Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Optical fiber – waveguide – or preform
Patent
1995-08-01
1997-10-21
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Optical fiber, waveguide, or preform
264 401, 264235, B29D 1100, G02B 100, G02B 618, B29C 7100
Patent
active
056792913
ABSTRACT:
The method of fabricating an optical waveguide device of the present invention is applicable to an optical waveguide device having at least two asymmetric electrodes for applying an electric field to an optical waveguide formed on a substrate of a ferroelectric crystal. The method is characterized by that annealing at a high temperature is carried out for the substrate and the electrodes after the electrodes have been formed on the substrate. The annealing temperature is 100.degree. C. or over, for example. By carrying out such annealing, the operating characteristic of the optical waveguide device, the operating point of a Mach-Zehnder type optical modulator, for example, can be stabilized.
REFERENCES:
patent: 5074631 (1991-12-01), Hamano et al.
patent: 5404412 (1995-04-01), Seino et al.
patent: 5473711 (1995-12-01), Hakogi et al.
patent: 5526448 (1996-06-01), Naga et al.
Czaja Donald E.
Fujitsu Limited
Ruller Jacqueline A.
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