Efficient, sub-4-cycle, 1-μm-pumped optical parametric amplifier at 10 μm based on BaGa4S7

被引：26
作者：
Heiner, Zsuzsanna [1 ]
Petrov, Valentin [2 ]
Mero, Mark [2 ]
机构：
[1] Humboldt Univ, Sch Analyt Sci Adlershof, D-12489 Berlin, Germany
[2] Max Born Inst Nonlinear Opt & Short Pulse Spect, D-12489 Berlin, Germany
来源：
OPTICS LETTERS | 2020年 / 45卷 / 20期
基金：
欧盟地平线“2020”;
关键词：
PHASE-MATCHING PROPERTIES; MID-IR; FEW-CYCLE; CRYSTALS; LIGAS2; KHZ;
D O I：
10.1364/OL.403856
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on a microjoule-scale mid-infrared optical parametric amplifier (OPA) based on the recently developed wide-bandgap orthorhombic crystal, BaGa4S7 (BGS) and directly compare its performance to that of LiGaS2 (LGS) in the same OPA setup. The source is based on a single OPA stage amplifying supercontinuum seed pulses with a quantum efficiency of 29% at an idler wavelength of 10 mu m, featuring nominally carrier-envelope phase-stable pulses. As a result of pumping the OPA directly at 1 mu m, the overall conversion efficiency far exceeds that of traditional schemes based onOPAs followed by difference frequency generation. Chirp compensation using bulk germanium resulted in 126 fs pulses covering the 7.6-11.5 mu m spectral range. BGS holds great promise for power scaling due to its availability in larger single-crystal sizes than LGS. (C) 2020 Optical Society of America
引用
收藏
页码：5692 / 5695
页数：4
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