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

Patent ·
OSTI ID:863293
 [1];  [2];  [3];  [4];  [5]
  1. Menlo Park, CA
  2. Livermore, CA
  3. Hamden, CT
  4. Palo Alto, CA
  5. Fort Lewis, WA
+ Show Author Affiliations
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.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA
DOE Contract Number:
W-7405-ENG-48
Assignee:
Dept. of Energy, Washington, DC (United States)
Patent Number(s):
4,140,978
OSTI ID:
863293
Country of Publication:
United States
Language:
English

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Patent · Fri Apr 29 00:00:00 EDT 1977 · OSTI ID:5198707
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Related Subjects

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