Newly observed nonlinear scattering feature occurring in optically pumped cylindrical liquid jets

Thomas E. Ruekgauer; Paul Nachman; Jing-Gang Xie; Robert L. Armstrong

doi:10.1117/12.239674

10 May 1996 Newly observed nonlinear scattering feature occurring in optically pumped cylindrical liquid jets

Thomas E. Ruekgauer, Paul Nachman, Jing-Gang Xie, Robert L. Armstrong

Proceedings Volume 2700, Nonlinear Frequency Generation and Conversion; (1996) https://doi.org/10.1117/12.239674
Event: Photonics West '96, 1996, San Jose, CA, United States

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.

Citation Download Citation

Thomas E. Ruekgauer, Paul Nachman, Jing-Gang Xie, and Robert L. Armstrong "Newly observed nonlinear scattering feature occurring in optically pumped cylindrical liquid jets", Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); https://doi.org/10.1117/12.239674

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