Optical waveguide device and manufacturing method of the same
First Claim
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1. An optical waveguide device comprising:
- a glass substrate having a predetermined index of refraction, said glass substrate having opposite first and second surfaces;
a transparent monocrystalline dielectric substrate having an index of refraction larger than said glass substrate, said transparent monocrystalline dielectric substrate having opposite first and second surfaces;
said first surface of said glass substrate being directly bonded onto said first surface of said transparent monocrystalline dielectric substrate with coupling of hydrogen or hydroxyl group; and
an optical waveguide path formed in said transparent monocrystalline dielectric substrate, wherein light is confined by the difference of refractive indexes between said glass substrate and said transparent monocrystalline dielectric substrate.
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Abstract
An optical waveguide device comprises a first transparent dielectric substrate having a predetermined index of refraction and a predetermined coefficient of thermal expansion, and a second transparent dielectric substrate having the same index of refraction and coefficient of thermal expansion as the first transparent dielectric substrate. An intervening layer having an index of refraction smaller than the index of refraction of the first and second transparent dielectric substrates is interposed between the first and second transparent dielectric substrates. An optical waveguide path is formed in at least either of the first and second transparent dielectric substrates.
74 Citations
25 Claims
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1. An optical waveguide device comprising:
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a glass substrate having a predetermined index of refraction, said glass substrate having opposite first and second surfaces; a transparent monocrystalline dielectric substrate having an index of refraction larger than said glass substrate, said transparent monocrystalline dielectric substrate having opposite first and second surfaces; said first surface of said glass substrate being directly bonded onto said first surface of said transparent monocrystalline dielectric substrate with coupling of hydrogen or hydroxyl group; and an optical waveguide path formed in said transparent monocrystalline dielectric substrate, wherein light is confined by the difference of refractive indexes between said glass substrate and said transparent monocrystalline dielectric substrate. - View Dependent Claims (2, 3, 4)
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5. An optical waveguide device comprising:
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a glass substrate having a predetermined index of refraction, said glass substrate having opposite first and second surfaces; a transparent monocrystalline dielectric substrate having an index of refraction larger than said glass substrate, said transparent monocrystalline dielectric substrate having opposite first and second surfaces; said first surface of said glass substrate being directly bonded onto said first surface of said transparent monocrystalline dielectric substrate with coupling of oxygen and component atoms of said glass substrate and said transparent monocrystalline dielectric substrate; and an optical waveguide path formed in said transparent monocrystalline dielectric substrate, wherein light is confined by the difference of refractive indexes between said glass substrate and said transparent monocrystalline dielectric substrate. - View Dependent Claims (6, 7, 8)
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9. An optical waveguide device comprising:
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a glass substrate having a predetermined index of refraction, said glass substrate having opposite first and second surfaces; a transparent monocrystalline dielectric substrate having an index of refraction larger than said glass substrate, said transparent monocrystalline dielectric substrate having opposite first and second surfaces, said first surface of said transparent monocrystalline dielectric substrate having a non-monocrystalline intervening layer having an index of refraction smaller than said index of refraction of said transparent monocrystalline dielectric substrate; said first surface of said glass substrate being directly bonded onto an opposite surface of said non-monocrystalline intervening layer on said first surface of said transparent monocrystalline dielectric substrate with coupling of hydrogen or hydroxyl group; and an optical waveguide path formed at a portion adjacent to said non-monocrystalline intervening layer in said transparent monocrystalline dielectric substrate, wherein light is confined by the difference of refractive indexes among said glass substrate, said transparent monocrystalline dielectric substrate and said non-monocrystalline intervening layer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An optical waveguide device comprising:
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a glass substrate having a predetermined index of refraction, said glass substrate having opposite first and second surfaces; a transparent monocrystalline dielectric substrate having an index of refraction larger than said glass substrate, said transparent monocrystalline dielectric substrate having opposite first and second surfaces, said first surface of said transparent monocrystalline dielectric substrate having a non-monocrystalline intervening layer having an index of refraction smaller than said index of refraction of said transparent monocrystalline dielectric substrate; said first surface of said glass substrate being directly bonded onto an opposite surface of said non-monocrystalline intervening layer on said first surface of said transparent said first surface of said glass substrate being directly bonded onto an opposite surface of said non-monocrystalline intervening layer on said first surface of said transparent monocrystalline dielectric substrate with coupling of oxygen and component atoms of said glass substrate and said nonmonocrystalline intervening layer; and an optical waveguide path formed at a portion adjacent to said non-monocrystalline intervening layer in said transparent monocrystalline dielectric substrate, wherein light is confined by the difference of refractive indexes among said glass substrate, said transparent monocrystalline dielectric substrate and said non-monocrystalline intervening layer. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25)
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Specification