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Moment-based Description for Assumption-free Single-shot Measurement of Femtosecond Laser Pulse Parameters via Two-photon-induced Photocurrents

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5 Author(s)
Eric R. Tkaczyk ; Medical Scientist Training Program and Center for Ultrafast Optical Science, 2200 Bonisteel Boulevard, University of Michigan, Ann Arbor, MI 48109-2099. phone: +1 734-763-0209; fax: +1 734-763-4876; e-mail: etkaczyk@umich.edu ; Sylvain Rivet ; Lionel Canioni ; Stephane Santran
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By examining the first- and second-order moments of intensity with respect to time and frequency, we arrive at a temporal characterization of laser pulses through parameters for pulse duration, group delay dispersion and temporal form. These parameters, which are sufficient to predict subsequent pulse behavior, are recoverable in a simple experiment, measuring the two-photon-induced photocurrents in three nonlinear diodes. With only two photodiodes, we demonstrate that pulse durations as low as several tens of femtoseconds can be easily measured in a single shot, if the usual assumptions of pulse form and dispersion are made as in the more difficult autocorrelation setup.

Published in:

2006 Northern Optics

Date of Conference:

14-16 June 2006