可拆卸式深紫外光纤真空馈通结构  

Detachable Deep Ultraviolet Fiber Optic Vacuum Feedthrough Structure

作　　者：郑一鸣 林文豫 吴俊 王旭迪[1] ZHENG Yiming;LIN Wenyu;WU Jun;WANG Xudi(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009

出　　处：《真空科学与技术学报》2024年第6期471-476,共6页Chinese Journal of Vacuum Science and Technology

基　　金：国家重点研发计划项目(2021YFC2202504)。

摘　　要：空间引力波探测中需要利用深紫外光的光电效应中和检验质量上积累的电荷,实现电荷管理。真空馈通是引入深紫外光纤的关键组件,须在实现电荷管理的同时确保惯性传感器真空度。文章提出了一种可拆卸的真空光纤馈通结构,通过金属套管的阶梯沉孔结构设计实现与深紫外裸光纤密封耦合,结合内螺钉压紧柔性材料获得金属套管与法兰的可拆卸密封。介绍了真空光纤馈通结构的设计与制作流程,通过氦质谱和光功率计测量了整体结构的泄漏率以及光传输损耗。实验结果表明,所设计的馈通组件的真空漏率小于1.0×10^(-12)Pa·m^(3)·s^(-1),传输深紫外光时的光功率损耗低于0.5 dB,能够满足地面和太空实验对电荷管理的需求,保障引力波探测正常进行。Charge management in space gravitational wave detection relies on utilizing the photoelectric effect of deep ultraviolet light to neutralize stray charges on the inertial sensor's surface.A pivotal component for this task is the vacuum feedthrough,facilitating the introduction of the deep ultraviolet fiber while maintaining the vacuum integrity of the inertial sensor.This paper proposes a detachable vacuum fiber feedthrough structure,featuring a stepped countersink design in the metal housing to securely couple with the bare deep ultraviolet fiber.The seal between the metal housing and the flange is achieved through internal screw compression of the flexible material.The design of the vacuum fiber feedthrough structure is detailed,and its performance is evaluated by measuring the overall structure leakage rate using helium mass spectrometry and the optical transmission loss with an optical power meter.Experimental results indicate a vacuum leakage rate of less than 1.0×10^(-12)Pa·m^(3)·s^(-1)for the designed feedthrough structure,with an optical power loss of less than 0.5 dB when transmitting deep-ultraviolet light.These findings demonstrate the suitability of the proposed structure for meeting the charge management requirements of both ground-based and space-based gravitational wave detection experiments,ensuring the normal operation of gravitational wave detection.

关 键 词：真空光纤馈通 高真空 深紫外光传输 电荷管理系统 

分 类 号：TH89[机械工程—仪器科学与技术]