ARRAY WAVEGUIDE GRATING ELEMENT

Japanese Patent JP3960399

B2

PROBLEM TO BE SOLVED: To provide an array waveguide grating element independent of polarization in an extensive wavelength range by setting the difference in the polarization dependency of the equivalent refractive index of a slab waveguide by the specified formula.
SOLUTION: An array waveguide grating element comprises an array waveguide circuit having a first slab waveguide to which one or more input waveguides are connected, and a second slab waveguide to which one or more output waveguides are connected on each end of an array waveguide. In order to eliminate the wavelength dispersion of the polarization dependency of the array waveguide, the difference in the equivalent refractive index between the TE mode and the TM mode of a slab waveguide is set by a formula. The light incident from the input waveguide is diffracted by the first slab waveguide, and branched into the array waveguide. The light outgoing to the second slab waveguide from the array waveguide is diffracted, and interfered with each other, and converged on a second end lace of the second slab waveguide according to the wavelength. The polarization dependency of the equivalent refractive index is increased to more effectively eliminate the wavelength dispersion.

JPS62121409	OPTICAL MODULE
JPH03225325	LIGHT GUIDE PARTS OF SEMICONDUCTOR
JP2000147277	OPTICAL MODULE

Masaki Shintoku
Hiroaki Sanjo
Yuzo Yoshikuni

JP27399797A

August 15, 2007

October 07, 1997

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Nippon Telegraph and Telephone Corporation

G02B6/12; (IPC1-7): G02B6/12

JP9105826A

Hiroshi Matsumoto
Toshiro Mitsuishi
Yasuyuki Tanaka

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