摘要
The general description of photoacoustic (PA) signal generation in liquids developed in our earlier paper [J. Appl. Phys. 55, 4005 (1984)] was extended to analyze PA signal detection. The dependence of detected PA signal magnitude on the excitation beam profile and cell geometry of the cylindrical direct coupling cell was obtained theoretically. The thermal lens effect was clarified to be one of the dominant factors for determination of an acoustic source profile in liquids. These theoretical results were confirmed experimentally. Theoretical, optimized detection conditions for a highly sensitive cell (under a near-field condition) and a wide dynamic range cell (under a far-field condition) were proposed.