Titre :

High-resolution THz gain measurements in optically pumped ammonia

Auteur(s) :

Mičica, Martin [Auteur correspondant]
Technical University of Ostrava [Ostrava] [VSB]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Eliet, Sophie [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Vanwolleghem, Mathias [Auteur]
IT4Innovations - National Supercomputing Center [Ostrava]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]
Motiienko, Roman [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Pienkina, Anastasia [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Margulès, Laurent [Auteur]
Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM]
Postava, Kamil [Auteur]
IT4Innovations - National Supercomputing Center [Ostrava]
Pištora, Jaromír [Auteur]
IT4Innovations - National Supercomputing Center [Ostrava]
Lampin, Jean-Francois [Auteur]
Photonique THz - IEMN [PHOTONIQUE THZ - IEMN]

Titre de la revue :

Optics Express

Pagination :

21242

Éditeur :

Optical Society of America - OSA Publishing

Date de publication :

2018

ISSN :

1094-4087

Mot(s)-clé(s) en anglais :

NH3
MIR quantum cascade laser

Discipline(s) HAL :

Physique [physics]/Physique [physics]/Optique [physics.optics]

Résumé en anglais : [en]

This study is aimed at the evaluation of THz gain properties in an optically pumped NH$_3$ gas. NH$_3$ molecules undergo rotational-vibrational excitation by mid-infrared (MIR) optical pumping provided by a MIR quantum ...
Lire la suite >This study is aimed at the evaluation of THz gain properties in an optically pumped NH$_3$ gas. NH$_3$ molecules undergo rotational-vibrational excitation by mid-infrared (MIR) optical pumping provided by a MIR quantum cascade laser (QCL) which enables precise tuning to the NH3 infrared transition around 10.3 μm. Pure inversion transitions, (J = 3, K = 3) at 1.073 THz and (J = 4, K = 4) at 1.083 THz were selected. The THz measurements were performed using a THz frequency multiplier chain. The results show line profiles with and without optical pumping at different NH3 pressures, and with different MIR tuning. The highest gain at room temperature under the best conditions obtained during single pass on the (3,3) line was 10.1 dB×m$^{−1}$ at 26 μbar with a pumping power of 40 mW. The (4,4) line showed lower gain of 6.4 dB×m$^{−1}$ at 34 μbar with a pumping power of 62 mW. To our knowledge these THz gains are the highest measured in a continuous-wave MIR pumped gas.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Projet ANR :

Conception de détecteurs heterodyne optimisés pour les sources synchrotron

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL