Abstract

In this work, we experimentally demonstrate the generation of 30 nm of spectral broadening in a bulk cadmium sulfide (CdS) semiconductor generated by a 280 fs long pulse at 1.024 µm wavelength and with a microjoule energy level. Using second-harmonic generation in barium borate, the complex ring pattern induced by self-focusing due to the strong nonlinear interaction of the laser pulse in the pair of CdS crystals is filtered out using second-harmonic nonlinear crystal to recover a Gaussian shape spatial profile. We also present the temporal compression of the resulting 512 nm laser pulse up to 45 fs by using a pair of standard transmissive gratings, leading to a pulse compression factor of 6.13. This technique is compact, inexpensive, and robust and produces ultrafast optical pulses from an input laser pulse whose duration and energy range are generally incompatible with a straightforward compression method in nonlinear optical fibers.

© 2021 Optical Society of America

Spectral broadening and a prospect for pulse compression of Yb:YAG thin-disk laser pulses by nonlinear SHG in a BBO crystal with time predelay and tilting of the pulse fronts

Martin Duda, Ondřej Novák, Martin Cimrman, Jaroslav Huynh, Martin Smrž, and Tomáš Mocek
Opt. Continuum 1(1) 16-29 (2022)

Few-cycle 10 µm multi-terawatt pulse self-compression in a gas-filled multi-pass cell: a numerical experiment

Michael G. Hastings, Paris Panagiotopoulos, Miroslav Kolesik, Victor Hasson, Sergei Tochitsky, and Jerome V. Moloney
J. Opt. Soc. Am. B 39(1) 266-272 (2022)

Numerical study of sum frequency ultrashort pulse compression in borate crystals

Martin Duda, Ondřej Novák, Martin Smrž, Antonio Lucianetti, Václav Kubeček, and Tomáš Mocek
J. Opt. Soc. Am. B 37(11) 3229-3238 (2020)

Nonlinear compression in a rod-type fiber for high energy ultrashort pulse generation

Igor Martial, Dimitris Papadopoulos, Marc Hanna, Frédéric Druon, and Patrick Georges
Opt. Express 17(13) 11155-11160 (2009)

High-energy pulse compression by use of negative phase shifts produced by the cascade ?⁽²⁾:?⁽²⁾ nonlinearity

Xiang Liu, Liejia Qian, and Frank Wise
Opt. Lett. 24(23) 1777-1779 (1999)