Mid- and Near-Infrared Spectral Broadening in Deuterium-Filled Gas Fiber Raman Laser

Wavelength conversion of ultrashort laser pulses towards mid-IR range has been recently demonstrated by means of chirp-assisted stimulated Raman scattering (SRS) in gas-filled hollow-core fibers (HCF) [1] – [3] . These advances open up new opportunities for the development of the fiber-based mid-IR supercontinuum (SC) sources, since efficient SRS could significantly improve the spectral power density in the mid-IR spectral range.