Light modulation device

Details Light modulation device Light modulation device

2007-03-06

2011-10-04

Healy, Brian (Department: 2883)

Optical waveguides

Temporal optical modulation within an optical waveguide

Electro-optic

C385S014000, C385S001000, C385S132000

Reexamination Certificate

active

08031983

ABSTRACT:
The present invention is directed to provide a light modulation device capable of not only restricting the faint light propagating in the adhesive layer from being re-incident on the thin substrate but also increasing an adhesive strength of the thin substrate and the supplementing plate. The invention is characterized in a light modulation device having a thin substrate1made of material with an electro-optical effect and with a thickness of below 20 μm; an optical waveguide2formed on a surface of the thin substrate or the other surface thereof; and a modulation electrode3formed on the surface of the thin substrate and for modulating light passing through the optical waveguide, comprising: a supplementing plate5adapted to be bonded to the thin substrate via an adhesive layer4, wherein a bonding surface of the supplementing plate is formed as a rough surface10relative to a bonding surface of the thin substrate. A roughness of the rough surface is preferred to be over 1/10 of a wavelength of faint light propagating in the adhesive layer.

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