Patent US5835513A successfully refreshed from Google Patents.
US5835513A
Expired / Lapsed
US
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Q-switched laser system providing UV light
Assignee: Newport Corp USA
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Filing: 1997-01-08
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Granted: 1998-11-10
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Expires: 2017-01-08
Abstract
Abstract A diode pumped laser includes a high reflector and an output coupler defining a resonator. The resonator includes a gain medium and a Q-switch and produces a fundamental beam. A first non-linear crystal is positioned extra-cavity of the resonator along a path of the fundamental beam. The first non-linear crystal generates a second harmonic beam from the fundamental beam. The first non-linear crystal is critically phased matched. A second non-linear crystal is portioned extra-cavity of the resonator along a path of the fundamental beam and the path of the second harmonic beam. The second non-linear crystal produces a third harmonic beam. The second non-linear crystal is critically phased matched.
Inventors
- 👤 Jan-Willem Pieterse
- 👤 Alan B. Petersen
- 👤 Chris Pohalski
- 👤 Emily Cheng
- 👤 Randall Lane
- 👤 William L. Nighan, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:34
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; G; G02; G02F; G02F1/00; G02F1/35; G02F1/353; G02F1/3534; G02F1/37; G02F1/354; G02F2201/00; G02F2201/16
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
114 words
A diode pumped laser, comprising: a high reflector and an output coupler defining a resonator, the resonator including a gain medium and a Q-switch, wherein the resonator produces a fundamental beam; a first non-linear crystal positioned extra-cavity of the resonator and along a path of the fundamental beam, the first non-linear crystal generating a second harmonic beam from the fundamental beam, wherein the first non-linear crystal is critically phased matched; a second non-linear crystal portioned extra-cavity of the resonator and along a path of the fundamental beam and the path of the second harmonic beam, wherein the second non-linear crystal produces a third harmonic beam, wherein the second non-linear crystal is critically phased matched.
Claim 2
Dependent Claim
114 words
A diode pumped laser, comprising: a high reflector and an output coupler defining a resonator, the resonator including a gain medium and a Q-switch, wherein the resonator produces a fundamental beam; a first non-linear crystal positioned extra-cavity of the resonator and along a path of the fundamental beam, the first non-linear crystal generating a second harmonic beam from the fundamental beam, wherein the first non-linear crystal is critically phased matched; a second non-linear crystal portioned extra-cavity of the resonator and along a path of the fundamental beam and the path of the second harmonic beam, wherein the second non-linear crystal produces a third harmonic beam, wherein the second non-linear crystal is critically phased matched.
Claim 3
Dependent Claim
11 words
The laser of claim 1, wherein the first non-linear crystal LBO.
Claim 4
Dependent Claim
11 words
The laser of claim 2, wherein the second non-linear crystal LBO.
Claim 5
Dependent Claim
34 words
The laser of claim 3, wherein the first non-linear crystal has a cut of phi in a range of 5 to 10 degrees and theta is in a range of 85 to 90 degrees.
Claim 6
Dependent Claim
34 words
The laser of claim 3, wherein the second non-linear crystal has a cut of phi in a range of 85 to 90 degrees and theta is in a range of 42 to 47 degrees.
Claim 7
Dependent Claim
11 words
The laser of claim 1, wherein the second non-linear crystal LBO.
Claim 8
Dependent Claim
13 words
The laser of claim 1, wherein the gain medium is Nd:YVO 4 .
Claim 9
Dependent Claim
18 words
The laser of claim 1, wherein the resonator is Q-switched at repetition rates of 10 KHZ and greater.
Claim 10
Dependent Claim
36 words
The laser of claim 1, further comprising: an optical element positioned intermediate the first non-linear crystal and the second non-linear crystal, wherein the optical element modifies a walk-off between the fundamental and the second harmonic beams.
Claim 11
Dependent Claim
42 words
The laser of claim 9, wherein an efficiency of conversion from the fundamental beam to the second harmonic beam is less than a maximum efficiency of conversion to increase an efficiency of conversion from the fundamental beam to the third harmonic beam.
Claim 12
Dependent Claim
27 words
The laser of claim 10, wherein the efficiency of conversion from the fundamental beam to the second harmonic beam is in a range of 25 to 35%.
Claim 13
Dependent Claim
21 words
The laser of claim 10, wherein the efficiency of conversion from the fundamental beam to the second harmonic beam is 30%.
Claim 14
Dependent Claim
42 words
The laser of claim 1, wherein an efficiency of conversion from the fundamental beam to the second harmonic beam is less than a maximum efficiency of conversion to increase an efficiency of conversion from the fundamental beam to the third harmonic beam.
Claim 15
Dependent Claim
27 words
The laser of claim 13, wherein the efficiency of conversion from the fundamental beam to the second harmonic beam is in a range of 25 to 35%.
Claim 16
Dependent Claim
21 words
The laser of claim 13, wherein the efficiency of conversion from the fundamental beam to the second harmonic beam is 30%.
References Cited (Backward Citations)
US5274650A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
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