报告时间：2020年11月13日（周五）18:00-20:00
报告地点：腾讯会议，会议ID：45915113811
报告题目：Ionizing Radiation Effect of Rare Earth or Bismuth Doped/Co-doped Optical Fibres(稀土或铋掺杂/共掺光纤的离子辐射效应)
报告简介：Targeting to the harsh radiation environment applications, i.e. inter-satellite communication, LiDARs, nuclear plant, etc., ionizing radiation effects of erbium, ytterbium or bismuth doped/co-doped optical fibres have been investigated. Firstly, the radiation-induced photodarkening in erbium/ytterbium co-doped optical fibre (EYDF) and the thermal effect in these irradiated EYDFs have been studied, which evidently displays reversible thermal effect. Then, the radiation induced activation of bismuth active centre (BAC) from inactive bismuth has been assessed through the analysis of the absorption, emission and lifetime of bismuth doped optical fibre (BDF) and bismuth/erbium co-doped optical fibre (BEDF). The influence factors, such as Yb co-doping and radiation type, upon the radiation effect have also been inspected. In addition, thermal treatment has been implemented to improve the performance of BEDF after gamma/electron irradiation. To improve the radiation resistance of the fibres, it has been attempted to investigate radiation hardening by combining thermal treatment and hydrogen loading. Finally, the demonstration of the radiation-independent temperature sensor based on fluorescence intensity ratio (FIR) of EYDF has been carried out, indicating great potential for the sensing field in radiation environment.
针对苛刻的辐射环境应用，即卫星间通信、雷达、核电站等，已研究了掺铒/掺镱/掺铋光纤的电离辐射效应。首先，研究掺镱共掺杂光纤（EYDF）中辐射诱导的光暗化以及这些辐照的EYDF中的热效应，其中显然表现出可逆的热效应。然后，通过分析铋掺杂光纤（BDF）和铋/铒共掺杂光纤（BEDF）的吸收、发射和寿命，评估了辐射从非活性铋引起的铋活性中心（BAC）的活化。还检查了诸如镱共掺杂和辐射类型等对辐射效果的影响因素。另外，已经进行了热处理以改善γ/电子辐照后BEDF的性能。为了提高纤维的抗辐射性，已经尝试通过结合热处理和氢负载来研究辐射硬化。最后，基于EYDF的荧光强度比（FIR）进行了与辐射无关的温度传感器的演示，为辐射环境中的传感领域提供了巨大的潜力。
报告人简介：LUO YANHUA, PhD, Deputy director of Photonic & Optical Communications, University of New South Wales (UNSW), Australia. Dr Luo received his B.E and PhD degrees from University of Science and Technology of China (UTSC) in 2004 and 2009, respectively. His research interest is functional photonics materials, fibers and devices, including specialty optical fiber, optical fiber communication and sensing research work, etc. He presides over the experimental teaching on ‘Photonics Network’, ‘Optical Fiber and Optical Circuit’, etc. He has made many contributions in doped optical fibre, polymer optical fiber grating, Bi/Er co-doped optical fibre and its ultrabroad emission: i.e. developing 3 modes EDFA applied for the mode multiplexing transmission by NEC America Lab; introducing 3D printing technique for the fibre fabrication; develop D shaped fibre gratings applied for SHM of the world largest wind turbine by Vestas; proposing and developing bismuth erbium codoped fibre with ultrabroad band emission; etc. He has participated/hosted 19 projects, including: 2 ARC, 4 NSFC, 1 AFOSR, 1 ECR/FRG, 9 Open Funds, etc, with a total funding of ~1.5 million AUD. So far, he has held 2 China patents and co-authored >200 refereed journal / conference papers and 9 book chapters on these subjects. His papers have been cited >1600 times by ISI Web of Science, with an H-index 21.
LUO YANHUA，博士，研究员，澳大利亚新南威尔士大学（UNSW）光子通信实验中心实验室主管，于2004年和2009年在中国科学技术大学获得学士和博士学位，博士期间曾两次受国家资助，到UNSW光子通信实验中心开展光敏聚合物光纤的研究。主要从事光子学材料及其应用的研究，特别是特种光纤、光纤通信和传感方面的研究工作，并主持《光子学网络》、《光纤及光路》等教学实验。在掺杂光纤、聚合物光纤光栅、铋铒光纤及超宽带光发射等方面取得了一系列国际领先的研究成果，如在国际上首次报道3D打印的聚合物光纤预制棒及光纤；研制的三个模掺铒放大光纤创新性应用于美国NEC公司的模分复用传输系统；将D-型光纤光栅成功应用于世界最大的风力发电Vestas公司等。先后参与/主持澳大利亚国家研究基金（2项），国家自然科学基金项目（4项）、亚洲航空航天研发项目（1项）、国家/省级重点实验室开放课题项目（9项）、UNSW校级青年基金（1项）等19个项目的研究，项目经费高达150万澳币。迄今已在国内外著名期刊及会议发表论文〉200篇，授权专利2项，受邀撰写学术专著6章节，h因子为21，总共被引用1600多次。
本报告由燕山大学引才引智国际合作培育项目资助。
校内联系人：信息科学与工程学院付兴虎，18833822248
科学技术研究院
2020年11月9日
