Patent US5759619A successfully refreshed from Google Patents.
US5759619A
Expired / Lapsed
US
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Method of manufacturing second harmonic generation device
Assignee: LG Electronics Inc
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Filing: 1996-12-24
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Granted: 1998-06-02
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Expires: 2016-12-24
Abstract
Abstract A method of adaptively varying and locking a wavelength of high power infrared laser diode for use in a blue laser using second harmonic generation. The method including the steps of: forming a pattern for forming a periodic domain inverted area on a substrate of a non-linear medium; performing proton-exchange and quick heat-treatment for the substrate on which the pattern is formed to thereby form the periodic domain inverted area having predetermined period and width; forming a straight optical waveguide and a segmented optical waveguide, in the direction perpendicular to the periodic domain inverted area; and vacuum-evaporating an insulating buffer layer on the substrate where the periodic domain inverted area and the straight and segmented optical waveguides are formed and forming a metal electrode on the insulating buffer layer on the upper portion of the segmented optical waveguide to thereby execute polishing end facet and AR coating.
Inventors
- 👤 Yong-Sung Jin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/3558; G02F1/37; G02F1/377; G02F1/3775
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A method of manufacturing a second harmonic generation device, comprising the steps of: forming a pattern for forming a periodic domain inversion area on a substrate of a non-linear material; performing proton-exchange and heat-treatment for said substrate on which said pattern is formed to thereby form said periodic domain inversion area having a predetermined period and width; forming a straight optical waveguide and a segmental optical waveguide, for forming an optical waveguide, in the direction perpendicular to said periodic domain inversion area; and forming an insulating buffer layer on said substrate where said periodic domain inversion area and said straight and segmental optical waveguides are formed, and forming a metal electrode on said insulating buffer layer on the upper portion of said segmental optical waveguide, and polishing an end facet, and anti-reflection coating.
Claim 2
Independent Claim
133 words
A method of manufacturing a second harmonic generation device, comprising the steps of: forming a pattern for forming a periodic domain inversion area on a substrate of a non-linear material; performing proton-exchange and heat-treatment for said substrate on which said pattern is formed to thereby form said periodic domain inversion area having a predetermined period and width; forming a straight optical waveguide and a segmental optical waveguide, for forming an optical waveguide, in the direction perpendicular to said periodic domain inversion area; and forming an insulating buffer layer on said substrate where said periodic domain inversion area and said straight and segmental optical waveguides are formed, and forming a metal electrode on said insulating buffer layer on the upper portion of said segmental optical waveguide, and polishing an end facet, and anti-reflection coating.
Claim 3
Dependent Claim
44 words
The method as claimed in claim 1, wherein said proton-exchange is performed by dipping said substrate into a benzoic acid or pyrophosphoric acid of 200°-300° C., and said heat-treatment is then executed below a Curie temperature, to thereby form said periodic domain inversion area.
Claim 4
Dependent Claim
44 words
The method as claimed in claim 1, wherein said proton-exchange is executed by dipping said substrate into a benzoic acid or pyrophosphoric acid of 200°-300° C., and said heat-treatment is then executed at 300°-400° C., to thereby form said straight and segmental optical waveguides.
Claim 5
Dependent Claim
23 words
The method as claimed in claim 1, wherein said insulating buffer layer is comprised of Al 2 O 3 or SiO 2 .
Claim 6
Dependent Claim
20 words
The method as claimed in claim 1, wherein said non-linear medium is comprised of LiTaO 3 or LiNbO 3 .
Claim 7
Dependent Claim
24 words
The method as claimed in claim 1, wherein said pattern for forming said periodic domain inversion area is comprised of chromium (Cr) or Ta.
Claim 8
Dependent Claim
22 words
The method as claimed in claim 1, wherein said pattern for forming said optical waveguide is comprised of chromium (Cr) or Ta.
Claim 9
Dependent Claim
23 words
The method as claimed in claim 1, wherein said pattern for forming said segmented optical waveguide has a period of about 2 m.
Claim 10
Dependent Claim
23 words
The method as claimed in claim 1, wherein said pattern for forming said periodic domain inversion area has a period of 3-4 m.
References Cited (Backward Citations)
US5380410A
Cited
US5393561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-01 | 2001-12-01 | 2002-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-01 | 2005-12-01 | 2006-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-01 | 2009-12-01 | 2010-06-02 | $7700.00 | Window Closed / Lapsed |