方位传递系统中透镜参数对偏振传输的影响分析  

Influence of Lens Parameters on Polarization Transmission in Azimuth Transmission Systems

作　　者：杨志勇 李顺 罗李娜 蔡伟 张志伟 Yang Zhiyong;Li Shun;Luo Lina;Cai Wei;Zhang Zhiwei(Armament Launch Theory and Technology Key Discipline Laboratory of PRC,Rocket Force Engineering University,Xi'an 710025,Shaanxi,China)

机构地区：[1]火箭军工程大学兵器发射理论与技术国家重点学科实验室,陕西西安710025

出　　处：《光学学报》2023年第20期74-83,共10页Acta Optica Sinica

基　　金：国家自然科学基金(61505254)。

摘　　要：在基于保偏光纤的非通视方位传递系统中,针对经保偏光纤传输后出射光束直径太小的问题,可以引入扩束系统进行解决。透镜对偏振传输影响的研究是引入扩束系统的关键,但相关研究主要集中在对入射光不同偏振态单一因素的讨论。因此,以伽利略扩束系统为例,详细分析了透镜中偏振传输的过程,推导了含透镜参数的偏转角公式,仿真了透镜参数对偏转角的影响,最后验证了理论与实验结果的一致性。结果表明:透镜参数对偏振传输的影响使偏振方位角发生偏转,其中曲率半径与偏转角成反比关系;中心厚度与偏转角成线性关系;折射率和光斑半径与偏转角均成平方关系。该研究结果对在基于保偏光纤的非通视方位传递系统中引入扩束系统具有一定的指导意义。Objective In the case of a non-line-of-sight azimuth transmission system based on polarization-maintaining fiber,aligning the output light passing through the fiber with the photoelectric conversion receiver is necessary to increase the extremely small diameter of the outgoing light after transmission through the fiber.A beam-expanding system can be introduced to solve this problem,and the azimuth transmission can be achieved in a non-line-of-sight condition.Because the classical refractive beam spreading system is composed of lenses,the influence of lenses in polarization transmission determines the accuracy of the azimuth transmission.However,general studies of the lens focused on the influence of polarization states of incident light and lacked analyses regarding lens parameters and beam-expanding systems comprising lens groups.In the non-line-of-sight azimuth transmission system,the influence of lenses on polarization transmission is key to introducing the beam-expanding system.This system has broad application prospects in many fields,including spacecraft docking in space stations,tunneling engineering,and high-precision instrument measurement.Methods In this study,the analysis related to lenses is based on the Jones matrix principle and the Fresnel equation.First,the Jones vector is used to characterize the incident polarized light.Second,the incident light gets refracted after passing through the lens and the Jones vector relationship between the incident and refracted light is calculated using the Jones matrix with respect to the lens.Subsequently,the Jones matrix with respect to the lens can be characterized using the amplitude transmission ratio,which is the ratio between the angle of incidence and angle of refraction.These angles are derived based on the Fresnel equation.Finally,the geometric relationship between the light and lens is analyzed using the ray-tracing method to determine the angle of incidence and refraction.Using the Galileo beam expanding system as an example,the process of polarization

关 键 词：线偏振光 透镜 扩束系统 方位传递 偏转角 

分 类 号：O436.3[机械工程—光学工程]