On-line parameters measurement method for high energy laser with large beam profile

A novel on-line measurement method for continuous wave high energy laser beam is presented. The system based on this method is mainly consisted of a scanning circular reflector and a photoelectric detector array disposed along the circumference of the pan. The laser beam passing through the system except a little sample light is reflected into the detector array. Through the arithmetic of spatial mapping and image restoration with the output signal of detector array, the spatial-temporal distribution of the laser beam parameters is obtained. This method can be used to measure the high energy laser beam on-line with several hundred micrometers in diameter. The spatial resolution is 2 mm and the temporal resolution is 30~50 ms.