High-energy laser homogenizing cavity attenuator
Patent Information
- Authority / Receiving Office
- CN · China
- Current Assignee / Owner
- NORTHWEST INST OF NUCLEAR TECH
- Publication Date
- 2014-03-19
Smart Images
Figure 1 Figure 2 Figure 3
Abstract
Description
technical field
[0001] The invention relates to an attenuator for high-energy laser beams, in particular to an array attenuator for measuring high-energy laser beams. Background technique
[0002] In the measurement of high-energy laser parameters, it is necessary to obtain the spatiotemporal distribution of laser light intensity. Since the laser power density at the test position is generally high, reasonable attenuation is required to detect it with a photodetector array arranged in an area array.
[0003] At present, the commonly used optical attenuation methods mainly include the filter attenuation method and the integrating sphere attenuation method, that is, an optical attenuator is added in front of each detector to attenuate the power of the laser to within the detectable range of the detector. Because the attenuation coefficient of the filter is difficult to accurately calibrate when it is attenuated by a large multiple, and the power meter for calibration is high, ...