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Proceedings Paper

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

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.

Paper Details

Date Published: 17 March 2005
PDF: 4 pages
Proc. SPIE 5580, 26th International Congress on High-Speed Photography and Photonics, (17 March 2005); doi: 10.1117/12.584170
Show Author Affiliations
Martin Centurion, California Institute of Technology (United States)
Ye Pu, California Institute of Technology (United States)
Demetri Psaltis, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5580:
26th International Congress on High-Speed Photography and Photonics
Dennis L. Paisley; Stuart Kleinfelder; Donald R. Snyder; Brian J. Thompson, Editor(s)

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