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Pré-Publication, Document De Travail Année : 2007

HCOOH high resolution spectroscopy in the 9.18$\mu$m region

Résumé

We report on higly accurate absolute frequency measurement against a femtosecond frequency comb of 6 saturated absorption lines of formic acid (HCOOH) with an accuracy of 1~kHz. We also report the frequency measurement of 17 other lines with an accuracy of 2~kHz. Those lines are in quasi coincidence with the 9R(36) to 9R(42) CO$_2$ laser emission lines and are probed either by a CO$_2$ or a widely tunable quantum cascade laser phase locked to a master CO$_2$ laser. The relative stability of two HCOOH stabilized lasers is characterized by a relative Allan deviation of 4.5~10$^{-12}$~$\tau^{-1/2}$. They give suitable frequency references for H$_2^+$ Doppler free two-photon spectroscopy.
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Dates et versions

hal-00162635 , version 1 (15-07-2007)

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Franck Bielsa, Khelifa Djerroud, Andrei Goncharov, Albane Douillet, Tristan Valenzuela, et al.. HCOOH high resolution spectroscopy in the 9.18$\mu$m region. 2007. ⟨hal-00162635⟩
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