Gain and index guiding in a Raman generator with diffraction-free pump beams

Gain spectrum for a diffraction-free solution of the steady-state paraxial wave equation for the Stokes amplitude is shown to be frequency-asymmetric relative to an exact Raman resonance. The asymmetry is directly related to a light guiding originated due to Raman-induced change of the refractive in...

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Bibliographic Details
Published in:Journal of optics (2010) 2017-01, Vol.19 (1), p.15503
Main Authors: Chulkov, R V, Apanasevich, P A, Orlovich, V A
Format: Article
Language:English
Subjects:
diffraction-free light beam
optical gain guide
refractive index change
stimulated Raman scattering
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Summary:Gain spectrum for a diffraction-free solution of the steady-state paraxial wave equation for the Stokes amplitude is shown to be frequency-asymmetric relative to an exact Raman resonance. The asymmetry is directly related to a light guiding originated due to Raman-induced change of the refractive index and imprinted in the Stokes far field. The index guiding with a zero-order Bessel beam pump is experimentally observed at the Stokes generation in high-pressure hydrogen and barium nitrate, and reasonable agreement with numerical data is demonstrated.
ISSN:2040-8978
2040-8986
DOI:10.1088/2040-8986/19/1/015503