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Proceedings Paper

Newly observed nonlinear scattering feature occurring in optically pumped cylindrical liquid jets
Author(s): Thomas E. Ruekgauer; Paul Nachman; Jing-Gang Xie; Robert L. Armstrong
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Paper Abstract

Stimulated Raman scattering (SRS) produced by a high intensity laser (Nd:YAG) pulse illuminating a micron-sized cylindrical liquid jet will be discussed. Due to reflection at the liquid-air interface, a cylindrical jet can act as a `leaky' optical resonator, providing the necessary feedback for the generation of the nonlinear SRS. The spectral character of SRS generated in a dielectric cylinder is discrete, with the emission maxima corresponding to normal mode frequencies of a cylindrical microcavity. Results from our experiments incorporating an auxiliary source of light passing through the SRS-generation region of the cylinder reveal that the SRS fields can grown to intensities high enough to drive nonlinear index of refraction changes (n2 or other processes) in the liquid. This process is conjectured to be responsible for the existence of a previously unreported, spatially localized, nonlinear scattering feature, appearing as a ring of light in the SRS-generation region. In this presentation, we describe characteristics of the ring feature and provide evidence for the importance of self-focusing in its generation.

Paper Details

Date Published: 10 May 1996
PDF: 12 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239674
Show Author Affiliations
Thomas E. Ruekgauer, New Mexico State Univ. (United States)
Paul Nachman, New Mexico State Univ. (United States)
Jing-Gang Xie, Novatec Inc. (United States)
Robert L. Armstrong, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 2700:
Nonlinear Frequency Generation and Conversion
Mool C. Gupta; William J. Kozlovsky; David C. MacPherson, Editor(s)

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