We experimentally demonstrate the generation of 5.0-fs optical pulses (2.5 μJ, 1-kHz repetition rate), using only a spatial light modulator for phase compensation. Pulse compression of the broadband pulse (500–1000 nm) from an argon-filled capillary fiber is achieved with a liquid-crystal spatial light modulator without any prechirp compensation. The output pulse width is found to be 4.1 fs by a fringe-resolved autocorrelator fitted with a transform-limited pulse and to be 5.0 fs by second-harmonic generation frequency-resolved optical gating with marginal correction. It is to our knowledge the shortest pulse ever generated by use of only a spatial light modulator for phase compensation.
© 2001 Optical Society of America
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(230.6120) Optical devices : Spatial light modulators
(320.5520) Ultrafast optics : Pulse compression
(320.7090) Ultrafast optics : Ultrafast lasers
(320.7140) Ultrafast optics : Ultrafast processes in fibers
Naoki Karasawa, Liming Li, Akira Suguro, Hidemi Shigekawa, Ryuji Morita, and Mikio Yamashita, "Optical pulse compression to 5.0 fs by use of only a spatial light modulator for phase compensation," J. Opt. Soc. Am. B 18, 1742-1746 (2001)