Abstract

The continued development of femtosecond mid-infrared (IR) sources with ultrabroad spectral width is critical for probing and controlling complex molecular structural dynamics on an ultrafast timescale. We report on a sub-20 fs, coherent mid-IR source with an octave-spanning spectral bandwidth ($>2000{\mathrm{cm}}^{-1}$) tunable from 2–8 micrometers (37.5–150 THz), with energy $>0.4\mathrm{\mu J}/\text{pulse}$ at 1 kHz. The mid-IR pulses are generated by four-wave mixing during the filamentation of intense 800 nm and 400 nm pulses in various gas media. Spectral tunability is achieved by the choice of gas, pressure and input 800 nm pulse energy.

©2012 Optical Society of America

Octave-spanning mid-infrared pulses by plasma generation in air pumped with an Yb:KGW source

Jinqing Huang, Alexander Parobek, and Ziad Ganim
Opt. Lett. 41(21) 4855-4858 (2016)

White light generation over three octaves by femtosecond filament at 3.9 µm in argon

Daniil Kartashov, Skirmantas Ališauskas, Audrius Pugžlys, Alexander Voronin, Aleksei Zheltikov, Massimo Petrarca, Pierre Béjot, Jérôme Kasparian, Jean-Pierre Wolf, and Andrius Baltuška
Opt. Lett. 37(16) 3456-3458 (2012)

Compression of tunable broadband mid-IR pulses with a deformable mirror pulse shaper

Madhumitha Balasubramanian, Trevor L. Courtney, James D. Gaynor, and Munira Khalil
J. Opt. Soc. Am. B 33(10) 2033-2037 (2016)

Three-octave-spanning supercontinuum generation and sub-two-cycle self-compression of mid-infrared filaments in dielectrics

Houkun Liang, Peter Krogen, Ross Grynko, Ondrej Novak, Chun-Lin Chang, Gregory J. Stein, Darshana Weerawarne, Bonggu Shim, Franz X. Kärtner, and Kyung-Han Hong
Opt. Lett. 40(6) 1069-1072 (2015)

Generation of sub-two-cycle mid-infrared pulses by four-wave mixing through filamentation in air

Takao Fuji and Toshinori Suzuki
Opt. Lett. 32(22) 3330-3332 (2007)