Aralık 7, 2017 - 3:00 pm
Aralık 7, 2017 - 5:00 pm
AddressENG 208 View map
GRADUATE SCHOOL OF
SCIENCES AND ENGINEERING SEMINAR
Speaker: Prof. Ryszard Buczynski
Date: 7th December, 2017
Time: 3.00 P.M.
Place: ENG 208
Optical fibre technology revisited: toward nanostructured microoptics and optofluidic systems
1 Institute of Electronic Materials Technology, Wolczynska 133, 01-919 Warsaw, Poland
2 University of Warsaw, Faculty of Physics, Pasteura 7, 02-093 Warsaw, Poland
Optical fibre technology is found to be established domain with well know application area. However it still offers new opportunities for microoptics and optofluidics.
Nanostructured gradient index (nGRIN) elements are a new class of planar-surface micro-optical elements. An effective gradient index profile with any arbitrary refractive index distribution can be developed with internal discrete nanostructure composed of two types of glasses using standard fiber drawing technology. The effective medium Maxwell-Garnett theory is applied to describe performance of the components. A low-cost modified stack-and-draw technology commonly used for photonic crystal fibres development is used for development of nGRIN components. This technology can be used to develop nanostructured core fibres and a wide range of nanostructured gradient index micro-optical components as microlenses, axicons, diffractive optical elements and polarization-sensitive components
Photonic crystal fibres offers unique opportunities for dispersion engineering. A combination of these properties with various liquids brings new opportunities for nonlinear optics and optical sensing. A photonic crystal fibre with hollow core filled with highly nonlinear liquids are considered as a new system for coherent supercontinuum generation. On the other hand optical fibres with open core access can be used to build interferometric sensors for measurement of small refractive index changes as a function of temperature or mixture concentration.
Fig. 1. An array of flat-surface nGRIN microlenses with discrete internal nanostructure
CV Ryszard Buczynski
Ryszard Buczynski received his M.Sc. and Ph.D in Physics from the Warsaw University of Technology, Poland in 1994, 1999 and Ph.D. in Applied Science from the Vrije Universiteit Brussel, Belgium in 2000, respectively. During his academic career R. Buczynski held postdoc positions at Vrije Universiteit Brussel, Belgium (2000-2001) and Heriot-Watt University, UK (2007-2009). Currently he is a Professor and Head of Department of Glass at the Institute of Electronic Materials Technology in Warsaw and Associate Professor at Faculty of Physics, University of Warsaw, Poland. His research interest includes photonic crystal fibers, supercontinuum generation, microoptics, microfluidics. Recently his research focus on development of nonlinear photonic crystal fibers based on soft glasses, and nanostructured microoptical components and fibers integrated with metal wires. Prof. Buczynski is an co-author of more than 200 publications including over 90 full papers in peer reviewed journals.