Optical waveguide material and optical waveguide

Details Optical waveguide material and optical waveguide Optical waveguide material and optical waveguide

2007-02-13

2007-02-13

Lee, John D. (Department: 2874)

Optical waveguides

Planar optical waveguide

C385S142000, C385S144000, C117S918000, C117S948000

Reexamination Certificate

active

10534635

ABSTRACT:
The invention provides an optical waveguide material whose refractive index can be tailored without changing the ratio of Ta and Nb. An optical waveguide of this invention comprising an under-clad layer1and a core2that is formed on the under-clad layer1and has a higher refractive index than that of the under-clad layer1is shown. For example, KTN (KTa1−xNbxO3) is used as the core2, and a material that is obtained by substituting at least one element selected from the group consisting of Zr, Hf, and Sn for a portion of one element of the constituent elements of KTN and has the same perovskite type crystal structure as KTN is used as the clad. The refractive index of KTN can be reduced considerably, and this controllability widens the degree of freedom in the design of optical waveguide devices.

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