Discrimination of the glucose and the white sugar based on the pulsed laser-induced photoacoustic technique

Zhong Ren; Guodong Liu

doi:10.1117/12.2269390

1 August 2017 Discrimination of the glucose and the white sugar based on the pulsed laser-induced photoacoustic technique

Zhong Ren, Guodong Liu

Author Affiliations +

Proceedings Volume 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers; 103391K (2017) https://doi.org/10.1117/12.2269390
Event: Pacific Rim Laser Damage 2017: Optical Materials for High Power Lasers, 2017, Shanghai, China

Abstract

In this study, to discriminate the glucose and the white sugar gradient in the food, a noninvasive optical detection system based on pulsed laser-induced photoacoustic technique was developed. Meanwhile, the Nd: YAG 532nm pumped OPO pulsed laser was used as the excitation light source to generate of the photoacoustic signals of the glucose and white sugar. The focused ultrasonic transducer with central detection frequency of 1MHz was used to capture the photoacoustic signals. In experiments, the real-time photoacoustic signals of the glucose and the white sugar aqueous solutions were gotten and compared with each other. In addition, to discriminate the difference of the characteristic photoacoustic signals between both of them, the difference spectrum and the first order derivative technique between the peak-to-peak photoacoustic signals of the water and that of the glucose and white sugar were employed. The difference characteristic photoacoustic wavelengths between the glucose and the white sugar were found based on the established photoacoustic detection system. This study provides the potential possibility for the discrimination of the glucose and the white sugar by using the photoacoustic detection method.

Citation Download Citation

Zhong Ren and Guodong Liu "Discrimination of the glucose and the white sugar based on the pulsed laser-induced photoacoustic technique", Proc. SPIE 10339, Pacific Rim Laser Damage 2017: Optical Materials for High-Power Lasers, 103391K (1 August 2017); https://doi.org/10.1117/12.2269390

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