US3646476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsed gas ion laser
Assignee: COHERENT RADIATION LAB
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Filing: 1969-11-24
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Granted: 1972-02-29
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Expires: 1989-11-24
Abstract
Abstract A miniature pulsed gas ion laser constructed so that the discharge tube forms the optical resonator. Internal cavity reflectors require no adjustment after fabrication. TEMoo output is provided at a single wavelength.
Inventors
- 👤 Gerald C Barker
- 👤 Steven M Jarrett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:58
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09; H01S3/097; H01S3/02; H01S3/03
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
216 words
A pulsed gas ion laser comprising a. an elongated tube having a length which is greater than 65 millimeters and less than 50 cm. with an interior bore therein, b. a flat mirror mounted directly on and supported by one end of said tube, c. a spherical mirror mounted directly on and supported by the other end of said tube and having a radius of curvature which is approximately equal to and slightly greater than, the distance between said mirrors for producing TEMoo laser output from said tube, d. transmission means forming a part of one of said mirrors for transmitting a predetermined small percentage of light of a predetermined wavelength incident thereon to provide laser output from said mirror, e. an ionizable gas sealed in said tube, and f. electrode means in said tube including a cathode and anode establishing a discharge path in said tube which has a length along the axis of said spherical mirror which is between 40 and 60 times the effective diameter of said bore, g. a sputtered metal film positioned on the interior of said tube adjacent to and solely in the region of said cathode and an electrical conductor outside said tube adjacent to said metal film for applying a voltage differential between said cathode and said film.
Claim 2
Dependent Claim
216 words
A pulsed gas ion laser comprising a. an elongated tube having a length which is greater than 65 millimeters and less than 50 cm. with an interior bore therein, b. a flat mirror mounted directly on and supported by one end of said tube, c. a spherical mirror mounted directly on and supported by the other end of said tube and having a radius of curvature which is approximately equal to and slightly greater than, the distance between said mirrors for producing TEMoo laser output from said tube, d. transmission means forming a part of one of said mirrors for transmitting a predetermined small percentage of light of a predetermined wavelength incident thereon to provide laser output from said mirror, e. an ionizable gas sealed in said tube, and f. electrode means in said tube including a cathode and anode establishing a discharge path in said tube which has a length along the axis of said spherical mirror which is between 40 and 60 times the effective diameter of said bore, g. a sputtered metal film positioned on the interior of said tube adjacent to and solely in the region of said cathode and an electrical conductor outside said tube adjacent to said metal film for applying a voltage differential between said cathode and said film.
Claim 3
Dependent Claim
12 words
Apparatus according to claim 1 wherein said cathode is a cold cathode.
Claim 4
Dependent Claim
49 words
Apparatus according to claim 2 wherein said elongated tube includes a central portion having ends on which said mirrors are mounted and first and second arms connected to said central portion, said cathode and said film disposed in said first arm and said anode disposed in said second arm.
Claim 5
Dependent Claim
95 words
The apparatus of claim 1 characterized further by the inclusion of means for establishing electron discharge pulses between said anode and said cathode with said means comprising a. a first capacitor connected between said anode and said cathode, b. a step-up transformer having its secondary connected between said cathode and said conductor adjacent to said film, c. a second capacitor connected in series with the primary of said transformer between said anode and said cathode, and d. switch means for alternatively charging said capacitors and shorting said second capacitor across the primary of said transformer.
Claim 6
Dependent Claim
107 words
In a gas laser having a hollow body made of an electrical insulating material, a cathode inside said body with said cathode made of an electrically conductive material, and an anode in said body spaced apart from said cathode for conducting a discharge current through the hollow interior of said body, the improved means for starting said discharge current which comprises a film of said electrical material sputtered onto the interior surface of said body adjacent to and solely in the region of said cathode and an electrical conductor outside said body adjacent to said film for applying a voltage differential between said cathode and said film.
Claim 7
Dependent Claim
107 words
In a gas laser having a hollow body made of an electrical insulating material, a cathode inside said body with said cathode made of an electrically conductive material, and an anode in said body spaced apart from said cathode for conducting a discharge current through the hollow interior of said body, the improved means for starting said discharge current which comprises a film of said electrical material sputtered onto the interior surface of said body adjacent to and solely in the region of said cathode and an electrical conductor outside said body adjacent to said film for applying a voltage differential between said cathode and said film.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |