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Enhanced temporal resolution in femtosecond dynamic-grating experiments

Hsieh, Hung-Te and Psaltis, Demetri and Beyer, Oliver and Maxein, Dominik and Buse, Karsten and Sturman, Boris (2005) Enhanced temporal resolution in femtosecond dynamic-grating experiments. Journal of Applied Physics, 97 (11). Art. No. 113107. ISSN 0021-8979. doi:10.1063/1.1927277.

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Recording of gratings by interference of two pump pulses and diffraction of a third probe pulse is useful for investigating ultrafast material phenomena. We demonstrate, in theory and experiment, that the temporal resolution in such configurations does not degrade appreciably even for large angular separation between the pump pulses. Transient Kerr gratings are generated inside calcium fluoride (CaF2) crystals by two interfering femtosecond (pump) pulses at 388 nm and read out by a Bragg-matched probe pulse at 776 nm. The solution to the relevant coupled-mode equations is well corroborated by the experimental results, yielding a value of the Kerr coefficient of ~ 4.4×10^(–7) cm^2/GW for CaF2.

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Additional Information:Copyright © 2005 American Institute of Physics. Received 3 December 2004; accepted 5 April 2005; published online 8 June 2005. We thankfully acknowledge the financial support from the NSF (Engineering Research Centers Program for Neuromorphic Systems Engineering under Award No. EEC-9402726, NSF-Germany Cooperative Research Grant No. INT-0233988), the Deutsche Telekom AG and the DFG (Award No. BU 913/13-1).
Subject Keywords:high-speed optical techniques; diffraction gratings; optical pumping; light interference; optical Kerr effect; calcium compounds; coupled mode analysis
Issue or Number:11
Record Number:CaltechAUTHORS:HSIjap05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3599
Deposited By: Tony Diaz
Deposited On:21 Jun 2006
Last Modified:08 Nov 2021 20:10

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