Patent US4580268A successfully refreshed from Google Patents.
US4580268A
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Cryogenic infrared laser in deuterium
Assignee: United States Department of the Army
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Filing: 1982-12-03
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Granted: 1986-04-01
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Expires: 2002-12-03
Abstract
Abstract A cryogenic infrared laser in deuterium in which an output is produced by exciting the deuterium after it has been cooled to cryogenic temperature with a high voltage pulse discharge to produce laser action in three or more lines as output pulses with varying lengths and with wavelengths in the 4 μm band and including 4.52 μm, 4.60 μm, and 4.71 μm.
Inventors
- 👤 Thomas A. Barr, Jr.
- 👤 William E. McCracken
- 👤 William B. McKnight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:51
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
123 words
An infrared laser in deuterium which lases in some lines of the 4 μm band and is produced by applying a high voltage pulse electric discharge means along a low loss laser cavity means, said laser cavity means containing deuterium, means for cooling said deuterium in said laser cavity means to cryogenic temperature and at a pressure between about 1 and 8 Torr, reflective cavity mirrors in opposite ends of the cavity and one of said cavity mirrors having an output thereat, whereby the deuterium is caused to lase when a high voltage electric discharge pulse from said high voltage pulse electric discharge means is applied through said deuterium to produce laser output in said band at said cavity mirror having said output.
Claim 2
Dependent Claim
123 words
An infrared laser in deuterium which lases in some lines of the 4 μm band and is produced by applying a high voltage pulse electric discharge means along a low loss laser cavity means, said laser cavity means containing deuterium, means for cooling said deuterium in said laser cavity means to cryogenic temperature and at a pressure between about 1 and 8 Torr, reflective cavity mirrors in opposite ends of the cavity and one of said cavity mirrors having an output thereat, whereby the deuterium is caused to lase when a high voltage electric discharge pulse from said high voltage pulse electric discharge means is applied through said deuterium to produce laser output in said band at said cavity mirror having said output.
Claim 3
Dependent Claim
57 words
An infrared laser in deuterium as set forth in claim 1, wherein said high voltage electric discharge pulse has a current value from 100-1200A, a run voltage from 10-50 kV, and a discharge duration up to several μ sec to cause said laser output to occur along a multiplicity of lines producing output pulses with varying lengths.
Claim 4
Dependent Claim
24 words
An infrared laser in deuterium as set forth in claim 2, wherein said output has wavelengths including 4.52 μm, 4.60 μm, and 4.71 μm.
Claim 5
Dependent Claim
42 words
An infrared laser in deuterium as set forth in claim 1, wherein said high voltage pulse is applied to said deuterium by a Marx bank through a resistor to control the length of the current pulse applied by said high voltage pulse.
Claim 6
Dependent Claim
27 words
An infrared laser in deuterium as set forth in claim 1, wherein said cavity mirrors are aligned after said deuterium has been cooled to said cryogenic temperature.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |