题目：Microwave photonics for ultra-high speed fiber-optic sensing

报告人：Prof. Jianping Yao(姚建平)

主持人：关柏鸥

时间：2016年3月9号上午9:30

地点：曾宪梓科学馆405会议室

报告简要：

Conventional fiber Bragg grating (FBG) sensors have a few limitations, such as limited interrogation resolution and speed, and difficulty in separating different measurands. In this talk, microwave photonics techniques are employed to interrogate an FBG sensor with improved interrogation resolution and speed. Three approaches will be discussed: 1) a linearly chirped fiber Bragg grating sensor based on frequency-to-time mapping and pulse compression, which is able to achieve simultaneous measurements of a strain and temperature at MHz speed; 2) a strain sensor based on a tunable optoelectronic oscillator employing a single-mode phase-shifted fiber Bragg grating. Ultra-fast interrogation is achieved by directly measuring the oscillation frequency with a high resolution of 3.60fm; 3) a temperature-insensitive transverse load sensor based on a dual-frequency optoelectronic oscillator employing a polarization-maintaining phase-shifted fiber Bragg grating. Fast interrogation is achieved by measuring the difference of the two oscillation frequencies.

报告人简介：

Jianping Yao is a Professor and University Research Chair in the School of Electrical Engineering and Computer Science, University of Ottawa, Canada. He has been working actively in Microwave Photonics. Prof. Yao has published over 500 papers including over 300 journal papers and 200 conference papers with an H-index of 53. He is a topical editor for Optics Letters, and serves on the Editorial Boards of Optics Communications, and Science Bulletin. Prof. Yao is a Fellow of IEEE, a Fellow of the Optical Society of America, and a Fellow of the Canadian Academy of Engineering.

欢迎广大师生踊跃参加！

光子技术研究院

2016年3月3日