Accurate determination of the Boltzmann constant by Doppler spectroscopy: Towards a new definition of the kelvin

Autor: Darquié, Benoît, Mejri, Sinda, Sow, Papa Lat Tabara, Lemarchand, Cyril, Triki, Meriam, Tokunaga, Sean, Bordé, Christian J., Chardonnet, Christian, Daussy, Christophe

Publikováno v: ICAP 2012 -- 23rd International Conference on Atomic Physics, Jul 2012, Palaiseau, France. EPJ Web of Conferences 57, pp.02005, 2013

Accurate molecular spectroscopy in the mid-infrared region allows precision measurements of fundamental constants. For instance, measuring the linewidth of an isolated Doppler-broadened absorption line of ammonia around 10 $\mu$m enables a determinat

Externí odkaz: http://arxiv.org/abs/1506.06464

A widely tunable 10-$\mu$m quantum cascade laser phase-locked to a state-of-the-art mid-infrared reference for precision molecular spectroscopy

Autor: Sow, Papa Lat Tabara, Mejri, Sinda, Tokunaga, Sean K., Lopez, Olivier, Goncharov, Andrey, Argence, Bérengère, Chardonnet, Christian, Amy-Klein, Anne, Daussy, Christophe, Darquié, Benoît

Publikováno v: App. Phys. Lett. 104, 264101 (2014)

We report the coherent phase-locking of a quantum cascade laser (QCL) at 10-$\mu$m to the secondary frequency standard of this spectral region, a CO2 laser stabilized on a saturated absorption line of OsO4. The stability and accuracy of the standard

Externí odkaz: http://arxiv.org/abs/1404.1162

Evidence for speed-dependent effects in NH3 self-broadened spectra: towards a new determination of the Boltzmann constant

Autor: Triki, Meriam, Lemarchand, Cyril, Darquié, Benoît, Sow, Papa Lat Tabara, Roncin, Vincent, Chardonnet, Christian, Daussy, Christophe

Publikováno v: Physical Review A 85, 6 (2012) 062510

In this paper we present an accurate analysis of the shape of an isolated rovibrational ammonia line from the strong nu2 band around 10 $\mu$m, recorded by laser absorption spectroscopy. Experimental spectra obtained under controlled temperature and

Externí odkaz: http://arxiv.org/abs/1201.4087

A widely tunable 10-µm quantum cascade laser phase-locked to a state-of-the-art mid-infrared reference for precision molecular spectroscopy

Autor: Sow, Papa Lat Tabara, Mejri, Sinda, Tokunaga, Sean K., Lopez, Olivier, Goncharov, Andrey, Argence, B��reng��re, Chardonnet, Christian, Amy-Klein, Anne, Daussy, Christophe, Darqui��, Beno��t

Publikováno v: Applied Physics Letters
Applied Physics Letters, American Institute of Physics, 2014, 104, pp.264101

We report the coherent phase-locking of a quantum cascade laser (QCL) at 10-$��$m to the secondary frequency standard of this spectral region, a CO2 laser stabilized on a saturated absorption line of OsO4. The stability and accuracy of the standa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2683c9d4c91916755d8abe7165205da1
https://hal.archives-ouvertes.fr/hal-00973136