Phase-matched high-order-harmonic generation by self-guided intense femtosecond laser pulses

Katsumi Midorikawa; Yusuke Tamaki; Jiro Itatani; Minoru Obara

doi:10.1117/12.366683

21 October 1999 Phase-matched high-order-harmonic generation by self-guided intense femtosecond laser pulses

Katsumi Midorikawa, Yusuke Tamaki, Jiro Itatani, Minoru Obara

Proceedings Volume 3776, Soft X-Ray Lasers and Applications III; (1999) https://doi.org/10.1117/12.366683
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

We describe the phase-matched high-order-harmonic generation of femtosecond Ti:sapphire laser pulses in a self-guiding channel. Generation efficiency of the high-order harmonic was improved by phase-matched propagation in the guiding channel. The harmonics around the 49th harmonic (16 nm) were enhanced by two orders of magnitude compared to those in the plateau with a 7-mm-long, self-guided pulse in Ne. High- harmonic conversion efficiency of 10^-6 was obtained, producing > nJ harmonics in the cutoff region around the 49th harmonic. The results are well explained by considering both the intrinsic phase based on the single-atom response and the macroscopic phase matching in the high-intensity interaction region.

Citation Download Citation

Katsumi Midorikawa, Yusuke Tamaki, Jiro Itatani, and Minoru Obara "Phase-matched high-order-harmonic generation by self-guided intense femtosecond laser pulses", Proc. SPIE 3776, Soft X-Ray Lasers and Applications III, (21 October 1999); https://doi.org/10.1117/12.366683

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