Optimization of the Acoustic Pressure Distribution in a Resonant Photoacoustic Cell

HAO Luyuan; REN Zhi; SHI Qiang; ZHENG Yan; ZHENG Jingjing; ZHU Qingshi

Chinese Journal of Lasers B, 2001, 10 (2): 107, 网络出版: 2006-08-10

Optimization of the Acoustic Pressure Distribution in a Resonant Photoacoustic Cell

论文大纲

HAO Luyuan REN Zhi SHI Qiang ZHENG Yan ZHENG Jingjing ZHU Qingshi

作者单位

Open Laboratory of Bond Selective Chemistry, University of Science and Technology of China, Hefei 230026, China

photoacoustic spectrum acoustic mode resonant coupl

摘要

Abstract

The size of a cylindrical photoacoustic cell with suitable size was selected so that the resonant frequency of the first radial mode was equal to that of a longitudinal higher mode. By maintaining two thin coaxial tubes at each end, a enhanced photoacoustic cell was constructed with two tubes of 1/2 and 1/4 of the wavelength. In this enhanced photoacoustie cell, both the first radial resonance and the higher longitudinal resonance were excited adequately. Coupling of two acoustic modes makes the acoustic energy concentrating in the middle of the cell. The surface loss was decreased, the acoustic quality factor and pressure amplitude increased obviously as compared with conventional cylindrical cell.

参考文献

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HAO Luyuan, REN Zhi, SHI Qiang, ZHENG Yan, ZHENG Jingjing, ZHU Qingshi. Optimization of the Acoustic Pressure Distribution in a Resonant Photoacoustic Cell[J]. Chinese Journal of Lasers B, 2001, 10(2): 107. HAO Luyuan, REN Zhi, SHI Qiang, ZHENG Yan, ZHENG Jingjing, ZHU Qingshi. [J]. 中国激光(英文版), 2001, 10(2): 107.

Optimization of the Acoustic Pressure Distribution in a Resonant Photoacoustic Cell

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