USRE31057E
Expired / Lapsed
US
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Chromium-doped beryllium aluminate lasers
Assignee: Honeywell International Inc
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Filing: 1978-12-06
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Granted: 1982-10-12
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Expires: 1998-12-06
Abstract
Abstract Single crystals of chromium-doped beryllium aluminate find advantageous use in optical applications and, in particular, in lasers capable of operating at room temperature.
Inventors
- 👤 Robert C. Morris
- 👤 Carl F. Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:20
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/16; H01S3/1601; H01S3/162; H01S3/1623; H01S3/163; H01S3/1631; H01S3/1633
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
93 words
In a laser capable of operating at room temperature comprising: a. a laser host comprising at least one single crystal incorporating a dopant; and b. means for exciting atoms of the dopant to emit coherent radiation, the improvement which comprises utilizing as the laser host, a single crystal of beryllium aluminate (BeAl 2 O 4 ) doped with trivalent chromium ions, the single crystal being crystallographically oriented substantially along the a-c plane, at least 30° removed from the b-axis, and having a chromium doping concentration ranging from about 0.005 to 1.0 atom percent.
Claim 2
Dependent Claim
93 words
In a laser capable of operating at room temperature comprising: a. a laser host comprising at least one single crystal incorporating a dopant; and b. means for exciting atoms of the dopant to emit coherent radiation, the improvement which comprises utilizing as the laser host, a single crystal of beryllium aluminate (BeAl 2 O 4 ) doped with trivalent chromium ions, the single crystal being crystallographically oriented substantially along the a-c plane, at least 30° removed from the b-axis, and having a chromium doping concentration ranging from about 0.005 to 1.0 atom percent.
Claim 3
Dependent Claim
22 words
The laser of claim 1 in which the single crystal of chromium-doped beryllium aluminate is crystallographically oriented substantially in the a-c plane.
Claim 4
Dependent Claim
20 words
The laser of claim 1 in which the concentration of chromium doping ranges from about 0.01 to 0.10 atom percent.
Claim 5
Dependent Claim
21 words
A laser according to claim 1, further comprising an optical resonant cavity for supporting coherent radiation emitted by the laser host.
References Cited (Backward Citations)
US3866142A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |