Lecture from Prof.Wei Jin from The Hong Kong Polytechnic University

date：2015-07-09 pageviews：68

Title: MICRO/NANOSTRUCTURED OPTICAL FIBER DEVICES AND SENSORS

Speaker：Prof.Wei Jin from The Hong Kong Polytechnic University
Time：2:30 pm,On December 13,2011.
Place：Room 302, Institute of Optical Communication Materials.
Sponsor：School of Materials Science and Engineering

Abstract：
Micro/nanostructured optical fibers have unusual properties and allow for the creation of novel photonic devices and sensors. I will report some of our recent work carried out in this area, including photonic crystal fiber polarizers and polarization controllers; gyros and hydrophones; strain, temperature, and gas sensors; and fiber grating devices and sensors. I will also introduce our work on post-processing of microstructured fibers with a femtosecond IR laser, a CO2 laser, and fiber taper facilities. With these facilities, we were able to selectively open/close air-columns to the external environment, allowing filling of gas, liquid, polymer, etc. into selected air-holes and hence novel gas and liquid sensors and photonic devices. I will also talk about our recent experiments on nano-fiber long period grating refractive index sensors and evanescent wave gas sensors based on photo-acoustic spectroscopy.

Brief introduction to Prof.Wei Jin:

Wei Jin received a BEng degree from Beijing University of Aeronautics and Astronautics in 1984, and a Ph.D degree from University of Strathclyde in 1991. Afterwards was employed as a Postdoctoral Research Fellow at University of Strathclyde till the end of 1995. He joined the Department of Electrical Engineering of the Hong Kong Polytechnic University as an assistant Professor in 1996 and was promoted to an associate professor in 1998 and a professor in 2003. His research interests are photonic crystal fibers and devices, optical fiber sensors, fiber lasers and amplifiers, optical gas detectors, condition monitoring of electrical power transformers, and civil and mechanical structures. He edited 2 books, published over 400 technical papers and holds 10 patents in the area of fiber optic devices and sensors.