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http://dx.doi.org/10.3807/KJOP.2011.22.2.077

Enhancing the Reproducibility of a Photoacoustic Signal Using a Minimum-volume Cell  

Kim, Kyong-Seok (Department of Physics, Yonsei University)
Lee, Kew-Seung (Department of Physics, Yonsei University)
Ahn, Hong-Gyu (Department of Physics, Yonsei University)
Lee, Eung-Jang (Department of Physics, Yonsei University)
Kim, Dae-Kyu (Department of Physics, Yonsei University)
Park, Seung-Han (Department of Physics, Yonsei University)
Publication Information
Korean Journal of Optics and Photonics / v.22, no.2, 2011 , pp. 77-82 More about this Journal
Abstract
Reproducibility obtained by a minimum-volume cell for photoacoustic (PA) signals is strongly dependent upon the sealing materials and sealing efficiency. Therefore, we have proposed, designed, and constructed an apparatus to enhance the sealing efficiency, and we have examined the reproducibility of amplitude and phase of PA signals with a minimum-volume cell. In particular, we have measured the PA signal as a function of modulation frequency for various rubber O-rings by using our apparatus. The results show that a silicon rubber O-ring can improve the reproducibility of the PA signal and phase by up to 53.4% and 80.4%, respectively, compared to that obtained by using the conventional sealing material, vacuum grease.
Keywords
Photoacoustic signal; Photoacoustic cell; Minimum volume cell; Reproducibility;
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