70 MW-Level Picosecond Mid-Infrared Radiation Generation by Difference Frequency Generation in AgGaS2, BaGa4Se7, LiGaSe2, and LiGaS2

IF 2.1 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Photonics Journal Pub Date : 2025-02-14 DOI:10.1109/JPHOT.2025.3542540

Michal Jelínek;Milan Frank;Václav Kubeček;Ondřej Novák;Jaroslav Huynh;Martin Cimrman;Michal Chyla;Martin Smrž;Tomáš Mocek

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Abstract

Comparative study of nonlinear crystals for picosecond difference frequency generation in mid-IR is presented. Nonlinear crystals of AgGaS₂, BaGa₄ Se₇, LiGaSe₂, and LiGaS₂ were studied. In order to investigate the dependence of efficiency on the crystal length, three sets of crystals with lengths of 2, 4, or 8 mm were tested. The developed tunable DFG system was driven by the 1.03 µm, 1.8 ps, Yb:YAG thin-disk laser system operated at the repetition rate of 10 or 100 Hz. As the best result, picosecond mid-IR pulses at a wavelength of

$\sim$

7 µm with the energy up to 130 µJ corresponding to the peak power of

$\sim$

72 MW were generated using the 8 mm long LiGaS₂ crystal. Using the BaGa₄ Se₇ crystal, DFG tunability in the wavelength range from 6 up to 13 µm was achieved.

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来源期刊

IEEE Photonics Journal ENGINEERING, ELECTRICAL & ELECTRONIC-OPTICS

CiteScore

4.50

自引率

8.30%

发文量

489

审稿时长

1.4 months

期刊介绍： Breakthroughs in the generation of light and in its control and utilization have given rise to the field of Photonics, a rapidly expanding area of science and technology with major technological and economic impact. Photonics integrates quantum electronics and optics to accelerate progress in the generation of novel photon sources and in their utilization in emerging applications at the micro and nano scales spanning from the far-infrared/THz to the x-ray region of the electromagnetic spectrum. IEEE Photonics Journal is an online-only journal dedicated to the rapid disclosure of top-quality peer-reviewed research at the forefront of all areas of photonics. Contributions addressing issues ranging from fundamental understanding to emerging technologies and applications are within the scope of the Journal. The Journal includes topics in: Photon sources from far infrared to X-rays, Photonics materials and engineered photonic structures, Integrated optics and optoelectronic, Ultrafast, attosecond, high field and short wavelength photonics, Biophotonics, including DNA photonics, Nanophotonics, Magnetophotonics, Fundamentals of light propagation and interaction; nonlinear effects, Optical data storage, Fiber optics and optical communications devices, systems, and technologies, Micro Opto Electro Mechanical Systems (MOEMS), Microwave photonics, Optical Sensors.