2021/09/01 by Yazhou Wang, Olav ThorbjØrn Sandberg Schiess, Wang, Yazhou +5
Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #physics.optics
paper · pdf · doi:10.48550/arxiv.2109.00215
I would like to withdrawal this paper because a mistake needs to be corrected. I will upload a new version
arxiv created 2021/09/03 · arxiv updated 2021/09/06
In this letter, we present a high pulse energy Raman laser at 1946 nm wavelength directly pumped with a 1533 nm custom-made fiber laser. The Raman laser is based on the stimulated Raman scattering (SRS) in an 8-meter carbon dioxide (CO2) filled nested anti-resonant hollow-core fiber (ARHCF). The low energy phonon emission combined with the inherent SRS process along the low-loss fiber allows the generation of high pulse energy up to 15.4 μJ at atmospheric CO2 pressure. The Raman laser exhibits good long-term stability and low relative intensity noise (RIN) of less than 4%. We also investigate the pressure-dependent overlap of the Raman laser line with the absorption band of CO2 at 2 μm spectral range. Our results constitute a novel and promising technology towards high energy 2 μm lasers.