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Applied Physics B

, Volume 117, Issue 2, pp 681–687 | Cite as

Line intensity measurements of methane’s \(\nu _3\)-band using a cw-OPO

  • Marco P. Moreno
  • Malo Cadoret
  • Mohammad Jahjah
  • Linh Nguyen
  • Flavio C. Cruz
  • Jean-Jacques Zondy
Article

Abstract

We report on absolute line strength measurements of P(1), R(0) and R(1) singlet lines in the \(3.3\,\upmu\hbox {m}\,\nu _{3}\) (C–H stretching) band of methane \(^{12}\hbox {CH}_4\) at reference temperature \(T=296\) K. Line strength measurements are performed at low pressure \((P \le 1\hbox { Torr})\) using direct absorption spectroscopy technique based on a widely tunable continuous-wave singly resonant optical parametric oscillator. The \(1\sigma \) overall accuracy in line strength determinations ranges between 7 and 8 % mostly limited by pressure and frequency measurements. A comparison with previous reported values is made. Our results show good agreement with the HITRAN 2012 database.

Keywords

Optical Parametric Oscillator Line Strength Free Spectral Range Idle Power Idle Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors acknowledge partial support from a FP7- EURAMET grant (contract No ENV-06). M. P. Moreno thanks CAPES for postdoctoral fellowship support under BEX-12610-12-7. The authors thank PHC-Capes Cofecub program (project code: 25060RE) for support.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Marco P. Moreno
    • 1
    • 2
  • Malo Cadoret
    • 1
  • Mohammad Jahjah
    • 1
  • Linh Nguyen
    • 1
  • Flavio C. Cruz
    • 3
  • Jean-Jacques Zondy
    • 1
  1. 1.Laboratoire Commun de Métrologie LNE-CnamLa Plaine Saint DenisFrance
  2. 2.Departamento de FísicaUniversidade Federal de RondôniaCampus Ji-ParanáBrazil
  3. 3.Instituto de Física Gleb WataghinUniversidade Estadual de CampinasCampinasBrazil

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