US4876692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave-pumped atomic gas laser
Assignee: United States Department of the Army
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Filing: 1982-03-26
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Granted: 1989-10-24
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Expires: 2002-03-26
Abstract
Abstract Apparatus and method for producing laser radiation from an element of a binary (or more complex) compound pumped by microwave energy. The energy causes the compound to dissociate and for the one element of the compound to go to its first excited state, this state being metastable. As the element emits radiation, it reverts to its ground state and recombines to form a compound (which may be the original compound) capable of being dissociated by the microwave energy and repeating the process.
Inventors
- 👤 Jenny Bramley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:46
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/22; H01S3/223; H01S3/09; H01S3/097; H01S3/0975
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A method of obtaining coherent optical or quasi-optical radiation from a chemical element whose first excited state is metastable, including the steps of: enclosing a solid compound containing said element in a gas-tight enclosure containing a buffer gas or mixture of gases; placing said enclosure in a microwave cavity and between laser mirrors; and pumping said compound with microwave radiation to dissociate the said element from the compound, whereby said element goes to its first excited state and whereby the optical or quasi-optical radiation is emitted by said element as it falls to its ground state and recombines with at least one element of said compound to form a compound which may be excited by the microwaves to again dissociate and to repeat the process.
Claim 2
Independent Claim
125 words
A method of obtaining coherent optical or quasi-optical radiation from a chemical element whose first excited state is metastable, including the steps of: enclosing a solid compound containing said element in a gas-tight enclosure containing a buffer gas or mixture of gases; placing said enclosure in a microwave cavity and between laser mirrors; and pumping said compound with microwave radiation to dissociate the said element from the compound, whereby said element goes to its first excited state and whereby the optical or quasi-optical radiation is emitted by said element as it falls to its ground state and recombines with at least one element of said compound to form a compound which may be excited by the microwaves to again dissociate and to repeat the process.
Claim 3
Independent Claim
112 words
A system for producing coherent optical or quasi-optical radiation comprising as the radiating element a solid compound containing at least an element whose first excited state is metastable, wherein said compound is enclosed in a gas-tight enclosure between laser mirrors and with a buffer gas or mixture of gases in the enclosure, and microwave pumping means for dissociating said compound such that said element goes to its first excited state and whereby the optical or quasi-optical radiation is emitted by said element as it falls to its ground state and recombines with at least one element of said compound to form a compound which may be again dissociated to repeat the process.
Claim 4
Independent Claim
112 words
A system for producing coherent optical or quasi-optical radiation comprising as the radiating element a solid compound containing at least an element whose first excited state is metastable, wherein said compound is enclosed in a gas-tight enclosure between laser mirrors and with a buffer gas or mixture of gases in the enclosure, and microwave pumping means for dissociating said compound such that said element goes to its first excited state and whereby the optical or quasi-optical radiation is emitted by said element as it falls to its ground state and recombines with at least one element of said compound to form a compound which may be again dissociated to repeat the process.
Claim 5
Dependent Claim
34 words
The system as set forth in claim 2 wherein said means for dissociating said compound is a microwave source coupled to a microwave cavity, and whereby said enclosure is contained in said microwave cavity.
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) | 1992-10-23 | 1993-04-24 | 1993-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-23 | 1997-04-24 | 1997-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-23 | 2001-04-24 | 2001-10-24 | $7700.00 | Window Closed / Lapsed |