OPTICAL WAVEGUIDE ELEMENT

WIPO Patent Application WO/2006/051942

A1

An optical waveguide element comprising a plurality of photonic crystal regions (305) having holes (304) arranged cyclically, and optical waveguides (302) formed between a plurality of photonic crystal regions (305). A plurality of holes (304) adjacent to an optical waveguide (302) on the opposite sides of the waveguide (302) are arranged symmetrically with respect to the center axis extending along the wavegide direction of the optical waveguide (302). A plurality of refractive index compensation regions (303) are arranged cyclically along the waveguide direction in the optical waveguide (302) such that the equivalent refractive index of a portion held between each pair of holes (304) symmetrical with respect to the center axis is higher than those of other portions. When the radius of a hole (304) is r, the center-of-gravity position of each refractive index compensation region (303) is shifted along a waveguide direction from the middle point of a line connection the centers of holes (304) and exists between a position 0.45r away from the middle point in the waveguide direction and a position 0.25r away from the middle point in a direction opposite to the waveguide direction.

FURUYA HIROYUKI
ENOKIHARA AKIRA

PCT/JP2005/020836

May 18, 2006

November 14, 2005

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MATSUSHITA ELECTRIC IND CO LTD (JP)
FURUYA HIROYUKI
ENOKIHARA AKIRA

G02B6/12; G02B6/122

JP2005274843A	2005-10-06
JP2004046181A	2004-02-12
JP2001272555A	2001-10-05

Okuda, Seiji (10th Floor Osaka Securities Exchange Bldg., 8-16, Kitahama 1-chome, Chuo-ku, Osaka-sh, Osaka 41, JP)

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