Abstract
The conversion of energy into the mid-IR region (>2.2 μm) upon pumping by chirped picosecond pulses at a wavelength of 1.56 μm into a gas-filled hollow-core revolver-type fiber is studied numerically. It is shown that the combined cascade SRS process at vibrational-rotational levels in a D2/N2 mixture increases the degree of supercontinuum coherence and the maximum quantum efficiency of SRS conversion compared to a single-cascade process in deuterium. The possibility of obtaining a supercontinuum in the 3-μm band with a spectral width of 1800 nm and with a maximum quantum conversion efficiency of 48% in the range of D2 and N2 partial pressures up to 50 atm was demonstrated.
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The study was supported by the Russian Science Foundation (project no. 19-12-00361).
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Translated by D. Sventsitsky
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Yatsenko, Y.P., Gladyshev, A.V. & Bufetov, I.A. Coherent Mid-IR Supercontinuum in a Hollow Core Fiber Filled with a Mixture of Deuterium and Nitrogen. Bull. Lebedev Phys. Inst. 50 (Suppl 9), S996–S1005 (2023). https://doi.org/10.3103/S106833562321011X
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DOI: https://doi.org/10.3103/S106833562321011X