US 2026/0219447 A1 · OPTICAL WAVEGUIDE DEVICE

Abstract

This optical waveguide device comprises a substrate made of glass having a uniform composition ratio. The substrate includes a base material portion and a refractive index changing portion. The refractive index changing portion has a refractive index different from the refractive index of the base material portion. The refractive index changing portion includes at least a pair of a refractive index decreasing portion and a refractive index increasing portion. The refractive index of the refractive index increasing portion is higher than the refractive index of the refractive index decreasing portion. The distance between the boundary between the refractive index decreasing portion and the refractive index increasing portion and a portion of the refractive index increasing portion where the intensity of propagating light is maximum is 5 μm or more.

Claims10

Dependent claims

An optical waveguide device comprising:

a substrate constituted by glass having a uniform composition ratio,
wherein the substrate includes a base portion and a refractive-index change portion having a refractive index differing from a refractive index of the base portion,
wherein the refractive-index change portion includes at least a pair of a refractive-index decrease portion and a refractive-index increase portion,
wherein a refractive index of the refractive-index increase portion is higher than a refractive index of the refractive-index decrease portion, and
wherein a distance from a boundary between the refractive-index decrease portion and the refractive-index increase portion to a portion in which intensity of propagating light is at its maximum in the refractive-index increase portion is 5 μm or more.

2 more elements

Dependencies are inferred from the claim text.

Optical waveguide device

Life of this patent

Optical waveguide device

Life of this patent

Abstract

Claims10