Photodetector Array Target Calibration Technology

In order to achieve quantitative measurement of the spatial and temporal distribution of far-field laser spot, it is necessary to solve the calibration problem of the photodetector array target measurement system. For the photodetector array target calibration system, the unit detector is scanned one by one, and the unit detector is regarded as a black box. Its input and output correspond to the voltage pulse amplitude and the energy density of the laser beam respectively, in order to meet the energy density. The measured value of the measured value and the actual value of the project indicator, the segmentation relationship between the energy density of the photodetector and the amplitude of the voltage pulse is derived. The verification test shows that the error of the energy density measurement and the calibration true value of the verification test is less than 15% at a small energy density, and the error is less than 10% at a larger energy density. This calibration method has the advantages of simple operation and high calibration accuracy, and has guiding significance for future photodetector array target calibration technology.