Frequency Conversion of Femtosecond Ti:Sapphire Laser Pulse to the Long-Wave Mid-IR Range with BaGa₂GeSe₆ Crystal

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2024年5月13日

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I. O. Kinyaevskiy,
A. V. Koribut,
Ya. V. Grudtsyn,
M. V. Ionin

摘要

Generation of ultrashort mid-IR pulses spanning from 8.5 to 10.5 μm with high energy (up to 4.5 μJ) was experimentally demonstrated through difference frequency generation in BaGa₂GeSe₆ crystal pumped by 100-fs 0.95-μm Ti:sapphire laser pulses. Optical damage threshold and two-photon absorption coefficient were determined for this pump pulses. Frequency conversion efficiency reached 0.24% at 1.85 mJ pump pulse energy and was decreased at higher one. Estimations indicate that application of 15 mm in diameter wide-aperture BaGa₂GeSe₆ sample will allow one to increase pump pulse energy up to ~10 mJ, and to increase the mid-IR pulse energy up to 24 μJ at the same efficiency.

Frequency Conversion of Femtosecond Ti:Sapphire Laser Pulse to the Long-Wave Mid-IR Range with BaGa2GeSe6 Crystal

摘要

Frequency Conversion of Femtosecond Ti:Sapphire Laser Pulse to the Long-Wave Mid-IR Range with BaGa₂GeSe₆ Crystal