High-resolution THz gain measurements in optically pumped ammonia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F18%3A10239677" target="_blank" >RIV/61989100:27640/18:10239677 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/18:10239677

Výsledek na webu

<a href="https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-16-21242" target="_blank" >https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-16-21242</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.26.021242" target="_blank" >10.1364/OE.26.021242</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-resolution THz gain measurements in optically pumped ammonia

Popis výsledku v původním jazyce

This study is aimed at the evaluation of THz gain properties in an optically pumped NH3 gas. NH3 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 dBxm-1 at 26 µbar with a pumping power of 40 mW. The (4,4) line showed lower gain of 6.4 dBxm-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. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Název v anglickém jazyce

High-resolution THz gain measurements in optically pumped ammonia

Popis výsledku anglicky

This study is aimed at the evaluation of THz gain properties in an optically pumped NH3 gas. NH3 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 dBxm-1 at 26 µbar with a pumping power of 40 mW. The (4,4) line showed lower gain of 6.4 dBxm-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. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

OPTICS EXPRESS

ISSN

1094-4087

e-ISSN

—

Svazek periodika

26

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

21242-21248

Kód UT WoS článku

000440803600135

EID výsledku v databázi Scopus

2-s2.0-85051269899