Patent US3614663A successfully refreshed from Google Patents.
US3614663A
Expired / Lapsed
US
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Black-body-pumped laser
Assignee: Boeing North American Inc
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Filing: 1965-11-26
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Granted: 1971-10-19
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Expires: 1985-11-26
Abstract
Abstract The laser is submerged in a black body cavity, the black body being maintained at a temperature at which its radiations include the frequency spectrum required to pump the laser. In this arrangement, the laser absorbs-from this frequency spectrum-the frequencies required to pump it; and the unused black body radiations are reabsorbed by the black body cavity, to be later reradiated. Thus, they are not wasted; and a high-efficiency laser arrangement is produced.
Inventors
- 👤 Paul N Palanos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:21
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/02; H01S3/04; H01S3/042; H01S3/0404; H01S3/0407
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
The combination of claim 1 wherein said temperature-maintaining means comprises a heat-producing radioactive material.
Claim 2
Dependent Claim
17 words
The combination of claim 1 wherein said black-body radiation frequency spectrum peaks at substantally said given spectrum.
Claim 3
Dependent Claim
21 words
The combination of claim 1 including housing means containing a thermoinsulative material, for housing and minimizing heat loss from said combination.
Claim 4
Dependent Claim
137 words
The combination comprising: a tube closed at one end to provide a black-body cavity, and formed of a mixture containing thorium oxide; a heater coil on the thorium oxide tube, said heater coil heating said tube to produce a black-body radiation frequency spectrum; a coolant tube, substantially transparent to said black-body radiation frequency spectrum, positioned within the black-body cavity, and spaced therefrom, said tube being closed at one end and formed with a divider for directing coolant fluid through the coolant tube and from the other end thereof; a lasing material supported within the coolant tube, and spaced therefrom, said lasing body absorbing a given frequency spectrum of said black-body radiation frequency spectrum; a sleeve of refractory material circumscribing said tube and heater coil to minimize heat loss; and a housing, containing thermal-insulating material, enclosing said sleeve.
Claim 5
Dependent Claim
71 words
The combination comprising: a laser adapted to accept energy of a given frequency spectrum; and a laser-pumping arrangement, comprising a black-body cavity positioned circumjacent the laser, said pumping arrangement radiating to said laser, a black-body frequency spectrum that contains said given frequency spectrum, the unaccepted portion of said black-body frequency spectrum being reabsorbed by the walls of said black-body cavity to heat said walls and to provide a high-efficiency optical-pumping operation.
Claim 6
Dependent Claim
32 words
The combination of claim 6 including cooling means for preventing said laser from overheating, said cooling means comprising a fluid coolant that does not absorb any appreciable energy i said given spectrum.
Claim 7
Dependent Claim
101 words
The combination comprising: a lasing material adapted to absorb radiation in a given frequency spectrum; means, comprising a tube for providing a black-body cavity; heating means for heating said tube to produce a black-body radiation frequency spectrum containing said given frequency; a coolant tube- containing a coolant fluid, said tube and fluid being substantially transparent to said given frequency spectrum- positioned within the black-body cavity, and spaced therefrom, said coolant tube being closed at one end, and containing means for directing coolant fluid through the coolant tube; and means for positioning said lasing material within, and spaced from, said Coolant tube.
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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |