We reported a new method for measuring the optical power of fast and ultrafast laser pulses. This type of measurements usually encounters some technical difficulties in field of experimental practice. The method is based on investigating the laser-induced photoacoustics (PA) inside a non- lambertian integrating sphere made of stainless steel. The measured laser beam is introduced inside the sphere, and then absorbed after a series of specular reflections on its reflective inner surface. These reflections induced a similar PA signal propagated through the spheres wall. A contact piezoelectric detector fixed outside the sphere is used to detected the resultant thermo-elastic vibrations. The study of the PA signals intensity lead to the measurement of laser power. A complete theoretical modeling, design, test and calibration procedure of such power meter are inclusive. This design is suitable for checking the output power of pulsed high power laser sources directly without splitting or damping.

我们报告了一种测量快速和超快速激光脉冲光功率的新方法。这种类型的测量通常在实验实践领域遇到一些技术难题。该方法基于调查由不锈钢制成的非朗伯积分球内部的激光诱导的光声（PA）。测得的激光束被引入球体内部，然后在其反射内表面上发生一系列镜面反射后被吸收。这些反射引起类似的PA信号通过球体壁传播。固定在球体外部的接触式压电检测器用于检测产生的热弹性振动。对PA信号强度的研究导致了激光功率的测量。完整的理论建模，设计，此功率计的测试和校准过程包括在内。此设计适用于直接检查脉冲高功率激光源的输出功率，而不会分裂或衰减。