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
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.
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.