水填充太赫兹空芯布拉格光纤温度特性研究  

Temperature characteristic of terahertz hollow core Bragg fiber filled with liquid water

作　　者：苏梦雅 徐伟[1,2] 石嘉[1,2] 郭翠娟 白华[1] 姚建铨[2] SU Mengya;XU Wei;SHI Jia;GUO Cuijuan;BAI Hua;YAO Jianquan(Tianjin Key Laboratory of Optoelectronic Detection Technology and System,School of Electrical and Electronic Engineering,Tiangong University,Tianjin 300387,China;Key laboratory of Opto-Electronics Information Technology(Ministry of Education),School of Precision Instruments and Opto-Electronic Engineering,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津工业大学电气与电子工程学院天津市光电检测与系统重点实验室,天津300387 [2]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室,天津300072

出　　处：《光电子．激光》2022年第4期337-341,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金(61905177);陆军军医大学电磁辐射医学防护教育部重点实验室开放基金(2018DCKF002);天津市企业科技特派员项目(20YDTPJC01090)资助项目。

摘　　要：空芯太赫兹(Terahertz, THz)光纤因其损耗低和易集成功能材料等优点是当前研究热点。液态水在太赫兹频段具有的独特性质使其在太赫兹辐射、传感和器件等方面具有多种潜在应用。本文设计一种带有水缺陷层的太赫兹空芯布拉格光纤(hollow core Bragg fiber, HCBF),并采用有限元法分析了其温度特性。结果表明,设计的太赫兹光纤在0.34 THz到0.44 THz频段内存在明显的温度可调的吸收峰,且限制损耗随着水温的升高而增加。同时,光纤具有较高的核芯功率比,其值均大于98.6%。本文所研究的水填充太赫兹光纤在研究太赫兹与液体相互作用、太赫兹调控器件等领域具有潜在的应用价值。Hollow core terahertz(THz) fibers have attracted attention due to the low loss and easy modification with functional materials.Liquid water has unique properties in the THz region and has been widely investigated in THz emission, sensing and devices.In this paper, a THz hollow core Bragg fiber(HCBF) with a water defect layer is proposed.The finite element method is used to analyze the temperature characteristic of the water-filled THz fiber.The numerical analysis results show that the peak of the confinement loss can be controlled by adjusting the temperature of the liquid water, and the confinement loss increases with the increasing temperature of the liquid water in the frequency range of 0.34 THz to 0.44 THz.Moreover, the THz fiber has a high core power fraction up to 98.6%.The proposed THz water-filled fiber may have great potential as a sample cell for THz interaction with liquid and THz controllable devices.

关 键 词：太赫兹(Terahertz THz) 空芯布拉格光纤(hollow core Bragg fiber HCBF) 调控器件 液态水 温度 

分 类 号：TN252[电子电信—物理电子学]