Patent USRE34327E successfully refreshed from Google Patents.
US4426705A
Expired / Lapsed
US
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Double electric discharge coaxial laser
Assignee: United States Department of the Air Force
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Filing: 1981-10-06
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Granted: 1984-01-17
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Expires: 2001-10-06
Abstract
Abstract A novel electrical discharge gas laser device is provided which comprises a pair of laser discharge cavity portions optically interconnected within a U-shaped optical resonant cavity, the laser cavity portions configured to intercommunicate and share a common power supply.
Inventors
- 👤 Donald F. Stevison
- 👤 Edmund J. Rolinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:47
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/02; H01S3/03; H01S3/06; H01S3/07; H01S3/073; H01S3/076
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
An electric discharge coaxial gas laser device, comprising: a. a generally U-shaped laser discharge tube defining a pair of juxtaposed laser discharge cavities; b. means defining a generally U-shaped optical resonant cavity and lasing axis within said discharge tube and coaxial with said discharge cavities; c. means for supplying gaseous laser medium to each said laser discharge cavity; d. means for exhausting said medium from each said laser discharge cavity; e. means for sustaining a laser discharge in each said laser discharge cavity; and f. means defining a chamber through which said laser discharge cavities intercommunicate near their respective centers, whereby the volume of said laser medium subject to discharge is substantially increased resulting in mutual reinforcement of the said laser discharges.
Claim 2
Dependent Claim
122 words
An electric discharge coaxial gas laser device, comprising: a. a generally U-shaped laser discharge tube defining a pair of juxtaposed laser discharge cavities; b. means defining a generally U-shaped optical resonant cavity and lasing axis within said discharge tube and coaxial with said discharge cavities; c. means for supplying gaseous laser medium to each said laser discharge cavity; d. means for exhausting said medium from each said laser discharge cavity; e. means for sustaining a laser discharge in each said laser discharge cavity; and f. means defining a chamber through which said laser discharge cavities intercommunicate near their respective centers, whereby the volume of said laser medium subject to discharge is substantially increased resulting in mutual reinforcement of the said laser discharges.
Claim 3
Dependent Claim
52 words
The gas laser device as recited in claim 1 wherein said means for supplying gaseous laser medium comprises a plurality of inlet ports annularly disposed around said resonant cavity near each end of each said juxtaposed laser discharge cavity, and said means for exhausting said medium is operatively connected to said chamber.
Claim 4
Dependent Claim
59 words
The gas laser device as recited in claim 1 wherein said means defining a generally U-shaped optical resonant cavity comprises a laser mirror at one end of said discharge tube, a laser output coupler at the other end of said discharge tube, and a pair of laser mirrors for optically folding said optical resonant cavity to said U shape.
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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |