Optical control element

Details Optical control element Optical control element

2006-10-17

2006-10-17

Pak, Sung (Department: 2874)

Optical waveguides

Planar optical waveguide

C385S130000, C385S132000

Reexamination Certificate

active

07123804

ABSTRACT:
An optical control element is disclosed that can be made small and has a low loss, and is able to provide group speed control and wavelength dispersion of short light pulses. The optical control element is formed from a photonic crystal, and includes a first portion having a first refraction index in the photonic crystal, a second portion having a second refraction index lower than the first refraction index, and a refraction-index-distributed type defect wave guide. A difference effective refraction indexes between the first portion and the second portion near the refraction-index-distributed type defect wave guide, changing continuously or stepwise along a wave guiding direction of the refraction-index-distributed type defect wave guide.

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