Optoacoustic detection of different doping substances commonly used by athletes with an optical parametric generation laser source

Cornelia Fischer; Richard Bartlome; Markus W. Sigrist

doi:10.1117/12.588277

25 April 2005 Optoacoustic detection of different doping substances commonly used by athletes with an optical parametric generation laser source

Cornelia Fischer, Richard Bartlome, Markus W. Sigrist

Author Affiliations +

Proceedings Volume 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; (2005) https://doi.org/10.1117/12.588277
Event: SPIE BiOS, 2005, San Jose, CA, United States

Abstract

In this paper, we present first results of a spectral characterisation of doping substances using a resonant optoacoustic cell and a Nd:YAG laser pumped optical parametric generation (OPG) laser source in the mid-infrared wavelength range between 3.0 and 4.0 μm with periodically poled LiNbO₃ as nonlinear medium for the frequency conversion. Single spectra covering a wavelength range of about 220 nm can be conducted within less than 2 hours (3s averaging time, 7s between consecutive data points, about 0.3nm step-width). Despite the large linewidth of the OPG source of 240 GHz (8 cm-1), the laser spectrometer is well suited for the spectral analysis of these large organic molecules as they exhibit structured continuum absorption over a wide spectral range rather than isolated absorption peaks. We present measured spectra of ephedrine, alprenolol, ethacrynic acid, etc. and discuss the potential of laser-based detection of doping substances both as a supplement to existing methods and in view of a fast in situ screening technique at sporting events.

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Cornelia Fischer, Richard Bartlome, and Markus W. Sigrist "Optoacoustic detection of different doping substances commonly used by athletes with an optical parametric generation laser source", Proc. SPIE 5697, Photons Plus Ultrasound: Imaging and Sensing 2005: The Sixth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, (25 April 2005); https://doi.org/10.1117/12.588277

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