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Proceedings Paper

Stimulated rotational Raman scattering in H2
Author(s): Bruce G. Oldaker; Timothy Pritchett; Thomas R. Moore
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Paper Abstract

The development of stimulated emission from molecular transitions between vibrational energy levels of diatomic gases exposed to high intensity laser pulses through the Raman effect has been studied for many years. The energy levels are non-degenerate, the pump pulse is usually linearly polarized, and there are amenable classical models of the scattering. We have started a research program to study the development and gain of stimulated emission from molecular transitions between rotational energy levels in molecular hydrogen when exposed to a high intensity laser pulse. The rotational energy levels are necessarily degenerate in angular momentum and therefore the scattering is sensitive to the angular momentum of the pump light, i.e. its polarization. We present initial experimental verification of simplified classical theories for the polarization dependence of this type of scattering for the Stokes radiation and the Stokes--Anti-Stokes coupling common to all Raman scattering. Extensions of the classical theory to higher rotational orders and similarities and differences to stimulated vibrational Raman scattering and plans for further experiments are discussed. An exciting prospect is the prediction of generating coherent emission at the rotational Raman frequency itself by using an electric field perpendicular to the laser's direction of propagation.

Paper Details

Date Published: 10 May 1996
PDF: 8 pages
Proc. SPIE 2700, Nonlinear Frequency Generation and Conversion, (10 May 1996); doi: 10.1117/12.239675
Show Author Affiliations
Bruce G. Oldaker, U.S. Military Academy (United States)
Timothy Pritchett, U.S. Military Academy (United States)
Thomas R. Moore, U.S. Military Academy (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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