GB1292016A - Metallic laser - Google Patents
Metallic laserInfo
- Publication number
- GB1292016A GB1292016A GB2285771A GB2285771A GB1292016A GB 1292016 A GB1292016 A GB 1292016A GB 2285771 A GB2285771 A GB 2285771A GB 2285771 A GB2285771 A GB 2285771A GB 1292016 A GB1292016 A GB 1292016A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- groove
- gas
- gas tube
- resonator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/031—Metal vapour lasers, e.g. metal vapour generation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
1292016 Lasers COMMISSARIAT A L'- ENERGIE ATOMIQUE 19 April 1971 [2 March 1970] 22857/71 Heading H1C In a tunable laser in which an active meta evaporated by an electric gas discharge between a cathode 10 and an anode 12 is ionized by the gas and produces stimulated emission, the cathode is in the form of a grooved block which is either formed wholly of the active metal, or consists of a different metal or an electrically insulating material having at least a part of the groove walls covered with a lining of the active metal. The gas may be helium and the metal cadmium. As shown in Fig. 1a, the grooved cathode 10 and a parallel rod anode 12 are housed in a glass gas tube 2 having Brewster end windows 4, the gas tube being located between resonator mirrors 6, 8 of which one is partially transmitting. The cathode is positioned so that the axis of symmetry of the groove coincides with the optical axis of the resonator. The groove has a depth greater than its width and may have its base enlarged and rounded as shown in Fig. 1b. Alternatively as shown in Fig. 2, the groove 20 may be formed of rectangular cross-section in a stainless steel block and have a cadmium lining 24 deposited on its base. Plural anodes 12 are also used, and the resonator consists of one plane and one spherical mirror 6, 8. The cathode may be cooled by a fluid passed through a duct 22, Fig. 1b, between inlet and outlet 14, 16, Fig. 1a. According to the Specification control of the anode-cathode voltage from a source 18 determines the wavelength of the stimulated emission, and frequency modulation can be obtained by varying the amplitude of the source voltage, e.g. for the reproduction of a colour image on a television receiver screen. The gas tube may include a control grid, and the cathode may be formed with a second groove oriented along a different axis to provide a dual output beam. The resonator mirrors may alternatively be within the gas tube.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7007416A FR2091869B1 (en) | 1970-03-02 | 1970-03-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1292016A true GB1292016A (en) | 1972-10-11 |
Family
ID=9051514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2285771A Expired GB1292016A (en) | 1970-03-02 | 1971-04-19 | Metallic laser |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2109893C2 (en) |
FR (1) | FR2091869B1 (en) |
GB (1) | GB1292016A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2194673A (en) * | 1986-08-30 | 1988-03-09 | English Electric Valve Co Ltd | Apparatus for forming an electron beam sheet |
US4825446A (en) * | 1986-06-14 | 1989-04-25 | English Electric Valve Company Limited | Laser apparatus having cathode bore directing electron beam onto anode |
GB2212322A (en) * | 1987-11-13 | 1989-07-19 | Ferranti Plc | Gas discharge laser apparatus |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4336506A (en) * | 1979-10-05 | 1982-06-22 | Bell Telephone Laboratories, Incorporated | Segmented plasma excitation-recombination laser |
US4388720A (en) * | 1981-04-06 | 1983-06-14 | Bell Telephone Laboratories, Incorporated | External control of recombination rate for electron-ion recombination lasers |
FR2529398A1 (en) * | 1982-06-28 | 1983-12-30 | Inst Optiki Atmosfery Sibirs | Gas discharge tube for pulsed laser - has electrode extending over length of tube in parallel to pulse source and heating supply |
DE3245916A1 (en) * | 1982-12-11 | 1984-06-14 | Hans-Joachim Prof. Dr. Eichler | Stable-geometry hollow cathode |
FR2672441B1 (en) * | 1991-02-04 | 1995-03-31 | Commissariat Energie Atomique | ELECTRODE FOR METAL VAPOR LASER USING METAL SUPPLY SOURCE AND LASER COMPRISING SUCH AN ELECTRODE. |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3396301A (en) * | 1964-04-20 | 1968-08-06 | Nippon Electric Co | Gas laser tube having a hollow elongated cathode electrode |
US3464025A (en) * | 1964-05-25 | 1969-08-26 | Spectra Physics | Gas lasers |
-
1970
- 1970-03-02 FR FR7007416A patent/FR2091869B1/fr not_active Expired
-
1971
- 1971-03-02 DE DE19712109893 patent/DE2109893C2/en not_active Expired
- 1971-04-19 GB GB2285771A patent/GB1292016A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4825446A (en) * | 1986-06-14 | 1989-04-25 | English Electric Valve Company Limited | Laser apparatus having cathode bore directing electron beam onto anode |
GB2194673A (en) * | 1986-08-30 | 1988-03-09 | English Electric Valve Co Ltd | Apparatus for forming an electron beam sheet |
US4839554A (en) * | 1986-08-30 | 1989-06-13 | English Electric Valve Company Limited | Apparatus for forming an electron beam sheet |
GB2194673B (en) * | 1986-08-30 | 1990-10-24 | English Electric Valve Co Ltd | Apparatus for forming an electron beam sheet |
GB2212322A (en) * | 1987-11-13 | 1989-07-19 | Ferranti Plc | Gas discharge laser apparatus |
Also Published As
Publication number | Publication date |
---|---|
FR2091869B1 (en) | 1974-08-09 |
DE2109893C2 (en) | 1982-11-04 |
FR2091869A1 (en) | 1971-01-21 |
DE2109893A1 (en) | 1972-08-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |