He气辅助熔接的全光纤型HC-PCF低压气体腔的制备  

Preparation of All-Fiber HC-PCF Low-Pressure Gas Cell by the He-Assisted Fusion Splicing Technique

作　　者：郝军 刘晔 李文彩 陈迪俊[2] 冯素娟 蔡海文[2] 毛庆和 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽光子器件与材料重点实验室,安徽合肥230031 [2]中国科学院上海光学精密机械研究所,空间激光信息传输与探测技术重点实验室,上海201800

出　　处：《光学学报》2015年第9期60-65,共6页Acta Optica Sinica

基　　金：国家自然科学基金(61377044,61275186,11104282);国家973计划(2013CB934304)

摘　　要：提出了一种He气辅助熔接的全光纤型空芯光子晶体光纤(HC-PCF)低压气体腔的制备方法。通过用高压待充气体冲洗HC-PCF,确保了腔内的气体纯度;通过利用光谱监测系统监测HC-PCF降压过程及He气辅助熔接过程中CO2吸收光谱的变化,研究了HC-PCF中气体动力学运动过程;通过利用He气辅助熔接方法,制备得到压强为7 k Pa、插入损耗小于2 d B、长度为10 m的全光纤型HC-PCF低压CO2气体腔。该方法也适用于更低压强的HC-PCF气体腔的研制,且制备的气体腔具有良好的气密性和长期稳定性。A method of He-assisted fusion splicing is demonstrated to prepare the all-fiber hollow-core photonic crystal fiber （HC-PCF） low-pressure gas cell. In the preparing process, the high gas purity is guaranteed by flushing the HC-PCF with the high-pressure desired gas; the dynamical gas flow in the HC-PCF is studied with a self-made real-time spectral detection system; and a 10 m all-fiber HC-PCF low-pressure CO2 gas cell with the pressure of 70 kPa and insertion loss less than 2 dB is successfully prepared by He-assisted fusion splicing technique. This method may also be suitable for the fabrication of HC-PCF gas cell with lower pressure, and the prepared gas cell shows good air-tightness and long-term stability.

关 键 词：光纤光学 全光纤型低压气体腔 He辅助熔接 吸收光谱 

分 类 号：TN253[电子电信—物理电子学]