US3766492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser pumping system
Assignee: United States Department of the Army
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Filing: 1972-07-25
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Granted: 1973-10-16
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Expires: 1992-07-25
Abstract
Abstract A circuit for pumping laser materials that require relatively long pump pulses wherein a series of short, closely spaced pulses are provided that synthesize the conventional single rectangular pump pulse.
Inventors
- 👤 V Rosati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:44
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/0915; H01S3/092
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
121 words
A laser pumping circuit for a laser requiring a relatively long optical pump pulse period, comprising a laser pumping means, power supply means, first and second electronically controlled rectifiers, energy storage means, means for initiating first electrical pulses occurring at a selected pulse repetition rate, said first controlled rectifier being responsive to each said first electrical pulses for transferring energy from said power supply means to said energy storage means, means for initiating second electrical pusles each delayed by a preset time interval with respect to the corresponding first electrical pulses, said second controlled rectifier being responsive to said second elecTrical pulses for transferring at least a portion of the energy stored in said storage means to said laser pumping means.
Claim 2
Dependent Claim
121 words
A laser pumping circuit for a laser requiring a relatively long optical pump pulse period, comprising a laser pumping means, power supply means, first and second electronically controlled rectifiers, energy storage means, means for initiating first electrical pulses occurring at a selected pulse repetition rate, said first controlled rectifier being responsive to each said first electrical pulses for transferring energy from said power supply means to said energy storage means, means for initiating second electrical pusles each delayed by a preset time interval with respect to the corresponding first electrical pulses, said second controlled rectifier being responsive to said second elecTrical pulses for transferring at least a portion of the energy stored in said storage means to said laser pumping means.
Claim 3
Dependent Claim
20 words
A laser pumping circuit according to claim 1 wherein said storage means forms a portion of a resonant charging circuit.
Claim 4
Dependent Claim
27 words
A laser pumping circuit according to claim 2 wherein said transferred energy is supplied to said laser pumping means by way of an additional resonant charging circuit.
Claim 5
Dependent Claim
26 words
A laser pumping circuit according to claim 1 wherein said transferred energy is supplied to said laser pumping means by way of a resonant charging circuit.
Claim 6
Dependent Claim
17 words
A laser pumping circuit according to claim 1 further including means for pre-ionizing said laser pumping means.
Claim 7
Dependent Claim
19 words
A laser pumping circuit according to claim 5 wherein said pre-ionizing means is responsive to said second electrical pulses.
Claim 8
Dependent Claim
33 words
A laser pumping circuit according to claim 1 wherein said delay time interval is slightly greater than the time taken for said storage means to be fully charged from said power supply means.
Claim 9
Dependent Claim
20 words
A laser pumping circuit according to claim 1 wherein said delay time interval is less than the pulse repetition rate.
Claim 10
Dependent Claim
99 words
A laser pumping circuit according to claim 1 wherein said energy storage means includes first and second capacitive means, said first controlled rectifier means responding to said first electrical pulse for transferring energy from said power supply to one of said capacitive means and for transferring energy stored in the other of said capacitive means to said laser pumping means, and said second controlled rectifier means responding to said second electrical pulses for transferring energy from said power supply to said other capacitive means and for transferring energy stored in said one capacitive means to said laser pumping means.
Claim 11
Dependent Claim
17 words
A laser pumping circuit according to claim 9 further including means for pre-ionizing said laser pumping means.
Claim 12
Dependent Claim
20 words
A laser pumping circuit according to claim 9 wherein said storage means forms a portion of a resonant charging circuit.
Claim 13
Dependent Claim
27 words
A laser pumping circuit according to claim 11 wherein said transferred energy is supplied to said laser pumping means by way of an additional resonant charging circuit.
Claim 14
Dependent Claim
26 words
A laser pumping circuit according to claim 9 wherein said transferred energy is supplied to said laser pumping means by way of a resonant charging circuit.
Claim 15
Dependent Claim
17 words
A laser pumping circuit according to claim 13 further including means for pre-ionizing said laser pumping means.
Claim 16
Dependent Claim
39 words
A laser pumping circuit according to claim 9 wherein each of said controlled rectifier means includes a controlled rectifier connected in circuit with said power supply means and a controlled rectifier connected in circuit with said laser pumping means.
Claim 17
Dependent Claim
17 words
A laser pumping circuit according to claim 15 further including means for pre-ionizing said laser pumping means.
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) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |