Polarization conversion in cubic Raman crystals

Aaron McKay*, Alexander Sabella, Richard P. Mildren

*Corresponding author for this work

Research output: Contribution to journalArticle

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Abstract

Nonlinear conversion of unpolarized beams to lower frequencies is generally inefficient in χ(2) materials, as it is challenging to achieve phase-matching for input ordinary and extraordinary beams simultaneously in the normal dispersion regime. Here, we show that cubic Raman crystals having doubly and triply degenerate (E and F type) modes provide a method for efficient nonlinear frequency downconversion of an unpolarized beam and yield a linearly polarized output state. Using Mueller calculus, optimal crystal directions for such polarization conversion are determined. Using diamond, an example of an F-class Raman crystal, we have verified that such conversion is possible with near quantum-defect-limited slope efficiency and a linear polarization contrast of more than 23.9 dB.

Original languageEnglish
Article number41702
Pages (from-to)1-8
Number of pages8
JournalScientific Reports
Volume7
DOIs
Publication statusPublished - 7 Feb 2017

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Copyright The Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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