Amplification of 10 μm picosecond pulses in a compact optically pumped multiatmosphere CO2 laser

Tochitsky, Sergei Ya.; Matteo, D. A; Geske, E.; Martyshkin, D.; Fedorov, V. V.; Mirov, S. B.; Pogorelsky, Igor V.; Polyanskiy, M. N.; Joshi, C.

doi:10.1364/oe.573338

Amplification of 10 μm picosecond pulses in a compact optically pumped multiatmosphere CO₂ laser

Journal Article · Mon Sep 15 00:00:00 EDT 2025 · Optics Express

DOI:https://doi.org/10.1364/oe.573338· OSTI ID:2589761

Tochitsky, Sergei Ya. ^[1]; Matteo, D. A ^[1]; Geske, E. ^[1]; ^[2]; ^[2]; ^[2]; ^[3]; ^[3]; Joshi, C. ^[1]

Univ. of California, Los Angeles, CA (United States)
Univ. of Alabama, Birmingham, AL (United States)
Brookhaven National Laboratory (BNL), Upton, NY (United States)

Picosecond pulses, generated by a commercial mid-IR optical parametric source (∼0.5 ps, 1-5 μJ), have been regeneratively amplified to an energy of ≤2 mJ in a palm-size high-pressure CO₂ amplifier optically pumped by a Q-switched 2.8 μm Cr:Er:YSGG laser. The characteristics of the amplified pulses have been studied as a function of seed wavelength centered around 10.3 or 10.6 μm, and the pressure in the gain medium. The measured amplified pulse length is ∼5 ps. Numerical modeling suggests that pulses as short as ∼0.5 ps with multi-GW peak power can be generated in a mixture of CO₂ isotopes. Robustness of the output of a compact CO₂ regenerative amplifier to the seed and pump fluctuations measured at 3 Hz and a perfect Gaussian beam profile indicates the potential of such laser technology for producing high-power ultrashort long-wave infrared pulses at high repetition rates.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: SC0018378; SC0010064; SC0012704

OSTI ID:: 2589761

Report Number(s):: BNL--228966-2025-JAAM

Journal Information:: Optics Express, Journal Name: Optics Express Journal Issue: 19 Vol. 33; ISSN 1094-4087

Publisher:: Optica Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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