Optical: systems and elements – Optical modulator – Having particular chemical composition or structure
Reexamination Certificate
2006-03-07
2006-03-07
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Optical modulator
Having particular chemical composition or structure
C359S322000
Reexamination Certificate
active
07009758
ABSTRACT:
The present invention intends to control DC drift phenomenon in a light control element having ridge structure, and to provide a light control element with high drive stability in a large area. The present invention has character that, in a light control element being equipped with a base plate that has an electrooptic effect, an optical guide and an electrode for modulation that are formed on said base plate, which has ridge structure, an anti-DC drift layer is installed on the surface of the above mentioned base plate where the optical guide is formed, and annealing treatment is performed after ridge processing.
REFERENCES:
patent: 6198855 (2001-03-01), Hallemeier et al.
patent: RE37809 (2002-07-01), Deacon et al.
patent: 6654512 (2003-11-01), Burns et al.
patent: 2003/0133638 (2003-07-01), Jin et al.
Hashimoto Yoshihiro
Ichikawa Junichiro
Shinriki Takashi
Yamamoto Futoshi
Chapman and Cutler LLP
Hanig Richard
Sugarman Scott J.
Sumitomo Osaka Cement Co. Ltd.
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