Sampling and measuring system for high-energy-intensity continuous laser beam quality factor

Abstract

The invention relates to the field of lasers, particularly to a sampling and measuring system for a high-energy-intensity continuous laser beam quality factor. The sampling and measuring system is characterized by at least comprising an incident to-be-measured laser, a control laser (2), an energy absorption medium (3), a sampling device (11), an imaging lens (6), a CCD rapid camera (7), an optical translation stage (8), a photomultiplier (9) and an image acquisition and control system (10), wherein the incident to-be-measured laser (1) passes through an incident to-be-measured laser path of the sampling device (11) and reaches the CCD rapid camera (7) through the imaging lens (6), and the control laser (2) passes through a control laser light path of the sampling device (11) and reaches the image acquisition and control system (10) through the photomultiplier (9). The invention provides the sampling and measuring system of a high-energy-intensity continuous laser beam quality factor,so that the beam quality is not influenced when the beam quality and energy are detected, and the high-quality sampling measurement of the continuous laser beam quality factor is realized.

Description

technical field [0001] The invention relates to the laser field, in particular to a sampling measurement system for the quality factor of a high-energy continuous laser beam. Background technique [0002] Due to its high energy density and high power density, high-energy laser has important application value in the fields of science and technology, military affairs, and industry. Its effect mainly depends on the power density acting on the target, and the power density on the target depends not only on The output power of the laser is also related to the beam quality of the output laser. Beam quality and beam transmission characteristics are an important field of laser optics research, which can provide a theoretical basis for optical system design, beam transmission transformation and beam quality control; among them, direct measurement using CCD is an important method to measure the quality factor of high-energy and strong laser beams . [0003] Limited by the dynamic re...

AI Technical Summary

Problems solved by technology

The commonly used attenuation method is an attenuation system composed of attenuators. The attenuation system is composed of reflective attenuators and transmissive attenuators. It involves changes in the optical path of the optical system. The design of the entire device will introduce aberrations; at the same time, it is subject to mechanical The accuracy of the positioning device is affected. Adding optical components will increase the uncertainty of the entire measurement system and affect the accuracy

[0004] At the same time, after the attenuation device is introduced, a large number of high-order components of the light intensity distribution will be filtered, and the complete light intensity distribution and accurate spot size cannot be obtained; after the attenuation, the proportion of stray light in the detection system increases, and the CCD background Grayscale and noise interference will have a great impact on image quality

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