US3668548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for providing continuously variable pump pulses
Assignee: Westinghouse Electric Corp
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Filing: 1968-06-26
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Granted: 1972-06-06
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Expires: 1988-06-26
Abstract
Abstract Described is an electric flash producing system wherein the period of the flash can be continuously and accurately varied. These flashes are used, for example, as a pumping light source for laser crystals. Also described is a system for producing single giant spikes or a controlled number of giant spikes by the use of laser rods formed from uranyl-sensitized neodymium glass.
Inventors
- 👤 Thaddeus A Osial
- 👤 Richard J Ravas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092; H01S3/10; H01S3/13; H01S3/131; H01S3/1312; H01S3/0912
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
In a system for producing a discrete number of output pulses of coherent light, the combination of a laser rod capable of producing spaced output light spikes when optically pumped, electrical energy storage means, lamp means for producing pulses of optical energy for optically pumping said laser rod, circuit means connecting said energy storage means to said lamp means for energizing the latter, controlled rectifier means connected in shunt with said lamp means for short-circuiting said energy storage means to thereby extinguish the optical energy from said lamp means when conduction is initiated in said controlled rectifier means, and means responsive to said coherent light output for firing said controlled rectifier means to thereby extinguish the optical energy from said lamp means.
Claim 2
Dependent Claim
122 words
In a system for producing a discrete number of output pulses of coherent light, the combination of a laser rod capable of producing spaced output light spikes when optically pumped, electrical energy storage means, lamp means for producing pulses of optical energy for optically pumping said laser rod, circuit means connecting said energy storage means to said lamp means for energizing the latter, controlled rectifier means connected in shunt with said lamp means for short-circuiting said energy storage means to thereby extinguish the optical energy from said lamp means when conduction is initiated in said controlled rectifier means, and means responsive to said coherent light output for firing said controlled rectifier means to thereby extinguish the optical energy from said lamp means.
Claim 3
Dependent Claim
43 words
The system of claim 1 wherein said lamp means is of the arc discharge type and further means are provided responsive to said output pulses of coherent light for counting said pulses and generating a control signal for selectively firing said controlled rectifier.
Claim 4
Dependent Claim
59 words
The system of claim 2 wherein said coherent light-responsive means is responsive to at least one of said coherent light pulses and comprises a counter, the output of the counter being connected to the gate electrode of said controlled rectifier means to fire the same after a predetermined number of coherent light pulses have been counted by the counter.
Claim 5
Dependent Claim
30 words
The system of claim 1 wherein said laser rod is of a solid-state material having a characteristic such that it generates a series of coherent output pulses when pumped optically.
References Cited (Backward Citations)
US3430159A
Cited
US3387177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |