Optical control element

Details Optical control element Optical control element

2011-03-22

2011-03-22

Rojas, Omar (Department: 2874)

Optical waveguides

Temporal optical modulation within an optical waveguide

C385S002000

Reexamination Certificate

active

07912325

ABSTRACT:
There is provided an optical control element in which non-guided light is prevented from entering into an optical waveguide and which is excellent in optical properties, such as optical modulation properties. A media processor, such as a CD publisher, having a function as a media library.An optical control element includes: a substrate formed of a material having an electro-optical effect; and an optical waveguide formed on a top or bottom surface of the substrate. The optical waveguide has a modulation region b (s) and non-modulation regions a and c along the propagating direction of a light wave propagating through the optical waveguide. In the case when the modulation region is configured to include a single optical waveguide, propagation constants β0to β3of optical waveguides in the modulation region and the non-modulation region adjacent to each other are set to different values in the modulation region and the non-modulation region. In the case when the modulation region is configured to include a plurality of optical waveguides, a propagation constant of at least one of the optical waveguides in the modulation region is set to a value different from that in the non-modulation region.

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