利用 BaGa2GeSe6 晶体将飞秒钛：蓝宝石激光脉冲的频率转换到长波中红外范围

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2024-05-13 DOI:10.1134/s0021364024600988

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

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引用次数: 0

摘要

通过在 BaGa2GeSe6 晶体中利用 100 fs 0.95 μm Ti:sapphire 激光脉冲泵浦产生的差频，实验证明产生了跨度为 8.5 至 10.5 μm 的高能量（高达 4.5 μJ）超短中红外脉冲。测定了泵浦脉冲的光损伤阈值和双光子吸收系数。当泵浦脉冲能量为 1.85 mJ 时，频率转换效率达到 0.24%，当能量越高时，频率转换效率越低。估计表明，应用直径为 15 毫米的宽孔径 BaGa2GeSe6 样品可以将泵浦脉冲能量提高到约 10 mJ，并在效率不变的情况下将中红外脉冲能量提高到 24 μJ。

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Frequency Сonversion of Femtosecond Ti:sapphire Laser Pulse to the Long-wave Mid-IR Range with BaGa2GeSe6 Crystal

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.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.