US 2002/0172488 A1 · Optical waveguide device and light source and optical apparatus using the same

Abstract

An optical waveguide device is provided that can reduce external interference noise. The optical waveguide device includes a substrate, an optical waveguide formed on the substrate, a periodic polarization inversion region formed on the optical waveguide, and an optical thin film formed in a portion of the optical waveguide. The optical waveguide (refractive index: N2) and the optical thin film (refractive index: N1) differ in refractive index dispersion, and the magnitude relationship between the refractive indexes is reversed depending on wavelength. The relationship N1>N2 is established for light having a shorter wavelength, while the relationship N2>N1 is established for light having a longer wavelength.

Claims46

Dependent claims

An optical waveguide device comprising:

a substrate;
an optical waveguide formed in the vicinity of a surface of the substrate;
and
an optical thin film formed in at least a portion of the optical waveguide or formed in contact with at least a portion of the optical waveguide,
wherein a plurality of guided waves with different wavelengths propagate in the optical waveguide, a portion of the guided waves that exits from the optical waveguide returns to the optical waveguide again, and the optical thin film prevents reflection of light returning to the optical waveguide from end faces of the optical waveguide or in the vicinity thereof.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/123,892Filed 16 Apr 2002

Priority

JP 2001-11867117 Apr 2001

Published

21 Nov 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

G11B 7/126
Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for…
G02B 6/122
Of the integrated circuit kind: basic optical elements, e.g. light-guiding paths
G02F 1/377
For second-harmonic generation: in an optical waveguide structure
G02B 2006/12126
Constructional arrangements: light absorber

Optical waveguide device and light source and optical apparatus using the same

Life of this patent

Optical waveguide device and light source and optical apparatus using the same

Life of this patent

Abstract

Claims46