Optical modulator

Details Optical modulator Optical modulator

2006-03-30

2008-08-05

Healy, Brian (Department: 2883)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

C385S011000, C385S003000, C385S008000, C398S053000, C398S098000, C398S099000, C398S100000, C398S101000

Reexamination Certificate

active

07409114

ABSTRACT:
An optical modulator using a thin plate including a portion having 20 μm or less thickness, capable of selecting a specific polarized wave from a light wave which propagates in an optical waveguide in the modulator without reduced productivity. The modulator includes an X-cut or Y-cut thin plate of a material having an electrooptic effect; an optical waveguide formed in a top or bottom surface of the plate; and a control electrode on the top surface of the plate to modulate light which propagates in the waveguide. An attenuating means which absorbs light having a specific polarization plane of a light wave which propagates in the waveguide is disposed in the vicinity of the waveguide. The attenuating means includes light absorbing members disposed at a gap L which is 0.5 to 2 times the mode-field diameter of the light wave which propagates in the waveguide with the waveguide interposed therebetween.

REFERENCES:
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patent: 6480639 (2002-11-01), Hashimoto et al.
patent: 6846428 (2005-01-01), Saulys et al.
patent: 7010230 (2006-03-01), Lee et al.
patent: 64-018121 (1989-01-01), None
patent: 10-133159 (1998-05-01), None
patent: 2003-215519 (2003-07-01), None

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