Variable light controlling device and variable light...

Details Variable light controlling device and variable light... Variable light controlling device and variable light...

2007-03-02

2008-10-21

Healy, Brian (Department: 2883)

Optical waveguides

Directional optical modulation within an optical waveguide

Light intensity dependent

C385S001000, C385S002000, C385S003000, C385S004000, C385S008000, C385S009000, C385S014000, C385S039000, C385S040000, C385S129000, C385S140000, C372S092000, C372S093000, C372S094000, C372S095000, C372S096000, C372S097000, C372S098000, C372S099000, C372S109000

Reexamination Certificate

active

07440643

ABSTRACT:
A variable light controlling device comprising a substrate, an optical waveguide disposed on the substrate, a first heater and a second heater to change the optical waveguide's temperature is fabricated. And a total amount of the power supplied to the first and the second heater, or a total amount of heat emitted from both of the first and second heater, is maintained substantially constant. Then, the substrate is protected from temperature changes, thereby, stable and quick wavelength tuning operations are realized.

REFERENCES:
patent: 4720160 (1988-01-01), Hicks, Jr.
patent: 6636668 (2003-10-01), Al-hemyari et al.
patent: 2002/0076149 (2002-06-01), Deacon
patent: 2006/0072866 (2006-04-01), Mizuno et al.
patent: 62-100706 (1987-05-01), None
patent: 63-281104 (1988-11-01), None
patent: WO 2005/096462 (2005-10-01), None

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