A compound detector array for the measurement of large area laser beam intensity distribution

Abstract

A synthesis of the calorimetric and photoelectric method on the high energy laser beams measurement is presented. Data fusion of the two kinds of detector units is achieved with real-time scaling onsite. A set of compound diagnostic system is developed for the large area laser beam intensity distribution measurement, which is mainly composed of 256 calorimetric detectors, 120 photoelectric detectors, multi-channel data sampling module and one central processing computer. The total energy of the laser beam is accurately measured with calorimetric detectors, and the spatial intensity distribution with high temporal resolution is given by the photoelectric detectors. With the merits of energy accuracy and the temporal resolution based on the two kinds of detector units, the compound diagnostic system can be used to measure accurately the far-field temporal and spatial distribution of high energy laser beams.

Study on Laser Parameter Measurement System Based on Cone-Arranged Fibers and CCD Camera

“…The laser parameter is an essential indicator in the scientific evaluation of laser systems. Typical laser parameters, such as beam width, β factor, and M 2 factor, can be obtained by measuring the intensity distribution of one or more axial cross-section spots [ 1 , 2 , 3 ]. When the spot is large, the measurement system prioritizes the array target composed of attenuation and detection units [ 4 , 5 , 6 , 7 ].…”