optical waveguide modulator having a reduced D.C. drift

Details Optical waveguide modulator having a reduced D.C. drift Optical waveguide modulator having a reduced D.C. drift

1994-09-30

1996-06-11

Healy, Brian

Optical waveguides

Temporal optical modulation within an optical waveguide

385 2, 385 14, 385 15, 385 39, 385 40, 385 45, 385132, G02F 101, G02B 626

Patent

active

055264484

ABSTRACT:
An optical waveguide device usable as an optical wave-modulator and having a reduced DC drift includes a LiNbO.sub.3 substrate, an optical waveguide formed in a front surface portion of the substrate, a dielectric layer covering the front surface of the substrate and the optical waveguide surface, and an electrode system arranged on the dielectric layer, the dielectric layer comprising a matrix component consisting of an amorphous SiO.sub.2 and a doping element component consisting of Li and/or Nb; and having a refractive index lower than that of the amorphous SiO.sub.2 matrix free from the doping element component.

REFERENCES:
patent: 4206251 (1980-06-01), Chen
patent: 4704978 (1987-12-01), Jackel
patent: 4851079 (1989-07-01), Booth et al.
patent: 5122852 (1992-06-01), Chan et al.
patent: 5214724 (1993-05-01), Seino et al.
patent: 5339369 (1994-08-01), Hopfer et al.
Nonsymmetric Mach-Zehnder Interferometers Used as Low-Drive Voltage Modulators, appearing in Journal of Lightwave Tech., vol. 6, No. 8, Aug. 1988, by J. Jackel and J. Johnson.
Temperature dependence of dc drift of Ti:linbO.sub.3, etc. appearing in J. Appln. Phys., vol. 73 (1993) pp. 4162-4164, by H. Nagata and K. Kiuchi.
Optical Fiber Communication Conference, 1992 Technical Digest Series, vol. 5, by M. Seino et al.
Publication entitled "Possibility Of dc Drift Reduction of Ti:LiNbO.sub.3 Modulators Via Dry O.sub.2 Annealing Process", published Mar. 1994 in Applied Physics Letters, vol. 64, No. 10.

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