Studies of saturated absorption and measurements of optical frequency for lines in the v1 + v3 and v1 + 2v4 bands of ammonia at 15 μm

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DOIResolve DOI: http://doi.org/10.1364/OE.17.009258
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TypeArticle
Journal titleOptics Express
ISSN1094-4087
Volume17
Issue11
Pages92589269; # of pages: 12
AbstractA cavity-enhanced absorption spectrometer was used to saturate several lines of ammonia in the 1510 nm – 1560 nm region. Analysis of power broadening of the saturated absorption feature for one of the ammonia lines yielded a dipole moment value comparable to that of the lines in the ν₁+ν₃ band in acetylene. Highly reproducible frequency measurements of four ammonia line centres were carried out using a frequency comb generated by a mode-locked Cr⁴⁺ :YAG laser. These results demonstrate the possible application of ammonia saturated absorption lines for frequency metrology and calibration in a spectral region lacking strong absorbers. To our knowledge, this is the first frequency measurement of saturated absorption lines in ammonia at near infrared frequencies and the first reported observation of saturated absorption lines in the ν₁+2ν₄ band.
Publication date
PublisherThe Optical Society
LanguageEnglish
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences; NRC Institute for National Measurement Standards
Peer reviewedYes
NPARC number21270334
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Record identifierbbc7ca9a-b001-40f0-8454-c154500fd6af
Record created2014-01-30
Record modified2016-05-09
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