量子密钥分发系统中高面形相位调控反射元件的研制  

Development of Highly Surface Phase-modulated Reflection Elements for Quantum Key Distribution Systems

作　　者：潘永刚[1,2] 王由德 付秀华[1,2] 林兆文 杜昕 谢海峰 石澎[4] PAN Yonggang;WANG Youde;FU Xiuhua;LIN Zhaowen;DU Xin;XIEHaifeng;SHI Peng(College of Optoelectronic Engineering,Changchun University of Science and Technology,Changchun 130022,China;Zhongshan Research Institute,Changchun University of Science and Technology,Zhongshan 528436,China;Zhongshan Jilian Optoelectronic Technology Co.,Ltd.,Zhongshan 528436,China;Zhongshan Torch Vocational and Technical College,Zhongshan 528436,China)

机构地区：[1]长春理工大学光电工程学院,长春130022 [2]长春理工大学中山研究院,中山528436 [3]中山吉联光电科技有限公司,中山528436 [4]中山火炬职业技术学院,中山528436

出　　处：《光子学报》2025年第3期253-263,共11页Acta Photonica Sinica

基　　金：国家自然科学基金(No.62127813);中山市引进创新团队项目(No.CXTD2023008);中山市社会公益科技研究项目(No.2022B2005)。

摘　　要：根据量子密钥分发系统使用要求,采用Ta_(2)O_(5)和SiO_(2)两种材料研制了高面形相位调控反射元件。基于等效层原理结合Essential Macleod软件优化获得膜层厚度敏感度较低的相位调控反射膜系。采用电子束离子辅助沉积方法,通过应力补偿校正了反射元件的面形。测试结果表明,该反射元件在45°入射时,632.8 nm±5 nm波段反射率为87.92%;1540 nm波段p光反射率为99.73%、s光反射率为99.80%、相位差为0.16°;1563 nm波段p光反射率为99.74%、s光反射率为99.78%、相位差为0.88°,反射面形均方根值(Root Mean Square,RMS)为0.00494λ(λ=632.8 nm),并通过了水溶性、附着力、温度冲击、湿热等试验,满足量子密钥分发系统的使用要求。Quantum communication is to construct protocols and algorithms using the Heisenberg Uncertainty principle of quantum mechanics,the No-Cloning theorem of quantum states and quantum entanglement properties to realize confidential communication in the real sense.Quantum communication is mainly divided into two kinds of quantum invisible transmission and quantum key distribution,of which the quantum key distribution technology is the most mature development,has been verified by researchers in various countries,and realized engineering applications.Restricted by the curvature of the earth and the loss of optical fiber,the ground-based quantum communication method can not achieve a wide range of quantum communication network coverage,so people will focus on the satellite platform,through the establishment of a highly stable and low-loss quantum channel between the satellite platform and the optical ground station,it can realize the ultra-long-distance quantum key distribution.The reflection element is an important part of the quantum key distribution system,which has the roles of efficiently transmitting optical energy and folding the optical path.When light is incident obliquely to the reflection element,the effective refractive index of the membrane layer for the p-polarized component and the s-polarized component is different,which generates the polarization effect and phase difference,leading to an increase in the quantum bit error rate;and when the light passes through the reflection element with the surface shape error,the different optical ranges experienced by the reflection on the surface lead to the distortion of the phase such as the wavefront,which influences the quality of coherent mixing and the efficiency of the communication coupling.Therefore,in order to improve the communication quality and reduce the bit error rate,the reflection element is particularly important to reduce the phase difference and surface shape error under the premise of ensuring higher reflectivity.In this paper,a low-sensitivity fi

关 键 词：薄膜 反射元件 相位差 面形调控 量子密钥分发 

分 类 号：O484[理学—固体物理]