Optical modulator

Details Optical modulator Optical modulator

2007-10-30

2007-10-30

Kim, Ellen E. (Department: 2874)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

Reexamination Certificate

active

11474461

ABSTRACT:
In an optical modulator according to the present invention, a Mach-Zehnder optical waveguide is formed on a substrate having an electro-optic effect, a signal electrode and an earth electrode are disposed along a pair of branching waveguides of the optical waveguide, and an electric signal is applied on the signal electrode to thereby modulate a light being propagated through the optical waveguide. At this time, a first region and a second region are set in an interacting portion where the light and the electric signal interacts to each other, to form a polarization inversion region in each of the set regions, and also, an arrangement pattern of the signal electrode is determined so that a modulation direction in each of the set regions is opposite to each other. As a result, it is possible to realize the optical modulator of simple configuration capable of realizing simultaneously the broad modulation band and the wavelength chirping suppression.

REFERENCES:
patent: 5267336 (1993-11-01), Sriram et al.
patent: 6853758 (2005-02-01), Ridgway et al.
patent: 2005/0180694 (2005-08-01), Sugiyama et al.
patent: 2006/0029319 (2006-02-01), Sugiyama
patent: 2003-228033 (2003-08-01), None
patent: 2005-284129 (2005-10-01), None
patent: 2004/053574 (2004-06-01), None

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