US3986129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation of submicrosecond pulses in a long laser
Assignee: United States Department of the Air Force
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Filing: 1972-07-25
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Granted: 1976-10-12
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Expires: 1992-07-25
Abstract
Abstract A standard cavity, Q switched laser is used to initiate and sustain submicrosecond pulses in a long laser. Short pulses from the standard cavity laser are directed onto the remote reflector of a long laser and are then reflected back through the lasing material of the long laser. Properly timed activation of the long laser lasing material causes amplification and oscillation of the pulses in the long laser cavity. Beam expanding telescopes are used to focus the laser pulses on the long laser's remote reflector.
Inventors
- 👤 John A. Caffo
- 👤 Alexander A. Abela
- 👤 Theodore N. Ledbetter
- 👤 Darrell W. Joubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:22
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/10; H01S3/10084; H01S3/10092
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
A pulsed laser system comprising a long laser including a laser medium, a back reflector, a remotely located front reflector, and pump means adapted to stimulate said laser medium into emission, a pulsed control laser, said control laser being positioned to direct laser pulses emitted therefrom onto said remotely located front reflector, a timing circuit for coordinating pulsed operation of said control laser and activation of said long laser pump means, and an off-axis telescope disposed between said laser medium and said remotely located front reflector.
Claim 2
Dependent Claim
86 words
A pulsed laser system comprising a long laser including a laser medium, a back reflector, a remotely located front reflector, and pump means adapted to stimulate said laser medium into emission, a pulsed control laser, said control laser being positioned to direct laser pulses emitted therefrom onto said remotely located front reflector, a timing circuit for coordinating pulsed operation of said control laser and activation of said long laser pump means, and an off-axis telescope disposed between said laser medium and said remotely located front reflector.
Claim 3
Dependent Claim
25 words
A pulsed laser system as defined in claim 1 including a beam expanding telescope disposed between said control laser and said remotely located front reflector.
Claim 4
Dependent Claim
34 words
A pulsed laser system as defined in claim 2 wherein said timing circuit effects actuation of said long laser pump means during times when laser pulses traverse the laser medium of said long laser.
Claim 5
Dependent Claim
26 words
A pulsed laser system as defined in claim 3 wherein the laser medium of said long laser comprises series connected neodymium doped yttrium aluminum garnet rods.
Claim 6
Dependent Claim
18 words
A pulsed laser system as defined in claim 4 wherein said control laser comprises a nanosecond Q-switched laser.
References Cited (Backward Citations)
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US3416097A
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US3486129A
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US3506927A
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US3597695A
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US3733129A
Cited
US3736526A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |