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Visualization of optical pulse filamentation by femtosecond time-resolved optical polarigraphy

Centurion, Martin and Pu, Ye and Psaltis, Demetri (2005) Visualization of optical pulse filamentation by femtosecond time-resolved optical polarigraphy. In: 26th International Congress on High-Speed Photography and Photonics. Proceedings of SPIE. No.5580. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 320-323. ISBN 9780819455307.

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We have observed the filamentation of optical pulses in carbon disulfide(CS2) using femtosecond time-resolved optical polarigraphy(FTOP). A pump-probe setup is used to capture the propagation of a 150 femtosecond laser pulse in CS2. The probe pulse propagates in a direction perpendicular to the pump. The high intensity of the pump pulse causes a transient index change in the material through the Kerr effect. The induced birefringence is proportional to the intensity of the pump and can be captured by monitoring the polarization of the probe. The probe pulse is imaged on a CCD camera to recover the intensity profile of the pump pulse. We have used this technique to observe the spatial evolution of the pulse as a function of power and propagation distance. Initially, the pulse propagation causes a coarse redistribution of the intensity. The beam then breaks up into stable light filaments which propagate for several millimeters, and finally the beam profile becomes unstable to small fluctuations in the input power.

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Additional Information:© 2005 Society of Photo-optical Instrumentation Engineers. This work was supported by the Engineering Research Centers Program of the National Science Foundation under award EEC-9402726 and the Center for Optofluidic Integration funded by the Defense Advance Research Projects Agency (DARPA).
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Defense Advanced Research Projects Agency (DARPA)UNSPECIFIED
Subject Keywords:femtosecond, polarigraphy, pulse propagation, filamentation, optical instability
Series Name:Proceedings of SPIE
Issue or Number:5580
Record Number:CaltechAUTHORS:20181219-110655665
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Official Citation:Martin Centurion, Ye Pu, Demetri Psaltis, "Visualization of optical pulse filamentation by femtosecond time-resolved optical polarigraphy," Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); doi: 10.1117/12.584170
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91916
Deposited By: Tony Diaz
Deposited On:19 Dec 2018 19:21
Last Modified:03 Oct 2019 20:39

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