Patent US3713043A successfully refreshed from Google Patents.
US3713043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas lasers with electrically-conductive plasma tube
Assignee: Yissum Research Development Co of Hebrew University of Jerusalem
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Filing: 1970-12-07
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Granted: 1973-01-23
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Expires: 1990-12-07
Abstract
Abstract Gas lasers are described in which the tube is of metal. In one embodiment, the tube is of metal for substantially the complete axial length thereof between the electrodes, the tube being insulated from and at a floating electrical potential with respect to the electrodes. In a second described embodiment, the tube is made of a plurality of metal sections each being of optimum length to provide optimum electron temperature for maximum power output and being insulated from the other sections and from the electrodes.
Inventors
- 👤 P Avivi
- 👤 F Dothan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:24
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/02; H01S3/03; H01S3/038; H01S3/0305; H01S3/04; H01S3/041
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A laser including a plasma tube confining therewithin a quantity of a gas capable of population inversion in an ionized condition, and at least two spaced electrodes producing an electrically-excited laser action within the tube, characterized in that said plasma tube, including its inner surface in contact with the confined gas, is electrically-conductive transversely and axially thereof continuously for substantially its complete axial length between said electrodes, said tube being insulated from said electrodes.
Claim 2
Dependent Claim
74 words
A laser including a plasma tube confining therewithin a quantity of a gas capable of population inversion in an ionized condition, and at least two spaced electrodes producing an electrically-excited laser action within the tube, characterized in that said plasma tube, including its inner surface in contact with the confined gas, is electrically-conductive transversely and axially thereof continuously for substantially its complete axial length between said electrodes, said tube being insulated from said electrodes.
Claim 3
Dependent Claim
17 words
A laser according to claim 1, further characterized in that said electrically-conductive tube is a metal tube.
Claim 4
Dependent Claim
43 words
A laser according to claim 2, further characterized in that said electrodes are annular in shape and are of the same diameter as and coaxial with said electrically-conductive tube, there being a coaxial, annular insulating spacer between each electrode and the electrically-conductive tube.
Claim 5
Dependent Claim
27 words
A laser according to claim 3, further characterized in that there are two anodes, one disposed at each end of said tube, and a cathode disposed therebetween.
Claim 6
Dependent Claim
24 words
A laser according to claim 1, further characterized in that it includes a cooling jacket disposed around and in contact with said electrically-conductive tube.
Claim 7
Dependent Claim
19 words
A laser according to claim 1, further characterized in that said electrically-conductive tube is provided with internal cooling ribs.
Claim 8
Dependent Claim
115 words
A laser comprising a plasma tube containing a gas and at least two spaced electrodes for producing an electrically-excited laser action within the tube, characterized in that said plasma tube is constituted of a plurality of tubular metal sections which are electrically-conductive in the transverse and axial direction including along their inner surfaces in contact with the gas, said sections having an internal bore diameter of at least 10 mm and each being of an optimum length to provide optimum electron temperature for maximum power output, and insulating spacers insulating said sections from each other and from said electrodes, said insulating spacers being sealed to said metal sections and electrodes to confine the gas therewithin.
Claim 9
Dependent Claim
115 words
A laser comprising a plasma tube containing a gas and at least two spaced electrodes for producing an electrically-excited laser action within the tube, characterized in that said plasma tube is constituted of a plurality of tubular metal sections which are electrically-conductive in the transverse and axial direction including along their inner surfaces in contact with the gas, said sections having an internal bore diameter of at least 10 mm and each being of an optimum length to provide optimum electron temperature for maximum power output, and insulating spacers insulating said sections from each other and from said electrodes, said insulating spacers being sealed to said metal sections and electrodes to confine the gas therewithin.
Claim 10
Dependent Claim
27 words
A laser according to claim 7, further characterized in that each of said electrically-conductive sections has a length of five to eight times said internal bore diameter.
Claim 11
Dependent Claim
100 words
A lAser comprising a plasma tube confining therewithin a quantity of a gas which is capable of population inversion in an ionized condition, and at least two spaced electrodes producing an electrically-excited laser action within the tube, characterized in that said plasma tube has an internal bore diameter of at least 10 mm and is constituted of at least one metal section electrically conductive transversely and axially thereof, including along its inner face in contact with the confined gas, and has a length of five to eight times said internal bore diameter, said electrically-conductive section being insulated from said electrodes.
Claim 12
Dependent Claim
100 words
A lAser comprising a plasma tube confining therewithin a quantity of a gas which is capable of population inversion in an ionized condition, and at least two spaced electrodes producing an electrically-excited laser action within the tube, characterized in that said plasma tube has an internal bore diameter of at least 10 mm and is constituted of at least one metal section electrically conductive transversely and axially thereof, including along its inner face in contact with the confined gas, and has a length of five to eight times said internal bore diameter, said electrically-conductive section being insulated from said electrodes.
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |