US3662284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double discharge laser
Assignee: Department of National Defence
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Filing: 1970-08-20
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Granted: 1972-05-09
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Expires: 1990-08-20
Abstract
Abstract A transverse excitation system is disclosed in which a preliminary discharge between an auxiliary electrode and a main electrode is initiated prior to initiation of the main discharge. The preliminary discharge ionizes the gas adjacent the main electrode and reduces the probability of the onset of bright arc discharge, thus enhancing the efficiency of gas excitation.
Inventors
- 👤 Alexandre J Beaulieu
- 👤 Albert Laflamme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:36
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/09; H01S3/097; H01S3/0971; H01S3/09713
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A transverse excitation system for a high pressure molecular gas laser having a resonant cavity, a pair of main discharge electrodes extending longitudinally of said laser cavity, means including an auxiliary electrode adjacent one of said main discharge electrodes for developing a capaciTance between said auxiliary electrode and the main electrode not adjacent said auxiliary electrode, and means comprising a high voltage pulser connected between said main discharge electrodes and further comprising said capacitance developing means to initiate a discharge between said auxiliary electrode and said adjacent main discharge electrode to ionize the gas in the immediate vicinity of said adjacent main discharge electrode prior to initiation of a discharge between said main discharge electrodes.
Claim 2
Dependent Claim
115 words
A transverse excitation system for a high pressure molecular gas laser having a resonant cavity, a pair of main discharge electrodes extending longitudinally of said laser cavity, means including an auxiliary electrode adjacent one of said main discharge electrodes for developing a capaciTance between said auxiliary electrode and the main electrode not adjacent said auxiliary electrode, and means comprising a high voltage pulser connected between said main discharge electrodes and further comprising said capacitance developing means to initiate a discharge between said auxiliary electrode and said adjacent main discharge electrode to ionize the gas in the immediate vicinity of said adjacent main discharge electrode prior to initiation of a discharge between said main discharge electrodes.
Claim 3
Dependent Claim
17 words
A laser excitation system as defined in claim 1 wherein said capacitance developing means comprises a capacitor.
Claim 4
Dependent Claim
57 words
A system as defined in claim 1 wherein said auxiliary electrode is positioned on the side of said adjacent main electrode remote from the other main electrode, and said adjacent main electrode is provided with openings whereby said ionized gas in the immediate vicinity of said adjacent main electrode extends into the region between said main electrodes.
Claim 5
Dependent Claim
34 words
A system as defined in claim 3 wherein said main electrode adjacent said auxiliary electrode comprises a grid, and said auxiliary electrode is a solid bar insulated from said grid by a solid insulation.
References Cited (Backward Citations)
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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) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |