中文摘要：

Yiping Wang was born in Chongqing, China in 1971. He received the B.S. degree in precision instrument engineering from Xi＇an Institute of Technology, Xi＇an, China in 1995 and the M.S. degree in precision instrument and mechanism and the Ph.D. degree in optics engineering from Chongqing University, Chongqing, China in 2000 and 2003, respectively. He joined the State Key Laboratory on Local Fiber-Optic Communication Networks and Advanced Optical Communication Systems, Shanghai Jiaotong University, Shanghai, China as a postdoctoral fellow in 2003. He then joined the Department of Electrical Engineering, Hong Kong Polytechnic University, Hong Kong, China, as a research fellow in 2005. He is currently a Humboldt fellow in Institute of Photonic Technology, Jena, Germany. His research interests focus on optical fiber gratings, optical fiber sensor, and microstructured fibers. Dr. Wang is a senior member of IEEE, a senior member of Chinese Optical Society and a member of the Optical Society of America. Hartmut Bartelt was born in Karlsruhe （Germany） in 1951. He graduated in physics from University of Erlangen-Nuremberg （Germany） in 1976 and received his Ph.D. for research on wavelength multiplexed optical signal processing in 1980. From 1981 to 1982 he worked as a research assistant at the University of Minnesota in Minneapolis （USA） in the field of volume holographic optical elements. In 1982 he returned to the University of Erlangen-Nuremberg to continue his research activities and in 1985 he joined the corporate research laboratories of Siemens AG in Erlangen （Germany）. In 1994 he was appointed professor for modem optics at the University of Jena （Germany） and became head of the optics division of the Institute for Physical High Technology （IPHT）, now division of optical fibers and fiber applications in the Institute of Photonic Technology. From 1999 to 2006 he also served as director （head of the executive committee） of the IPHT. Research activities cover the fields of optical specia