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Optical pulse compression to 5.0 fs by use of only a spatial light modulator for phase compensation

Naoki Karasawa, Liming Li, Akira Suguro, Hidemi Shigekawa, Ryuji Morita, and Mikio Yamashita

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Abstract

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

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