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Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas

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Abstract

We present results of measurements of fluorescence spectra due to the interaction of a Ti:sapphire laser pulse with N2 molecules at different gas pressures and pulse energies. The analysis of the data together with the results of numerical simulations, using a propagation model, reveal signatures of the phenomena of intensity clamping and of re-focusing of the laser pulse at high gas pressure. The laser pulse energy for intensity clamping as a function of the gas pressure is determined.

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Received: 21 May 2001 / Revised version: 10 July 2001 / Published online: 19 September 2001

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Becker, A., Aközbek, N., Vijayalakshmi, K. et al. Intensity clamping and re-focusing of intense femtosecond laser pulses in nitrogen molecular gas. Appl Phys B 73, 287–290 (2001). https://doi.org/10.1007/s003400100637

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  • DOI: https://doi.org/10.1007/s003400100637

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