• 光纤传感及其应用研究

    题目:光纤传感及其应用研究

    时间:2021-07-23

    地点:电院群楼5号楼214

    Optical fiber-based devices have been widely deployed in recent years. There are many advantages of using fiber as a sensor. These include electrically-passive operation, light weight, immunity to radio frequency interference and electromagnetic interference, high sensitivity, compact size, corrosion resistance, easily multiplexing and potentially low cost. Several novel fiber-based sensors and technologies developed are presented here, including fiber Bragg grating (FBG) based sensors, photonic crystal fiber (PCF) based sensors, specialty fiber-based sensors and distributed fiber sensing systems. FBGs as instinctive sensors, are ingeniously de- signed as two-dimensional (2D)tilt sensors, displacement sensors, accelerometers and corrosion sensors here; PCF based evanescent field absorption sensor, PCF induced Mach-Zehnder interferometer and Fabry-Perot refractometer for temperature and refractive index sensing are presented; based on localized surface Plasmon resonant(LSPR) effect, nano-sized fiber tip with gold nanoparticles are demonstrated for live cell index bio-sensing applications.详情>>

  • 低损空芯光纤的若干应用

    题目:低损空芯光纤的若干应用

    时间:2021-05-27

    地点:电院群楼5号楼508会议室

    微结构空芯光纤研究,近年来在理论与制备工艺研究中取得了重要突破,其最低传输损耗已经成功降至1 dB/km以下,接近传统石英单模光纤瑞利散射损耗极限。与传统折射率导引型光纤相比,低损空芯光纤具有更低的材料吸收损耗、光纤色散、光学非线性、热延迟系数和更高的激光损伤阈值功率,在大容量光通信、大功率激光能量传输、非线性光学和新体制光纤传感领域将发挥独特的作用。详情>>

  • 流光方寸,御息物联:面向未来的先进光信源

    题目:流光方寸,御息物联:面向未来的先进光信源

    时间:2021-05-12

    地点:电院群楼5号楼214

    先进光信息器件,正在作为核心节点驱动光物联网的发展。面向未来的高性能、新功能型光器件的研发对我们提出了越来越高的要求,涉及到越来越多的新原理探索、新结构设计、新材料结合和新应用开发。本汇报将分享姚教授团队近期在光频梳、光调控和光感知中的研究进展,并探讨器件结合系统,前沿结合应用的新尝试和新努力。详情>>

  • 全光谱发光和探测技术

    题目:全光谱发光和探测技术

    时间:2021-03-26

    地点:电院1号楼418会议室

    带隙是决定半导体材料应用价值的主要特性参数之一,然而自然界中能获得的半导体材料带隙有限,只能在几个分立的波段内发光和探测,制约半导体光电子技术的发展。通过在材料生长过程中对组分进行连续调控可以获得带隙渐变半导体材料,这种材料在三维形貌的维度上增加了光谱维度,具有全光谱可调的光电特性,拓展了半导体材料在光电子器件上的应用。

    报告人将详细介绍带隙渐变半导体材料的生长,器件加工方法以及光电子应用;重点介绍基于带隙渐变纳米材料开发的世界上最小的光谱仪和调谐范围最宽的激光器。详情>>