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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)
Tkaczyk, E.R. ; Med. Scientist Training Program & Center for Ultrafast Opt. Sci., Michigan Univ., Ann Arbor, MI ; Rivet, S. ; Canioni, L. ; Santran, S.
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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:

Northern Optics, 2006

Date of Conference:

14-16 June 2006

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