Open AccessOn-line beam diagnostic method for high energy laser with large beam profile
Author(s) -
Shaowu Chen,
Qunshu Wang,
Hong Zhao
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.011763
Subject(s) - optics , beam (structure) , laser , detector , m squared , reflector (photography) , laser beam quality , beam diameter , image resolution , beam parameter product , line (geometry) , energy (signal processing) , physics , materials science , laser beams , light source , geometry , mathematics , quantum mechanics
A novel on-line beam diagnostic method for continuous-wave high energy laser (HEL) is presented. The system based on this method is mainly consisted of a scanning circular reflector and a photodetector array disposed spatially. Laser beam passes through the system except a little part of whole beam is sampled and reflected into the detector array by the circular reflector. Through the arithmetic of spatial mapping and image restoration with the output signal of detector array, the spatial-temporal distribution parameters of the laser beam are obtained. The HEL beam of several hundred millimeters in diameter can be on-line measured with spatial resolution of 2 mm and temporal resolution of 30~50ms.