2021
DOI: 10.1364/oe.434670
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Lasing in 15 atm CO2 cell optically pumped by a Fe:ZnSe laser

Abstract: 10 µm lasing is studied in a compact CO2-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 CO2 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-pressur… Show more

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Cited by 12 publications
(3 citation statements)
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“…A high-pressure CO2 laser pumped with a HBr chemical laser was also demonstrated [8]. Recently, lasing in a 15-atm CO2-He mixture was achieved with a ~ 50 mJ Fe:ZnSe pump laser [9]. Optimal lasing is observed when the pump wavelength is tuned to ~ 4.4 µm, which is at the absorption peak of 13 C 16 O2 (about 1% natural abundance).…”
Section: Direct Optical Pumpingmentioning
confidence: 99%
“…A high-pressure CO2 laser pumped with a HBr chemical laser was also demonstrated [8]. Recently, lasing in a 15-atm CO2-He mixture was achieved with a ~ 50 mJ Fe:ZnSe pump laser [9]. Optimal lasing is observed when the pump wavelength is tuned to ~ 4.4 µm, which is at the absorption peak of 13 C 16 O2 (about 1% natural abundance).…”
Section: Direct Optical Pumpingmentioning
confidence: 99%
“…Direct optical pumping of the CO 2 molecules using high-power NIR and MWIR sources is another promising approach. Optical pumping at 𝜆 = 4.3 μm, which is preferable for best quantum efficiency, by a Fe:ZnSe laser [116,117] and at 2.8 μm with Cr,Er:YSGG-or Ho:YAG-pumped OPA [118] are being investigated. Apart from enabling stable high-repetition operation, optical pumping considerably increases our ability to optimize the pressure and the composition of the active gas mixture.…”
Section: Mid-ir and Long Wavelength Infrared Lasersmentioning
confidence: 99%
“…Historically, work aimed at expanding the spectral range of created laser sources (using parametric amplification processes) was developed first. Particular interest was associated with the 10 µm region [30,31], which gives opportunities for generating super-powerful picosecond laser pulses in the far-infrared range [32], and is under development at present [33].…”
Section: Introductionmentioning
confidence: 99%