摘要
多波段激光合束技术在光电对抗领域的应用越来越受到重视,基于此提出了一种使用折射棱镜组的多波段激光合束方法,优选了牌号依次为H-ZLaF92、D-ZLaF85LS、H-ZBaF21的3种火石玻璃作为棱镜材料,通过对棱镜组的顶角值、入射角度以及位置关系的计算和仿真,设计了包含调整镜组、折射棱镜组、反射镜组和偏振滤光片的合束方案,同时利用将单一线性偏振激光束电矢量方向调整为平行于入射面的方法减小反射损耗。分析计算表明:在波长分别为550 nm、1060 nm、2000 nm情况下,入射角分别选择63.05°、61.35°、59.58°,3种材料的棱镜顶角值分别取51°、55°、60°;在光斑间距ΔX1、ΔX2分别为10 mm、20 mm的情况下,3种材料对应棱镜的远表面距离D、近表面距离d分别为289 mm、83.5 mm,366.4 mm、107.7 mm,381.6 mm、103.6 mm;在不进行光学镀膜的情况下,仅使用单一线性偏振光以布儒斯特角入射,也能够达到92.8%~97.6%的合束效率,与现有多波段合束技术相比,在成本方面有巨大的优势。
The application of laser multibeam combining technology in the field of electro-optical countermeasures is receiving increased attention.This study proposes a laser multibeam method using a refractive prism group and three flint glasses(grades H-ZLaF92,D-ZLaF85LS,and H-ZBaF21)as the prism materials.By calculating and simulating the vertex angle,incident angle,and position relationship of the prism group,a beam combination scheme is designed based on the use of an adjusting mirror group,refracting prism group,reflecting mirror group,and polarizing filter.The reflection loss is reduced by adjusting the electric vector direction of a single,linearly polarized laser beam parallel to the incident plane.The analysis and calculations show that the wavelengths,incident angles,and apical prism angles of the three materials are 550,1060,and 2000 nm;63.05,61.35,and 59.58;and 51,55,and 60,respectively.When the spot distancesΔX1 andΔX2 are 10 and 20 mm,respectively,the far surface distance D and near surface distance d values of the three materials corresponding to the prisms are 289 and 83.5 mm;366.4 and 107.7 mm;and 381.6 and 103.6 mm,respectively.Without optical coating,a beam combining efficiency in the range of 92.8%‒97.6%can be achieved using only a single linearly polarized light incident at the Brewster angle.Compared with the existing laser multibeam method,the proposed method has considerable cost advantages.
作者
兰江
何衡湘
陈俊
王陈
程帅
张凌鹏
石康旺
邹硕颐
丛俊凯
Lan Jiang;He Hengxiang;Chen Jun;Wang Chen;Cheng Shuai;Zhang Lingpeng;Shi Kangwang;Zhou Shuoyi;Cong Junkai(Southwest Institute of Technical Physics,Chengdu 610041,Sichuan,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第17期236-242,共7页
Laser & Optoelectronics Progress
关键词
激光合束
多波段合束
折射棱镜
p偏振
合束效率
laser beam combination
multibeam combining
refractive prism
p polarization
beam combining efficiency
