Lasing in 15 atm CO 2 cell optically pumped by a Fe:ZnSe laser

10 µm lasing is studied in a compact CO 2 -He cell pressurized up to 15 atm when optically pumped by a ∼50 mJ Fe:ZnSe laser tunable around 4.3 µm. The optimal pump wavelength and partial pressure of CO 2 for generating 10 µm pulses are found to be ∼4.4 µm and 0.75 atm, respectively. Without cavity o...

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Bibliographic Details
Published in:Optics express 2021-09, Vol.29 (20), p.31455
Main Authors: Tovey, Dana, Pigeon, Jeremy, Tochitsky, Sergei, Louwrens, Gerhard, Ben-Zvi, Ilan, Martyshkin, Dmitry, Fedorov, Vladimir, Karki, Krishna, Mirov, Sergey, Joshi, Chan
Format: Article
Language:English
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Summary:10 µm lasing is studied in a compact CO 2 -He cell pressurized up to 15 atm when optically pumped by a ∼50 mJ Fe:ZnSe laser tunable around 4.3 µm. The optimal pump wavelength and partial pressure of CO 2 for generating 10 µm pulses are found to be ∼4.4 µm and 0.75 atm, respectively. Without cavity optimization, the optical-to-optical conversion efficiency reached ∼10% at a total pressure of 7 atm. The gain lifetime is measured to be ∼1 µs at pressures above 10 atm, indicating the feasibility of using high-pressure optically pumped CO 2 for the efficient amplification of picosecond 10 µm pulses.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.434670