Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium

Bischel, William K.; Jacobs, Ralph R.; Prosnitz, Donald; Rhodes, Charles K.; Kelly, Patrick J.

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Title: Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium

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Abstract

Method and apparatus for producing laser radiation by two-photon optical pumping of an atomic or molecular gaseous medium and subsequent lasing action. A population inversion is created as a result of two-photon absorption of the gaseous species. Stark tuning is utilized, if necessary, in order to tune the two-photon transition into exact resonance. In particular, gaseous ammonia (NH.sub.3) or methyl fluoride (CH.sub.3 F) is optically pumped by a pair of CO.sub.2 lasers to create a population inversion resulting from simultaneous two-photon excitation of a high-lying vibrational state, and laser radiation is produced by stimulated emission of coherent radiation from the inverted level.

Inventors:

Bischel, William K. ^[1]; Jacobs, Ralph R. ^[2]; Prosnitz, Donald ^[3]; Rhodes, Charles K. ^[4]; Kelly, Patrick J. ^[5]

Menlo Park, CA
Livermore, CA
Hamden, CT
Palo Alto, CA
Fort Lewis, WA

Issue Date:: Tue Feb 20 00:00:00 EST 1979

Research Org.:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:: 863293

Patent Number(s):: 4140978

Assignee:: Dept. of Energy, Washington, DC (United States)

Patent Classifications (CPCs):: G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT

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G - PHYSICS G02 - OPTICS G02F - DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING
G02F1/3526 - {using two-photon emission or absorption processes

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01S - DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT
H01S3/094 - by coherent light
H01S3/223 - the active gas being polyatomic, i.e. containing more than one atom

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DOE Contract Number:: W-7405-ENG-48

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 42 ENGINEERING; method; apparatus; producing; laser; radiation; following; two-photon; excitation; gaseous; medium; optical; pumping; atomic; molecular; subsequent; lasing; action; population; inversion; created; result; absorption; species; stark; tuning; utilized; tune; transition; exact; resonance; particular; ammonia; nh; methyl; fluoride; optically; pumped; pair; lasers; create; resulting; simultaneous; high-lying; vibrational; produced; stimulated; emission; coherent; inverted; level; two-photon excitation; lasing action; photon absorption; optical pump; simultaneous two-photon; coherent radiation; molecular gas; optical pumping; laser radiation; gaseous medium; stimulated emission; population inversion; optically pumped; gaseous ammonia; producing laser; optically pump; /372/

Citation Formats


                    Bischel, William K., Jacobs, Ralph R., Prosnitz, Donald, Rhodes, Charles K., and Kelly, Patrick J. Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium.  United States: N. p., 1979. 
        Web.

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                    Bischel, William K., Jacobs, Ralph R., Prosnitz, Donald, Rhodes, Charles K., & Kelly, Patrick J. Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium.  United States.

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                    Bischel, William K., Jacobs, Ralph R., Prosnitz, Donald, Rhodes, Charles K., and Kelly, Patrick J. Tue .  
        "Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium".  United States.  https://www.osti.gov/servlets/purl/863293.

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@article{osti_863293,

  title        = {Method and apparatus for producing laser radiation following two-photon excitation of a gaseous medium},

  author       = {Bischel, William K. and Jacobs, Ralph R. and Prosnitz, Donald and Rhodes, Charles K. and Kelly, Patrick J.},

  abstractNote = {Method and apparatus for producing laser radiation by two-photon optical pumping of an atomic or molecular gaseous medium and subsequent lasing action. A population inversion is created as a result of two-photon absorption of the gaseous species. Stark tuning is utilized, if necessary, in order to tune the two-photon transition into exact resonance. In particular, gaseous ammonia (NH.sub.3) or methyl fluoride (CH.sub.3 F) is optically pumped by a pair of CO.sub.2 lasers to create a population inversion resulting from simultaneous two-photon excitation of a high-lying vibrational state, and laser radiation is produced by stimulated emission of coherent radiation from the inverted level.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Feb 20 00:00:00 EST 1979},

  month        = {Tue Feb 20 00:00:00 EST 1979}

}

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