Abstract

We report on high-energy, few-cycle pulse generation in the long-wave infrared spectral region via difference-frequency generation (DFG) in GaSe and AgGaSe₂ nonlinear crystals. The DFG is driven by the signal at 3.5 µm and idler at 5 µm of a high-power mid-wave infrared optical parametric chirped pulse amplification (OPCPA) system operating at a 1-kHz repetition rate. The DFG pulses contain up to 17 µJ of energy and cover a spectrum from 8.5 µm to 14.5 µm. They are generated with a conversion efficiency of 2.1 %. Compression results in 10.2-$\mathrm{\mu}$J pulses with sub-150-fs duration, corresponding to less than four optical cycles.

© 2022 Optica Publishing Group

Few-cycle 65-µJ pulses at 11.4 µm for ultrafast nonlinear longwave-infrared spectroscopy

Pia Fuertjes, Martin Bock, Lorenz von Grafenstein, Dennis Ueberschaer, Uwe Griebner, and Thomas Elsaesser
Optica 9(11) 1303-1306 (2022)

Multi-millijoule, few-cycle 5 µm OPCPA at 1 kHz repetition rate

Lorenz von Grafenstein, Martin Bock, Dennis Ueberschaer, Esmerando Escoto, Azize Koç, Kevin Zawilski, Peter Schunemann, Uwe Griebner, and Thomas Elsaesser
Opt. Lett. 45(21) 5998-6001 (2020)

Inline amplification of mid-infrared intrapulse difference frequency generation

Q. Bournet, M. Jonusas, A. Zheng, F. Guichard, M. Natile, Y. Zaouter, M. Joffre, A. Bonvalet, F. Druon, M. Hanna, and P. Georges
Opt. Lett. 47(19) 4885-4888 (2022)

Long-wave-infrared pulse production at 11 µm via difference-frequency generation driven by femtosecond mid-infrared all-fluoride fiber laser

Yifan Cui, Hao Huang, Yu Bai, Weizhi Du, Mingshu Chen, Bohan Zhou, Igor Jovanovic, and Almantas Galvanauskas
Opt. Lett. 48(7) 1890-1893 (2023)

Efficient generation of mid-infrared few-cycle pulses by the intrapulse difference-frequency generation in YCOB

Xingbin Gu, Jinsheng Liu, Peng Yuan, Xiaoniu Tu, Dongfang Zhang, Jing Wang, Guoqiang Xie, and Jingui Ma
Opt. Lett. 47(19) 5244-5247 (2022)