Nonlinear wave-mixing spectroscopy for sub-Doppler isotope analysis with trace-level detection sensitivity

Wendy Lyons; Julia Schafer; Ron Briggs; Marc Gregerson; William G. Tong

doi:10.1117/12.629841

30 September 2005 Nonlinear wave-mixing spectroscopy for sub-Doppler isotope analysis with trace-level detection sensitivity

Wendy Lyons, Julia Schafer, Ron Briggs, Marc Gregerson, William G. Tong

Author Affiliations +

Proceedings Volume 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics; 597109 (2005) https://doi.org/10.1117/12.629841
Event: Photonics North, 2005, Toronto, Canada

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.

Citation Download Citation

Wendy Lyons, Julia Schafer, Ron Briggs, Marc Gregerson, and William G. Tong "Nonlinear wave-mixing spectroscopy for sub-Doppler isotope analysis with trace-level detection sensitivity", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 597109 (30 September 2005); https://doi.org/10.1117/12.629841

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