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Femtosecond imaging with digital holography

Pu, Ye and Centurion, Martin and Psaltis, Demetri (2006) Femtosecond imaging with digital holography. In: Optical Information Systems IV. Proceedings of SPIE. No.6311. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 63111K.

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We describe a holographic technique capable of sampling dynamic events at 150 femtosecond time resolution. We apply the technique to the study of the nonlinear propagation of high energy pulses through gas and condensed media. The holograms are recorded as a digitized image from a CCD camera and reconstructed numerically to retrieve the refractive index change during the nonlinear optical process. We show dramatic differences in the pulse propagation characteristics depending on the strength of the nonlinear coefficient of the material and it's time response. Both positive and negative index changes have been measured in different media. The holographic technique allows us to distinguish the very fast positive index changes that are generally attributable to the Kerr nonlinearity from the negative index changes that result from free electrons generated by multiphoton ionization.

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Additional Information:© 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). The authors wish to thank Zhiwen Liu and Theodor W. Hänsch for helpful discussions. This research was supported by the Defense Advanced Research Projects Agency Center for Optofluidic Integration. Funding for M. Centurion was provided through the Center for the Physics of Information as part of the Caltech Information Science and Technology initiative.
Funding AgencyGrant Number
Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Center for the Physics of Information, CaltechUNSPECIFIED
Subject Keywords:Holography, Kerr effect, Self-focusing, Optical filamentation, Optical turbulence, Phase retrieval
Series Name:Proceedings of SPIE
Issue or Number:6311
Record Number:CaltechAUTHORS:20191106-132650641
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Official Citation:Ye Pu, Martin Centurion, and Demetri Psaltis "Femtosecond imaging with digital holography", Proc. SPIE 6311, Optical Information Systems IV, 63111K (30 August 2006);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99701
Deposited By: Tony Diaz
Deposited On:06 Nov 2019 22:21
Last Modified:06 Nov 2019 22:21

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