US3614657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical plasma laser
Assignee: Jeol Ltd
•
Filing: 1964-12-16
•
Granted: 1971-10-19
•
Expires: 1984-12-16
Abstract
Abstract An apparatus and method for obtaining high-power output oscillations from a gas laser by subjecting the gas to a magnetic field parallel to the axis of a tube containing the gas and to electromagnetic oscillations in a direction perpendicular to the longitudinal axis of the tube to produce a cylindrical plasma. The intensity of the magnetic field (H) and the frequency of the electromagnetic oscillations (f) being expressed by the general formula: f eH/2 pi mc. wherein e the electric charge of the gas particles, m the average mass of the particles, and c the velocity of light.
Inventors
- 👤 Shuzo Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/09
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A method for the production of laser output oscillations utilizing a gaseous mixture contained in a cylindrical oscillation tube having reflecting mirrors at its longitudinal ends comprising: A. subjecting the gas to a magnetic field parallel to the axis of said tube to produce cyclotron resonance in the gas particles; and B. simultaneously subjecting the gas to microwave oscillations in a direction perpendicular to the axis of said tube to obtain a cylindrical plasma, the axis of which is perpendicular to said reflecting mirrors, whereby oscillated rays of a fixed wave length are amplified between said mirrors.
Claim 2
Independent Claim
97 words
A method for the production of laser output oscillations utilizing a gaseous mixture contained in a cylindrical oscillation tube having reflecting mirrors at its longitudinal ends comprising: A. subjecting the gas to a magnetic field parallel to the axis of said tube to produce cyclotron resonance in the gas particles; and B. simultaneously subjecting the gas to microwave oscillations in a direction perpendicular to the axis of said tube to obtain a cylindrical plasma, the axis of which is perpendicular to said reflecting mirrors, whereby oscillated rays of a fixed wave length are amplified between said mirrors.
Claim 3
Dependent Claim
66 words
A method as set forth in claim 1 wherein the relationship between the intensity of said magnetic field and the frequency of said microwave oscillations is f eH/2 pi mc where, f frequency of microwave oscillations, e the electric charge of the particles of the gas, H the intensity of the magnetic field, m the average mass of the particles, and c the velocity of light.
Claim 4
Dependent Claim
83 words
Apparatus for the production of laser output oscillations comprising: A. a substantially cylindrical oscillation tube containing a gaseous mixture, and enclosed at its longitudinal ends by laser-emission-reflecting mirrors: B. a resonator enclosing said oscillation tube; C. means for providing microwave oscillations to said gaseous mixture to create a cylindrical plasma with an axis perpendicular to the face of the said mirrors; and D. means for creating a magnetic field parallel to the axis of the tube to subject the mixture to cyclotron resonance.
Claim 5
Dependent Claim
83 words
Apparatus for the production of laser output oscillations comprising: A. a substantially cylindrical oscillation tube containing a gaseous mixture, and enclosed at its longitudinal ends by laser-emission-reflecting mirrors: B. a resonator enclosing said oscillation tube; C. means for providing microwave oscillations to said gaseous mixture to create a cylindrical plasma with an axis perpendicular to the face of the said mirrors; and D. means for creating a magnetic field parallel to the axis of the tube to subject the mixture to cyclotron resonance.
Claim 6
Dependent Claim
27 words
Apparatus as set forth in claim 3, wherein said resonator is a cylindrical cavity resonator and said oscillation tube is positioned wIthin the cavity of said resonator.
Claim 7
Dependent Claim
15 words
Apparatus as set forth in claim 4 wherein the cavity resonator is of TE011 mode.
Claim 8
Dependent Claim
79 words
Apparatus for the production of laser output oscillations comprising: A. a cylindrically shaped magnetron having a gaseous mixture contained therein and laser-Wave-emission-reflecting mirrors closing its ends; B. a plurality of spaced elongated electrodes attached to said magnetron and extending radially toward the central axis of said magnetron and terminating in spaced relationship with said central axis; and C. means for providing a microwave discharge between adjoining electrodes to form a cylindrical plasma along the central axis of said magnetron.
Claim 9
Dependent Claim
79 words
Apparatus for the production of laser output oscillations comprising: A. a cylindrically shaped magnetron having a gaseous mixture contained therein and laser-Wave-emission-reflecting mirrors closing its ends; B. a plurality of spaced elongated electrodes attached to said magnetron and extending radially toward the central axis of said magnetron and terminating in spaced relationship with said central axis; and C. means for providing a microwave discharge between adjoining electrodes to form a cylindrical plasma along the central axis of said magnetron.
Claim 10
Dependent Claim
57 words
Apparatus as set forth in claim 6 wherein said plurality of electrodes are alternatively divided into two groups; a pair of antennas; means connecting one of said antennas to each electrode in one of said groups; and means for supplying microwaves to said antennas, whereby the microwave discharge occurs between adjoining electrodes to create said cylindrical plasma.
Claim 11
Dependent Claim
93 words
An electron cyclotron resonance-pumped gaseous laser comprising a gas-filled laser tube having reflecting means at each end thereof for reflecting at least a portion of electromagnetic radiation impinging thereon therebetween, means for applying a steady magnetic field to the gas in said laser tube, whereby free electrons present in said gas have a predetermined cyclotron frequency which is a function of the strength of said steady magnetic field, and pumping means coupled to the gas in said tube for applying electromagnetic oscillations thereto having a frequency substantially identical to said predetermined cyclotron frequency.
Claim 12
Dependent Claim
93 words
An electron cyclotron resonance-pumped gaseous laser comprising a gas-filled laser tube having reflecting means at each end thereof for reflecting at least a portion of electromagnetic radiation impinging thereon therebetween, means for applying a steady magnetic field to the gas in said laser tube, whereby free electrons present in said gas have a predetermined cyclotron frequency which is a function of the strength of said steady magnetic field, and pumping means coupled to the gas in said tube for applying electromagnetic oscillations thereto having a frequency substantially identical to said predetermined cyclotron frequency.
References Cited (Backward Citations)
US3209281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |