Octave-spanning single-cycle middle-infrared generation through optical parametric amplification in LiGaS2

被引：48

作者：

Chen, Bo-Han ^{[1
,2
]}

Wittmann, Emanuel ^{[3
]}

Morimoto, Yuya ^{[1
,2
]}

Baum, Peter ^{[1
,2
,4
]}

Riedle, Eberhard ^{[3
]}

机构：

[1] Ludwig Maximilians Univ Munchen, Coulombwall 1, D-85748 Garching, Germany

[2] Max Planck Inst Quantum Opt, Hans Kopfermann Str 1, D-85748 Garching, Germany

[3] Ludwig Maximilians Univ Munchen, LS BioMol Opt, Oettingenstr 67, D-80538 Munich, Germany

[4] Univ Konstanz, Univ Str 10, D-78464 Constance, Germany

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 15期

基金：

欧洲研究理事会; 欧盟地平线“2020”;

关键词：

MIDINFRARED SPECTRAL RANGE; FIELD-RESOLVED DETECTION; MU-M; ULTRAVIOLET PULSES; TRANSIENTS; POWER; SPECTROSCOPY; AMPLITUDES; MICROSCOPY;

D O I：

10.1364/OE.27.021306

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the generation of extremely broadband and inherently phase-locked mid-infrared pulses covering the 5 to 11 mu m region. The concept is based on two stages of optical parametric amplification starting from a 270-fs Yb:KGW laser source. A continuum seeded, second harmonic pumped pre-amplifier in beta-BaB2O4 (BBO) produces tailored broadband near-infrared pulses that are subsequently mixed with the fundamental pump pulses in LiGaS2 (LGS) for mid-infrared generation and amplification. The pulse bandwidth and chirp is managed entirely by selected optical filters and bulk material. We find an overall quantum efficiency of 1% and a mid-infrared spectrum smoothly covering 5-11 gm with a pulse energy of 220 nJ at 50 kHz repetition rate. Electro-optic sampling with 12-fs long white-light pulses directly from self-compression in a YAG crystal reveals near-single-cycle mid-infrared pulses (32 fs) with passively stable carrier-envelope phase. Such pulses will be ideal for producing attosecond electron pulses or for advancing molecular fingerprint spectroscopy. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：21306 / 21318

页数：13

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