Patent US4088616A successfully refreshed from Google Patents.
US5115512A
Expired / Lapsed
US
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Optical waveguide device and method of making the same
Assignee: Sumitomo Metal Mining Co Ltd
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Filing: 1990-10-04
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Granted: 1992-05-19
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Expires: 2010-10-04
Abstract
Abstract The optical waveguide device comprises an optical waveguide formed as a region having a high index of refraction on a surface or in an interior including the surface of a base plate made of a ferroelectric crystal, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal phase plate and having electrical conductance higher than that of the optical waveguide. The optical waveguide is formed by thermal diffusion or a chemical reaction. This optical waveguide device is affected little by the optical damage and can be manufactured easily.
Inventors
- 👤 Takumi Fujiwara
- 👤 Hiroshi Mori
- 👤 Takemi Kawazoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:30
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/10; G02B6/12; G02B6/13; G02B6/134; G02B6/1342
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
An optical waveguide device comprising a base plate made of a ferroelectric crystal having a, b and c crystallographic axes, an optical waveguide having a high index of refraction and formed on a portion of the base plate from the surface thereof to a predetermined depth, said waveguide having a transmission direction along the a or b axis of said base plate, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate and made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide.
Claim 2
Dependent Claim
101 words
An optical waveguide device comprising a base plate made of a ferroelectric crystal having a, b and c crystallographic axes, an optical waveguide having a high index of refraction and formed on a portion of the base plate from the surface thereof to a predetermined depth, said waveguide having a transmission direction along the a or b axis of said base plate, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate and made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide.
Claim 3
Dependent Claim
75 words
An optical waveguide device comprising an optical waveguide having a high index of refraction and formed to a predetermined height on a surface portion of a surface of a base plate made of a ferroelectric crystal, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate and made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide.
Claim 4
Dependent Claim
75 words
An optical waveguide device comprising an optical waveguide having a high index of refraction and formed to a predetermined height on a surface portion of a surface of a base plate made of a ferroelectric crystal, and a film covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate and made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide.
Claim 5
Dependent Claim
48 words
An optical waveguide device according to claim 1 or 2 wherein said base plate made of the ferroelectric crystal is a base plate made of LiNbO 3 crystal, said optical waveguide is made of either Ti or H + and said film is made of SiO 2 .
Claim 6
Dependent Claim
52 words
An optical waveguide device according to claim 1 or 2 wherein said base plate made of the ferroelectric crystal is a base plate made of LiNbO 3 crystal, said optical waveguide is made of either Ti or H + and said film is made of In x Sn 1-x O 2 .
Claim 7
Independent Claim
106 words
A method of making an optical waveguide device comprising the steps of: forming by thermal diffusion, a region having a high index of refraction in a space including a surface portion of a base plate made of a ferroelectric crystal having a, b and c crystallographic axes for constituting an optical waveguide having a transmission direction along the a or b axis of said base plate; and covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate with a film made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide region.
Claim 8
Independent Claim
106 words
A method of making an optical waveguide device comprising the steps of: forming by thermal diffusion, a region having a high index of refraction in a space including a surface portion of a base plate made of a ferroelectric crystal having a, b and c crystallographic axes for constituting an optical waveguide having a transmission direction along the a or b axis of said base plate; and covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate with a film made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide region.
Claim 9
Independent Claim
107 words
A method of making an optical waveguide device comprising the steps of: forming by a chemical reaction, a region having a high index of refraction in a space including a surface portion of a base plate made of a ferroelectric crystal having a, b and c crystallographic axes for constituting an optical waveguide having a transmission direction along the a or b axis of said base plate; and covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate with a film made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide region.
Claim 10
Independent Claim
107 words
A method of making an optical waveguide device comprising the steps of: forming by a chemical reaction, a region having a high index of refraction in a space including a surface portion of a base plate made of a ferroelectric crystal having a, b and c crystallographic axes for constituting an optical waveguide having a transmission direction along the a or b axis of said base plate; and covering the surface of said optical waveguide in the direction along the c axis of said crystal base plate with a film made of a highly transmissive substance having electrical conductance higher than that of said optical waveguide region.
Claim 11
Dependent Claim
52 words
A method of making an optical waveguide device according to claim 5 or 6 wherein said base plate made of ferroelectric crystal is a base plate made of LiNbO 3 crystal, said optical waveguide region is composed of either Ti or H + and said film is made of SiO 2 .
Claim 12
Dependent Claim
56 words
A method of making an optical waveguide device according to claim 5 or 6 wherein said base plate made of ferroelectric crystal is a base plate made of LiNbO 3 crystal, said optical waveguide region is composed of either Ti or H + and said film is made of In x Sn 1-x O 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |