Patent US5274650A successfully refreshed from Google Patents.
US5274650A
Expired / Lapsed
US
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Solid state laser
Assignee: Hoya Corp
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Filing: 1991-12-27
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Granted: 1993-12-28
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Expires: 2011-12-27
Abstract
Abstract A solid state laser provided with a pair of mirrors constituting a laser resonator and a plurality of non-linear optical crystals placed between the pair of mirrors in such a manner to have an optical axis in common therewith and a pump source for irradiating pump light on the plurality of non-linear optical crystals. In the solid state laser, the non-linear optical crystals are operative to generate both of fundamental-wave laser light and harmonic laser light in response to the pump light.
Inventors
- 👤 Satoru Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/106; H01S3/108; H01S3/109; H01S3/05; H01S3/06; H01S3/07; H01S3/1095
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
182 words
A solid state laser comprising: a laser resonator having a pair of mirrors; a plurality of non-linear optical self-frequency-doubling crystals placed between the pair of mirrors so that the plurality of non-linear crystal have a common optical axis; and a pump source disposed longitudinally to an optical axis of said laser resonator and providing pump light to the plurality of non-linear optical crystals, each of the plurality of non-linear optical crystals generating both a fundamental-wave laser light and a harmonic laser light in response to the pump light, wherein a first crystallographic axis of each of the plurality of non-linear optical crystals is perpendicular to the common optical axis thereof including a progress direction of the fundamental-wave laser light propagating through the plurality of non-linear optical crystals and the first crystallographic axis of each non-linear optical crystal is rotated by 180° around the common optical axis in relation to the first crystallographic axis of an adjacent non-linear optical crystal, wherein a difference between the progress direction of the fundamental-wave laser light and a wave-surface progress direction of a cophasal-wave light are cancelled.
Claim 2
Dependent Claim
182 words
A solid state laser comprising: a laser resonator having a pair of mirrors; a plurality of non-linear optical self-frequency-doubling crystals placed between the pair of mirrors so that the plurality of non-linear crystal have a common optical axis; and a pump source disposed longitudinally to an optical axis of said laser resonator and providing pump light to the plurality of non-linear optical crystals, each of the plurality of non-linear optical crystals generating both a fundamental-wave laser light and a harmonic laser light in response to the pump light, wherein a first crystallographic axis of each of the plurality of non-linear optical crystals is perpendicular to the common optical axis thereof including a progress direction of the fundamental-wave laser light propagating through the plurality of non-linear optical crystals and the first crystallographic axis of each non-linear optical crystal is rotated by 180° around the common optical axis in relation to the first crystallographic axis of an adjacent non-linear optical crystal, wherein a difference between the progress direction of the fundamental-wave laser light and a wave-surface progress direction of a cophasal-wave light are cancelled.
Claim 3
Dependent Claim
18 words
The solid state laser according to claim 1, wherein a Q-switch element is placed in the laser resonator.
Claim 4
Dependent Claim
21 words
The solid state laser according to claim 1, wherein the plurality of non-linear optical crystals are accommodated in a transparent tube.
Claim 5
Dependent Claim
17 words
The solid state laser according to claim 3 wherein the transparent tube is a Ce-doped quartz tube.
Claim 6
Dependent Claim
29 words
The solid state laser according to claim 1, wherein the plurality of non-linear optical crystals are made of NYAB(Nd x Y 1-x Al 3 (BO 3 ) 4 ).
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) | 1996-12-27 | 1997-06-28 | 1997-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-27 | 2001-06-28 | 2001-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-27 | 2005-06-28 | 2005-12-28 | $7700.00 | Window Closed / Lapsed |