US4807244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chemical laser
Assignee: STATE OF ISRAEL ISRAEL ATOMIC ENERGY COMMISSION NUCLEAR RESEARCH CENTER NEGEV BEER SHEVA ISRAEL
•
Filing: 1987-03-30
•
Granted: 1989-02-21
•
Expires: 2007-03-30
Abstract
Abstract There are provided chemical lasers which provide pulsed radiation in the visible or near visible (denoted hereafter as short-wavelength) range. The novel pulsed short-wavelength chemical lasers are operated by detonating an explosive mixture which contains fuel and lasants, the detonation resulting in electronically excited molecules. Lasing can be brought about by energy transfer within such molecules, or by energy transfer from such excited molecules to other molecules or to atoms resulting in the desired short-wavelength laser emission. The lasers can be operated at high pulse energies.
Inventors
- 👤 Salman Rosenwaks
- 👤 Lawrence A. Levin
- 👤 David Chuchem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:26
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/095; H01S3/0951; H01S3/0953; Y; Y10; Y10S; Y10S372/00; Y10S372/701
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
140 words
A pulsed short-wavelength chemical laser comprising: introducing means for introducing an explosive fuel, the detonation of which by flash initiation results in the formation of first electronically excited molecules and the pulsed emission of short-wave light, either indirectly, by energy transfer from said first electronically excited molecules to other molecules or atoms to form second electronically excited molecules or atoms which lase to emit said short-wave light by electronic relation, or directly, said first electronically excited molecules lasing by electronic relaxation; a detonation chamber for receiving said explosive fuel from said introducing means; a detonation means for detonating, by flash initiation, explosive fuel in said detonation chamber; and a resonant cavity, in communication with said detonation chamber, for amplifying said pulsed emission of short-wave light resulting from detonation of said explosive fuel in said detonation chamber by said detonation means.
Claim 2
Dependent Claim
140 words
A pulsed short-wavelength chemical laser comprising: introducing means for introducing an explosive fuel, the detonation of which by flash initiation results in the formation of first electronically excited molecules and the pulsed emission of short-wave light, either indirectly, by energy transfer from said first electronically excited molecules to other molecules or atoms to form second electronically excited molecules or atoms which lase to emit said short-wave light by electronic relation, or directly, said first electronically excited molecules lasing by electronic relaxation; a detonation chamber for receiving said explosive fuel from said introducing means; a detonation means for detonating, by flash initiation, explosive fuel in said detonation chamber; and a resonant cavity, in communication with said detonation chamber, for amplifying said pulsed emission of short-wave light resulting from detonation of said explosive fuel in said detonation chamber by said detonation means.
Claim 3
Dependent Claim
17 words
A chemical laser according to claim 1, where the resonant cavity has shape of a supersonic nozzle.
Claim 4
Dependent Claim
19 words
A laser according to claim 2, where the resonant cavity is followed by an exit chamber for spent gases.
Claim 5
Dependent Claim
16 words
A laser according to claim 3, where the exit chamber contains a diffuser for pressure recovery.
Claim 6
Dependent Claim
16 words
A laser according to claim 1, where the detonation chamber is inside of said resonant cavity.
Claim 7
Dependent Claim
14 words
The laser of claim 1, further comprising said explosive fuel in said detonation chamber.
Claim 8
Dependent Claim
16 words
A laser according to claim 6, where the explosive fuel is provided in a predetermined quantity.
Claim 9
Dependent Claim
13 words
A laser according to claim 6, where the explosive fuel comprises an azide.
Claim 10
Dependent Claim
12 words
A laser according to claim 8, where the azide is lead azide.
Claim 11
Dependent Claim
33 words
A system according to claim 8, where the azide is an azide of copper, of an alkali metal, of Mg, Cd, Al, Ag, Hg, Fe, Bi or Mn, or of CO or NO.
Claim 12
Independent Claim
131 words
A method of producing a pulsed laser beam of short-wave light, comprising the steps of: introducing into a detonation chamber an explosive fuel, the detonation of which by flash initiation results in the formation of first electronically excited molecules and the pulsed emission of short-wave light, either indirectly, by energy transfer from said first electronically excited molecules to other molecules or atoms to form second electronically excited molecules or atoms which lase to emit said short-wave light by electronic relation, or directly, said first electronically excited molecules lasing by electronic relaxation; detonating, by flash initiation, said explosive fuel in said detonation chamber; and amplifying the pulsed emission of said short-wave light by said detonated explosive fuel in a resonant cavity to produce an amplified pulse laser beam of said short-wave light.
Claim 13
Independent Claim
131 words
A method of producing a pulsed laser beam of short-wave light, comprising the steps of: introducing into a detonation chamber an explosive fuel, the detonation of which by flash initiation results in the formation of first electronically excited molecules and the pulsed emission of short-wave light, either indirectly, by energy transfer from said first electronically excited molecules to other molecules or atoms to form second electronically excited molecules or atoms which lase to emit said short-wave light by electronic relation, or directly, said first electronically excited molecules lasing by electronic relaxation; detonating, by flash initiation, said explosive fuel in said detonation chamber; and amplifying the pulsed emission of said short-wave light by said detonated explosive fuel in a resonant cavity to produce an amplified pulse laser beam of said short-wave light.
References Cited (Backward Citations)
US3904985A
Cited
US4099142A
Cited
US4087765A
Cited
US4334199A
Cited
US4249143A
Cited
US4414671A
Cited
US4580267A
Cited
US4627066A
Cited
US4646311A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |