中国光学（中英文）2024，Vol.17Issue(4)：932-942,11.DOI:10.37188/CO.2023-0228
大口径多波段光束质量检测系统设计
Design of large-aperture multi-band beam quality detection system
摘要
Abstract
Spectral synthesis technology is an important technical approach to achieving high-energy laser output.Ensuring high-quality laser output under the premise of high-power output has become the most ur-gent goal in further developing spectral synthesis technology.Aiming at the challenge of parameter detection for 155 mm×140 mm rectangular aperture,(1064±3)nm,(1030±3)nm,and(635±5)nm band beams,we design a large-aperture multi-band multi-parameter detection system.The wavefront detection unit is based on Kepler's telescopic structure,the conjugate relationship between the deformable mirror and the mi-crolens is constructed,at the same time,the compressed beam matches the detector size.The front group ob-jective lenses adopt a Cassegrain structure to solve the problem of color difference correction in large-aper-ture and multi-band.The rear group of mirrors adopts a three-piece apochromatic refractor group,which compensates for the color difference while accounting for the non-thermal design.It can be used for com-pensation to the residual thermal difference of the front group of objectives and the thermal difference of the rear group of mirrors.After passing through the wavefront detection unit,the beam quality and beam uni-formity can be measured.In order to improve the environmental adaptability of the system,it was designed through an optical passive anthermic method at 20°C±10°C.Finally,the system was installed and tested,and the wavefront spot image collected by the wavefront detection camera was restored using the Zernike wavefront restoration method.The measured RMS value of the wavefront of the system is better than 0.0524 λ(λ=632.8 nm),the beam uniformity is better than 0.893,and the beam quality β factor is better than 1.26 times the diffraction limit at 10°C-30°C.关键词
多波段多参数检测/无热化设计/波前测量/光束均匀性/光束质量Key words
multi-band multi-parameter detection/non-thermalized design/wavefront measurement/beam uniformity/beam quality分类
矿业与冶金引用本文复制引用
刘才,于信,潘国涛,贺国强,倪小龙,白素平..大口径多波段光束质量检测系统设计[J].中国光学（中英文）,2024,17(4):932-942,11.基金项目
国家自然科学基金青年基金资助项目(No.62205032) （No.62205032）
吉林省科技发展计划项目(No.20210201139GX) （No.20210201139GX）
长春理工大学青年基金(No.XQNJJ-2019-01)Supported by Youth Fund of the National Natural Science Foundation of China(No.62205032) （No.XQNJJ-2019-01）
Science and Technology Development Project of Jilin Province(No.20210201139GX) （No.20210201139GX）
Youth Fund of Changchun Uni-versity of Science and Technology(No.XQNJJ-2019-01) （No.XQNJJ-2019-01）
