高性能抗辐照铒镱共掺光纤  

High-Quality Radiation-Resistant Er-Yb Co-Doped Fiber

作　　者：曹驰 陈阳 李文臻 褚应波 邢颍滨 廖雷 戴能利[1] 李进延[1] Cao Chi;Chen Yang;Li Wenzhen;Chu Yingbo;Xing Yingbin;Liao Lei;Dai Nengli;Li Jinyan(Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 43oo74,Hubei,China;Wuhan Changjin Laser Technology Co.,Ltd.,Wuhan 430206,Hubei,China)

机构地区：[1]华中科技大学武汉国家光电研究中心,湖北武汉430074 [2]武汉长进激光技术有限公司,湖北武汉430206

出　　处：《中国激光》2022年第22期239-243,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金(11875139)。

摘　　要：为了提升铒镱共掺光纤的抗辐照性能,以适用于远距离太空通信应用,采用改进的化学气相沉积(MCVD)方法制备了抗辐照铒镱共掺光纤。在常温下使用Co60辐射源对自研铒镱共掺光纤进行剂量为300 Gy和1000 Gy、平均剂量率为0.2 Gy/s的辐照。在940 nm和1550 nm处,该光纤在300 Gy辐照剂量下的辐致吸收(RIA)分别为0.10 dB/m和0.19 dB/m,在1000 Gy辐照剂量下的RIA分别为0.46 dB/m和0.37 dB/m。搭建了铒镱共掺光纤放大器(EYDFA)进行增益测试,采用输入功率为40 mW的1550 nm信号与940 nm的泵浦源,泵浦功率为7.3 W时其辐致增益变化(RIGV)分别为0.2 dB(300 Gy)和0.7 dB(1000 Gy)。Objective Nowadays, rare-earth ion-doped fiber lasers and amplifiers are widely used in optical communication, industrial processing, military, and medical applications. Among them, the Er-Yb co-doped fiber amplifiers(EYDFA) with high power, low noise, and small size have a great potential for long-range space communication applications. However, rare-earth-doped fibers produce many color centers when exposed to various types of cosmic radiation such as X-rays, γ-rays, etc. Some of the color centers generated during irradiation originate from co-dopant elements like aluminum and phosphorus in rare-earth-doped fibers, whereas others originate from precursors formed during fiber fabrication. The absorption bands of these color centers are mainly located in the UV and NIR bands, which can cause radiation-induced absorption(RIA) in the pump and signal bands of the Er-Yb-doped fiber(EYDF), resulting in a severe degradation of the performance of the fiber amplifier. Therefore, it is crucial to improve the radiation resistance of the EYDF.Methods A radiation-resistant Er-Yb co-doped fiber(RREYDF) was prepared via modified chemical vapor deposition(MCVD), and the concentration and ratio of doping components such as erbium, ytterbium, phosphorus, and cerium were adjusted to enhance the radiation tolerance of the fibers. The Er, Yb, and P doping ratio was 1∶22∶536, and the core and cladding dimensions were 10.5 μm and 130 μm, respectively. The irradiation doses for current space missions range from 300 Gy to 1000 Gy, so those values are chosen to test the RIA and radiation-induced gain variation(RIGV) of RREYDF. The RIA and RIGV were tested using Photon Kinetics 2500 and a typical EYDFA, respectively.Results and Discussions Radiation-induced absorption(RIA) was 0.10 d B/m and 0.19 d B/m(300 Gy) at 940 nm, and 0.46 d B/m and 0.37 d B/m(1000 Gy) at 1550 nm. For gain testing, an Er-Yb co-doped fiber amplifier(EYDFA) was built, and the radiation-induced gain variation(RIGV) was 0.2 d B(300 Gy) at 1550 nm and 0.7 d B(100

关 键 词：光纤光学 铒镱共掺光纤设计与制备 抗辐照性能 光纤通信 铒镱共掺光纤放大器 

分 类 号：O436[机械工程—光学工程]