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US4259646A
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High energy KrCl electric discharge laser
Assignee: United States Department of Energy
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Filing: 1979-04-10
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Granted: 1981-03-31
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Expires: 1999-04-10
Abstract
Abstract A high energy KrCl laser for producing coherent radiation at 222 nm. Output energies on the order of 100 mJ per pulse are produced utilizing a discharge excitation source to minimize formation of molecular ions, thereby minimizing absorption of laser radiation by the active medium. Additionally, HCl is used as a halogen donor which undergoes a harpooning reaction with metastable Kr M * to form KrCl.
Inventors
- 👤 Robert C. Sze
- 👤 Peter B. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:58
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/14; H01S3/22; H01S3/223; H01S3/225
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
45 words
In a KrCl excimer laser, the improvement comprising: a KrCl lasing medium including HCl as a halogen donor; electric discharge means for exciting said lasing medium to minimize the formation of molecular ions such that high output energies are produced by said KrCl excimer laser.
Claim 2
Dependent Claim
45 words
In a KrCl excimer laser, the improvement comprising: a KrCl lasing medium including HCl as a halogen donor; electric discharge means for exciting said lasing medium to minimize the formation of molecular ions such that high output energies are produced by said KrCl excimer laser.
Claim 3
Dependent Claim
16 words
The laser of claim 1 wherein said lasing medium comprises: ˜0.15% HCl ˜10% Kr ˜89.85% He
Claim 4
Dependent Claim
16 words
The laser of claim 1 wherein said lasing medium comprises: ˜0.15% HCl ˜10% Kr ˜89.85% Ne
Claim 5
Dependent Claim
28 words
The laser of claim 1 wherein said electrical discharge means comprises a cable fed discharge system which produces a fast current rise time pulse in said lasing medium.
Claim 6
Dependent Claim
69 words
A high energy KrCl noble gas monohalide excimer laser comprising: an optical resonant cavity delimited by an energy abstracting means, a KrCl lasing medium containing HCl as a halogen donor, said KrCl lasing medium disposed within said optical resonant cavity; electrical discharge means for exciting said lasing medium to stimulate laser emission of KrCl and minimize formation of molecular ions and thereby minimize energy absorption by said lasing medium.
Claim 7
Dependent Claim
69 words
A high energy KrCl noble gas monohalide excimer laser comprising: an optical resonant cavity delimited by an energy abstracting means, a KrCl lasing medium containing HCl as a halogen donor, said KrCl lasing medium disposed within said optical resonant cavity; electrical discharge means for exciting said lasing medium to stimulate laser emission of KrCl and minimize formation of molecular ions and thereby minimize energy absorption by said lasing medium.
Claim 8
Dependent Claim
15 words
The laser of claim 5 wherein said KrCl lasing medium comprises HCl, Kr and He.
Claim 9
Dependent Claim
15 words
The laser of claim 5 wherein said KrCl lasing medium comprises HCl, Kr and Ne.
Claim 10
Dependent Claim
16 words
The laser of claim 5 wherein said electrical discharge means comprises a cable fed discharge system.
Claim 11
Dependent Claim
68 words
A high energy KrCl noble gas monohalide excimer laser comprising: an optical resonant cavity delimited by an energy abstracting means, a KrCl lasing medium containing HCl as a halogen donor, said KrCl lasing medium disposed within said optical resonant cavity; electrical discharge means for exciting said lasing medium to generate Kr M * to form KrCl* according to the reaction: Kr M *+HCl→KrCl*+H, wherein M denotes metastable Krypton.
Claim 12
Dependent Claim
68 words
A high energy KrCl noble gas monohalide excimer laser comprising: an optical resonant cavity delimited by an energy abstracting means, a KrCl lasing medium containing HCl as a halogen donor, said KrCl lasing medium disposed within said optical resonant cavity; electrical discharge means for exciting said lasing medium to generate Kr M * to form KrCl* according to the reaction: Kr M *+HCl→KrCl*+H, wherein M denotes metastable Krypton.
Claim 13
Dependent Claim
15 words
The laser of claim 9 wherein said KrCl lasing medium comprises HCl, Kr and He.
Claim 14
Dependent Claim
15 words
The laser of claim 9 wherein said KrCl lasing medium comprises HCl, Kr and Ne.
References Cited (Backward Citations)
US3991385A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |