基于光纤端帽的红外宽波段耦合光学系统设计  

Design of Infrared Wide-Band Coupling Optical System Based on Fiber End Cap

作　　者：陈明亮 郝培育[2] 孟轩 蔡猛[2] Chen Mingliang;Hao Peiyu;Meng Xuan;Cai Meng(Science and Technology on ElectroOptical Control Laboratory,Luoyang 471000,Henan,China;Luoyang Institute of ElectroOptical Equipment,Aviation Industry Corporation of China,Ltd.,Luoyang 471000,Henan,China)

机构地区：[1]光电控制技术重点实验室,河南洛阳471000 [2]中国航空工业集团有限公司洛阳电光设备研究所,河南洛阳471000

出　　处：《激光与光电子学进展》2023年第5期268-273,共6页Laser & Optoelectronics Progress

摘　　要：新一代红外对抗技术中,需要将红外高峰值功率激光耦合进红外传能光纤中进行传输。针对红外宽波段、高峰值功率激光进行光纤耦合时存在的问题,设计了一种光纤端帽参与聚焦的消色差耦合光学系统,能够对高峰值功率的2.1~4.6μm红外激光进行光纤耦合,并且光纤端帽可以提高光纤端面的损伤阈值。然后,对消色差耦合光学系统进行了详细设计,并选择了最佳三片式消色差玻璃组合ZNS/MGF2/IRG206进行设计,最终在耦合系统焦距为35 mm时,该系统对2.1~4.6μm波段的耦合效率达到92.74%。进一步分析可知,耦合光学系统最佳的焦距范围在35~47 mm,以及焦距在40 mm时,光纤对准最大容差为60μm。In the new generation of infrared countermeasure technology,it is necessary to couple the infrared high peak power laser into the infrared energy transmission fiber for transmission.Aiming at the problems existing in fiber coupling of infrared wideband and high peak power laser,this paper designs an achromatic coupling optical system in which the fiber end cap participates in focusing.It can couple 2.1‒4.6μm infrared lasers with high peak power,and the fiber end cap can improve the damage threshold of the fiber end face.Then,the achromatic coupling optical system is designed in detail,and the best three piece achromatic glass combination ZNS/MGF2/IRG206 is selected for design.Finally,when the focal length of the coupling system is 35 mm,the coupling efficiency for 2.1‒4.6μm band reaches 92.74%.Further analysis shows that the optimal focal length range of the coupling optical system is 35‒47 mm,and when the focal length is 40 mm,the maximum tolerance of optical fiber alignment is 60μm.

关 键 词：光学设计 耦合光学系统 光纤端帽 消色差 耦合效率 

分 类 号：O435[机械工程—光学工程]