GB1443974A - Laser - Google Patents

Laser

Info

Publication number
GB1443974A
GB1443974A GB5044573A GB5044573A GB1443974A GB 1443974 A GB1443974 A GB 1443974A GB 5044573 A GB5044573 A GB 5044573A GB 5044573 A GB5044573 A GB 5044573A GB 1443974 A GB1443974 A GB 1443974A
Authority
GB
United Kingdom
Prior art keywords
gas
tube
optical pumping
constituent
laser
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
Application number
GB5044573A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Massachusetts Institute of Technology
Original Assignee
Massachusetts Institute of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US00301894A external-priority patent/US3826997A/en
Application filed by Massachusetts Institute of Technology filed Critical Massachusetts Institute of Technology
Publication of GB1443974A publication Critical patent/GB1443974A/en
Expired legal-status Critical Current

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
    • H01S3/14—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
    • H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms
    • H01S3/2232—Carbon dioxide (CO2) or monoxide [CO]
    • 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
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/097—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
    • H01S3/0971—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser transversely excited
    • H01S3/09713—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser transversely excited with auxiliary ionisation, e.g. double discharge excitation
    • H01S3/09716—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser transversely excited with auxiliary ionisation, e.g. double discharge excitation by ionising radiation
    • 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
    • H01S3/223—Gases the active gas being polyatomic, i.e. containing two or more atoms

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Lasers (AREA)
  • Electron Tubes For Measurement (AREA)
  • Electron Sources, Ion Sources (AREA)
  • Discharge Lamp (AREA)

Abstract

1443974 Lasers MASSACHUSETTS INSTITUTE OF TECHNOLOGY 30 Oct 1973 [30 Oct 1972 26 Feb 1973] 50445/73 Heading H1C A gas laser is pumped by the combination of a light source which photoionizes at least a constituent of the gas and an electric discharge, photoionization occurring predominantly by a multiple step process involving absorption of successive photons any one of which has a photon energy less than the ionization potential of the responsive gas constituent. As described the gas may be a CO 2 -N 2 -He mixture with an added photoionizable constituent consisting of tri-n-propyl amine, tri-butyl amine or tripentyl amine; the gas flowing between inlet and outlet 140, 142 of a gas laser tube 110, Figs. 4 and 5. The tube is terminated by plates 112, 114 respectively supporting a highly reflective gold plated curved mirror 116 and a partially transmissive curved germanium window 118. Within the tube chrome plated parallel aluminium electrodes 122, 124 are supported by phenolic rings 126, 128 and quartz-walled xenon flash lamps 132, 134 are mounted for optical pumping. The electrodes and lamps are respectively energized from power supplies 131 and 138 by way of an energy storage capacitor 130 and a capacitor-triggered spark gap 136. If the electrode potential is insufficient to cause an avalanche discharge it is applied at the same time as the optical pumping. Otherwise it is interrupted by a switch 125 which is closed by a timing circuit 123 after optical pumping commences. An alternative form of optical pumping is shown in Fig. 6 in which flash lamps 154, 156 outside the gas tube apply light beams directed by reflectors 150, 152 through a dichroic resonator reflector 116<SP>1</SP>. Within the tube the beams are repeatedly reflected in zig-zag fashion along the tube length by mirrors 158, 160. This pumping arrangement may be wholly within the tube, the diochroic reflector being then omitted. In an alternative construction, Fig. 7 (not shown), photoexcitation and electric field excitation occur in separate coupled chambers. It is stated that with suitable primary laser gas constituents the need for an added gas component does not arise.
GB5044573A 1972-10-30 1973-10-30 Laser Expired GB1443974A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US00301894A US3826997A (en) 1972-10-30 1972-10-30 Laser pumped by photoionization generated, electrically heated plasma
US33582073A 1973-02-26 1973-02-26

Publications (1)

Publication Number Publication Date
GB1443974A true GB1443974A (en) 1976-07-28

Family

ID=26972647

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5044573A Expired GB1443974A (en) 1972-10-30 1973-10-30 Laser

Country Status (3)

Country Link
JP (1) JPS5756225B2 (en)
DE (2) DE2354341C3 (en)
GB (1) GB1443974A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3126375C2 (en) * 1981-07-03 1986-11-13 Kraftwerk Union AG, 4330 Mülheim Transversely excited high energy laser
AU567376B2 (en) * 1984-03-12 1987-11-19 Gkn Automotive Components Inc. Method of forming a precision balltrack
EP0166029B1 (en) * 1984-06-29 1990-07-25 Siemens Aktiengesellschaft Gas laser tube and method for making the same
DE3546210A1 (en) * 1985-12-27 1987-07-02 Gugg Anton Dipl Ing Fh Laser range finder
DE3546152A1 (en) * 1985-12-27 1987-07-02 Gugg Anton Dipl Ing Fh Laser
US5153892A (en) * 1990-01-24 1992-10-06 Hitachi, Ltd. High-pressure gas laser apparatus and method of laser processing

Also Published As

Publication number Publication date
DE2354341A1 (en) 1974-05-02
DE2365909A1 (en) 1977-03-17
DE2365909C2 (en) 1983-08-11
DE2354341B2 (en) 1981-06-04
DE2354341C3 (en) 1982-03-04
JPS5756225B2 (en) 1982-11-29
JPS4995596A (en) 1974-09-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee