Evaluation method for Raman depolarization measurements including geometrical effects and polarization aberrations

• DOI: 10.1002/jrs.4201
• Publication Date: 2013-01-25T04:04:42Z
• Authors: M. Schlösser; T. M. James; S. Fischer; R. J. Lewis; B. Bornschein; H. H. Telle
• Keywords: Depolarization ratio; Optical path

In this article, we address the notoriously difficult problem to quantitatively link measured Raman depolarization values theoretical polarizability tensor quantities, since quantum calculations do not incorporate experimental parameters. For this, introduce a numerical model calculate, for realistic configurations, effective line strength functions, Φ , which find their way into ratios, ρ . The is based on interlinked integrations over angles in light collection path and finite source volume along excitation laser beam. deals also with conditional aperture parameters, associated more than one optical component path. Finally, can take account polarization aberrations introduced by sample cell windows. procedure was fully tested spectra of selected hydrogen isotopologues. Distinct aspects affecting data were validated, namely: (1) impurities; (2) extended volumes; (3) solid angles; (4) optics correction measurement aforementioned effects resulted ratios Q 1 ( J " ) lines H 2 T mostly differed less 5% from those obtained quantum‐calculations. Copyright © 2013 John Wiley & Sons, Ltd.