US3609582A - Device for producing stimulated infrared emission,iraser,by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid and discharge tube for such a divice - Google Patents

Device for producing stimulated infrared emission,iraser,by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid and discharge tube for such a divice Download PDF

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Publication number
US3609582A
US3609582A US799384A US3609582DA US3609582A US 3609582 A US3609582 A US 3609582A US 799384 A US799384 A US 799384A US 3609582D A US3609582D A US 3609582DA US 3609582 A US3609582 A US 3609582A
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United States
Prior art keywords
electrodes
tube
discharge
gas mixture
interruption
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Expired - Lifetime
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US799384A
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English (en)
Inventor
Henricus Joannes Francis Smets
Auke Gerrit Van Der Kooi
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US Philips Corp
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US Philips Corp
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    • 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
    • H01S3/038—Electrodes, e.g. special shape, configuration or composition
    • 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
    • H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
    • H01S3/22—Gases

Definitions

  • ABSTRACT An infrared laser employing a discharge in carbonic acid gas in a quartz tube, the electrodes consisting of platinum cylinders surrounding interruptions in the quartz tube.
  • the invention relates to a device for producing stimulated infrared emission, an iraser, by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid in a circular cylindrical quartz tube, the electrodes being arranged laterally of the iraser resonator.
  • the discharge path in the resonator space therefore does not extend symmetrically at the ends. This has an unfavorable influence on the mode pattern and the irradiated power.
  • a device for producing stimulated infrared emission, an iraser, by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid in a circular cylindrical quartz tube.
  • the electrodes are arranged laterally of the iraser resonator and consist of circular-cylindrical rings which are arranged coaxially with the discharge space on the outside of the quartz tube.
  • the rings surround a circumferential interruption in the quartz tube with wider quartz tubes surrounding the electrodes and connecting the interrupted parts together in a vacuumtight manner.
  • the interruption in this construction need be only narrow, less than 1 mm. because the current intensity usually is less than 100 mm. At the total pressure of approximately Torr. the discharge current distributes regularly over the whole circumference of the interruptions so that the whole cross section of the tube contributes evenly to the discharge and a favorable symmetrical mode pattern is obtained. As a result of the narrow interruption, very little sputtering occurs inside the discharge space.
  • FIG. 1 diagrammatically shows a discharge tube according to the invention
  • FIG. 2 shows a part thereof at a given stage of the manufacture on an enlarged scale.
  • reference numeral 1 denotes a quartz tube, 2.0 m. long, mm. inside diameter.
  • the tube On the lefthand side the tube is sealed in a vacuumtight manner by means of a concave ground aluminum block 2 (radius of curvature 4.5 m.) coated with a layer of gold 3.0.
  • a flat germanium plate 4 (2 mm. thick) closes the tube.
  • the tube 1 is interrupted at 5 and 6 over a length of 0.5 mm.
  • the parts being connected by wider tubes 7 and 8.
  • the platinum cylinders 10 are arranged at a distance of 0.5 mm. from the tube I and the elongations thereof.
  • Tungsten lead-in members 11 and 12 support the electrodes.
  • the exhaust tube is denoted by 13.
  • FIG. 2 shows the right-hand part of the tube in a state in which it is not yet entirely finished.
  • the tube 8 is sealed on the left-hand side to tube 1, the electrode 10 surrounds the copper cylinder 14, 0.5 mm. thick, which engages the tube
  • the elongation 16 of tube 1 is inserted on the right-hand side in the cylinder I4 until it engages the edge 15 which, from the cylinder 14, is directed inwardly and is enclosed between the tubes 1 and 16.
  • the electrode 10 is previously welded to the lead-in member 12. After inserting the elongation 16, the sealing edge 17 may be formed. After dissolving the copper cylinder 14 in nitric acid, the tube may be finished.
  • a device for producing stimulated infrared emission comprising means including electrodes for providing an electric discharge in a discharge space containing a gas mixture consisting at least part] of carbonic acid in a circular-cylindrical quartz tube, said In e including circumferential interruptions,
  • the electrodes being arranged laterally of the discharge space, said electrodes having the shape of circular-cylindrical rings arranged coaxially with said discharge space on the outside of said quartz tube and each surrounding a circumferential interruption, wider quartz tubes surrounding said electrodes and connecting the interrupted parts together in a vacuumtight manner.
  • a discharge tube for a device as claimed in claim I wherein the width of the interruption is a few tenths of a mm. and the electrodes surround the interruption with a distance of a few tenths of a mm. each of said electrodes being composed of platinum.
  • a device for producing stimulated infrared emission by means of an electric discharge in gas mixture comprising a circular cylindrically shaped quartz tube including first and second circumferential interruptions, first and second electrodes for providing said electric discharge, said electrodes each positioned laterally with respect to said tube and shaped as circular cylindrical rings arranged coaxially with said tube and surrounding a respective one of said circumferential interruptions, and means surrounding said electrodes and interconnecting the interrupted portions of said tube together in a vacuumtight manner.
  • each of said means surrounding said electrodes is a quartz tube.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US799384A 1968-02-19 1969-02-14 Device for producing stimulated infrared emission,iraser,by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid and discharge tube for such a divice Expired - Lifetime US3609582A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6802368A NL6802368A (enrdf_load_stackoverflow) 1968-02-19 1968-02-19

Publications (1)

Publication Number Publication Date
US3609582A true US3609582A (en) 1971-09-28

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ID=19802824

Family Applications (1)

Application Number Title Priority Date Filing Date
US799384A Expired - Lifetime US3609582A (en) 1968-02-19 1969-02-14 Device for producing stimulated infrared emission,iraser,by means of an electric discharge in a gas mixture consisting at least partly of carbonic acid and discharge tube for such a divice

Country Status (5)

Country Link
US (1) US3609582A (enrdf_load_stackoverflow)
DE (1) DE1905041A1 (enrdf_load_stackoverflow)
FR (1) FR1601832A (enrdf_load_stackoverflow)
GB (1) GB1201444A (enrdf_load_stackoverflow)
NL (1) NL6802368A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242648A (en) * 1978-12-29 1980-12-30 Westinghouse Electric Corp. High power electrode and feedthrough assembly for high temperature lasers
US5043997A (en) * 1985-05-03 1991-08-27 Raytheon Company Hybrid cathode

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245916A1 (de) * 1982-12-11 1984-06-14 Hans-Joachim Prof. Dr. Eichler Geometriestabile hohlkathode
JPS6037189A (ja) * 1983-08-09 1985-02-26 Mitsubishi Electric Corp 無声放電励起同軸型レ−ザ発振器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4242648A (en) * 1978-12-29 1980-12-30 Westinghouse Electric Corp. High power electrode and feedthrough assembly for high temperature lasers
US5043997A (en) * 1985-05-03 1991-08-27 Raytheon Company Hybrid cathode

Also Published As

Publication number Publication date
FR1601832A (enrdf_load_stackoverflow) 1970-09-14
DE1905041A1 (de) 1969-09-04
GB1201444A (en) 1970-08-05
NL6802368A (enrdf_load_stackoverflow) 1969-08-21

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