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A difference frequency generation spectrometer and its detection of atmospheric N2O

  • Zhensong Cao
  • , Xiaoming Gao*
  • , Lunhua Deng
  • , W. D. Chen
  • , Yiqian Yuan
  • , Weijun Zhang
  • , Zhiben Gong
  • *Corresponding author for this work
  • CAS - Anhui Institute of Optics and Fine Mechanics
  • Université du Littoral Côte-d'Opale

Research output: Contribution to journalArticlepeer-review

Abstract

The paper reports the realization and characterization of a difference frequency generation spectrometer using periodically poled lithium niobate (PPLN) crystal. The pump and signal laser we used is a Ti:sapphire ring laser and a diode pumped monolithic Nd:YAG laser, respectively. The continuous wave (cw) infrared radiation from 2.8 to 4.8 μm has been generated. The idler radiation can be used to study fundamental absorption bands of molecules and trace gas detection. In this work, we report the detection of nitrous oxide (N2O) in atmosphere, the minimum detectable concentration of 10.9 ppbV was achieved using a Herriott cell with the optical path length of 100 m.

Original languageEnglish
Pages (from-to)74-77
Number of pages4
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume68
Issue number1
DOIs
StatePublished - Sep 2007
Externally publishedYes

Keywords

  • Difference frequency generation
  • Nitrous oxide
  • Trace gas detection

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