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Title: Tunable infrared source employing Raman mixing

Abstract

A tunable source of infrared radiation is obtained by irradiating an assemblage of Raman active gaseous atoms or molecules with a high intensity pumping beam of coherent radiation at a pump frequency .omega..sub.p to stimulate the generation of Stokes wave energy at a Stokes frequency .omega..sub.s and to stimulate the Raman resonant mode at the Raman mode frequency .omega..sub.R within the irradiated assemblage where the pump frequency .omega..sub.p minus the Stokes frequency .omega..sub.s is equal to the Raman mode frequency .omega..sub.R. The stimulated assemblage is irradiated with a tunable source of coherent radiation at a frequency .omega..sub.i to generate the output infrared radiation of the frequency .omega..sub.0 which is related to the Raman mode frequency .omega..sub.R and the input wave .omega..sub.i by the relation .omega..sub.0 =.omega..sub.i .+-..omega..sub.R. In one embodiment the interaction between the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i is collinear and the ratio of the phase velocity mismatch factor .DELTA.k to the electric field exponential gain coefficient T is within the range of 0.1 to 5. In another embodiment the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i have velocity vectors k.sub.p and k.sub.i which cross at an angle tomore » each other to compensate for phase velocity mismatches in the medium. In another embodiment, the Stokes wave energy .omega..sub.s is generated by pump energy .omega..sub.p in a first Raman cell and .omega..sub.s, .omega..sub.i and .omega..sub.p are combined in a second Raman mixing cell to produce the output at .omega..sub.i.« less

Inventors:
 [1];  [2]
  1. Stanford, CA
  2. Menlo Park, CA
Issue Date:
OSTI Identifier:
863615
Patent Number(s):
4213060
Assignee:
Board of Trustees of Leland Stanford University (Stanford, CA)
Patent Classifications (CPCs):
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
DOE Contract Number:  
EY-76-S-04-3570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
tunable; infrared; source; employing; raman; mixing; radiation; obtained; irradiating; assemblage; active; gaseous; atoms; molecules; intensity; pumping; beam; coherent; pump; frequency; omega; stimulate; generation; stokes; wave; energy; resonant; mode; irradiated; minus; equal; stimulated; generate; output; related; input; relation; embodiment; interaction; collinear; ratio; phase; velocity; mismatch; factor; delta; electric; field; exponential; coefficient; range; vectors; angle; compensate; mismatches; medium; generated; cell; combined; produce; pumping beam; coherent radiation; electric field; infrared radiation; wave energy; phase velocity; pump energy; raman cell; tunable source; stokes wave; raman active; resonant mode; infrared source; input wave; /359/

Citation Formats

Byer, Robert L, and Herbst, Richard L. Tunable infrared source employing Raman mixing. United States: N. p., 1980. Web.
Byer, Robert L, & Herbst, Richard L. Tunable infrared source employing Raman mixing. United States.
Byer, Robert L, and Herbst, Richard L. Tue . "Tunable infrared source employing Raman mixing". United States. https://www.osti.gov/servlets/purl/863615.
@article{osti_863615,
title = {Tunable infrared source employing Raman mixing},
author = {Byer, Robert L and Herbst, Richard L},
abstractNote = {A tunable source of infrared radiation is obtained by irradiating an assemblage of Raman active gaseous atoms or molecules with a high intensity pumping beam of coherent radiation at a pump frequency .omega..sub.p to stimulate the generation of Stokes wave energy at a Stokes frequency .omega..sub.s and to stimulate the Raman resonant mode at the Raman mode frequency .omega..sub.R within the irradiated assemblage where the pump frequency .omega..sub.p minus the Stokes frequency .omega..sub.s is equal to the Raman mode frequency .omega..sub.R. The stimulated assemblage is irradiated with a tunable source of coherent radiation at a frequency .omega..sub.i to generate the output infrared radiation of the frequency .omega..sub.0 which is related to the Raman mode frequency .omega..sub.R and the input wave .omega..sub.i by the relation .omega..sub.0 =.omega..sub.i .+-..omega..sub.R. In one embodiment the interaction between the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i is collinear and the ratio of the phase velocity mismatch factor .DELTA.k to the electric field exponential gain coefficient T is within the range of 0.1 to 5. In another embodiment the pump wave energy .omega..sub.p and the tunable input wave energy .omega..sub.i have velocity vectors k.sub.p and k.sub.i which cross at an angle to each other to compensate for phase velocity mismatches in the medium. In another embodiment, the Stokes wave energy .omega..sub.s is generated by pump energy .omega..sub.p in a first Raman cell and .omega..sub.s, .omega..sub.i and .omega..sub.p are combined in a second Raman mixing cell to produce the output at .omega..sub.i.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

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