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Proceedings Paper

Nonlinear wave-mixing spectroscopy for sub-Doppler isotope analysis with trace-level detection sensitivity
Author(s): Wendy Lyons; Julia Schafer; Ron Briggs; Marc Gregerson; William G. Tong
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Paper Abstract

Nonlinear spectroscopic method based on degenerate four-wave mixing allows unusually sensitive measurement of isotopes and hyperfine profiles with sub-Doppler spectral resolution. Compared to other isotope capable methods including mass spectrometry, wave mixing offers a simple, more cost effective approach with minimal sample preparation steps. Since no two hyperfine profiles are alike, hyperfine-based isotope analysis offers unambiguous isotope information. Unlike mass-based methods such as mass spectrometry, frequency-based wave-mixing spectroscopy offers more information rich spectra. A non-planar 3-D wave-mixing optical setup generates a coherent signal beam in its own space and propagation direction. Hence, virtually 100% of the signal can be collected and detected conveniently. Using compact solid-state lasers and popular atomizers, a wave-mixing setup is relatively compact. Sub-Doppler spectral resolution can be further enhanced by using simple low-pressure atomizers. Ultrasensitive fingerprinting of important isotopes promises many potential applications.

Paper Details

Date Published: 30 September 2005
PDF: 6 pages
Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 597109 (30 September 2005); doi: 10.1117/12.629841
Show Author Affiliations
Wendy Lyons, San Diego State Univ. (United States)
Julia Schafer, San Diego State Univ. (United States)
Ron Briggs, San Diego State Univ. (United States)
Marc Gregerson, San Diego State Univ. (United States)
William G. Tong, San Diego State Univ. (United States)

Published in SPIE Proceedings Vol. 5971:
Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics
Roberto A. Morandotti; Harry E. Ruda; Jianping Yao, Editor(s)

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