Patent US3675156A successfully refreshed from Google Patents.
US3675156A
Expired / Lapsed
US
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Laser pump cavity with conical geometry
Assignee: AT&T Inc
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Filing: 1971-02-25
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Granted: 1972-07-04
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Expires: 1991-02-25
Abstract
Abstract There is disclosed an optically pumped laser employing a pump cavity including two facing internally reflective conical elements within which an elongated laser element and an elongated pump lamp are respectively axially oriented. Typically, an internally-reflective cylindrical element connects the two conical elements. As compared to prior pump cavities, this cavity provides superior fundamental transverse mode operation and simplified fabrication.
Inventors
- 👤 Hans Guenter Danielmeyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:06
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/093; H01S3/0931; H01S3/02; H01S3/04; H01S3/042; H01S3/0407
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
83 words
A device for the stimulated emission of coherent radiation, comprising an elongated active element including a medium capable of said stimulated emission, an elongated lamp for pumping said element, said lamp being separated from and aligned along a common axis with said element, means for stimulating the emission of coherent radiation from said element under conditions of pumping of said element, and a pump radiation cavity includinG facing conical reflectors respectively disposed about said lamp and said element and aligned on said axis.
Claim 2
Independent Claim
83 words
A device for the stimulated emission of coherent radiation, comprising an elongated active element including a medium capable of said stimulated emission, an elongated lamp for pumping said element, said lamp being separated from and aligned along a common axis with said element, means for stimulating the emission of coherent radiation from said element under conditions of pumping of said element, and a pump radiation cavity includinG facing conical reflectors respectively disposed about said lamp and said element and aligned on said axis.
Claim 3
Dependent Claim
14 words
A device according to claim 1 including a cylindrical reflector connecting said conical reflectors.
Claim 4
Dependent Claim
38 words
A device according to claim 2 including means for reflecting that portion of the radiation from said lamp which cannot be used for the pumping of the active medium by a semitransparent plate separating the two conical sections.
Claim 5
Dependent Claim
35 words
A device according to claim 1 in which the active element is a dielectric host containing neodymium ions and the conical sections include means for flowing a coolant through at least one of said sections.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |