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Title:Theoretical and Numerical Analyses on Fabrications of Microstructured Optical Fibres and Tapers
 
Speaker: Shicheng Xue – Optical Fibre Technology Centre (OFTC), the University of Sydney, National Innovation Centre, Australian Technology Park, Sydney, Australia
 
时间:9月15日星期五下午2:00
地点:力学系四楼大教室
要求大固体研究生必须参加
 
ABSTRACT
 
Optical fibres are a multi-billion dollar industry, having played a key part in the information technology revolution.
 
Most optical fibres guide light using total internal reflection. This requires the use two materials with different refractive indices in the core and cladding. Microstructured optical fibres (MOFs) were developed in 1996 and use a different approach. They are made from a single material and use a pattern of tiny air holes to achieve their optical effects. Changes in the microstructure can produce widely tunable effects. The fibres can have remarkable properties, including being able to have single mode guidance without a cut-off wavelength, being able to tailor the dispersion and polarisation properties, and most impressively, to allow guidance of light in air or solutions. MOFs were initially made in silica and for the first time, MOFs made in polymer were invented at the OFTC in 2001, which making it possible to produce structures that cannot easily be made in silica and allowing a large variety of fibre structures (such as single mode, graded index and multi-core) to be made using a single fabrication technique.
 
MOFs represent a next-generation, radically improved version of a well-established and highly successful technology. They have become the focus of intense world-wide research and development activities because of their potential applications. Although MOFs have been on the road for commercialization, the fabrication technology of MOFs is still based on the trail-and-error method.
  
The presenter has been developing and applying fluid dynamics to model and analyze the fabrication process of MOFs for three years. The models enhance understanding of the detailed mechanism of structure deformation inside the fibres during the fabrication process and enable better designs to be constructed and the operating conditions to be optimized.
 
In this talk, a brief introduction to the applications MOFs and the state-of-the-art in their fabrication technology will be given. The mathematics and numerical modelling of the transport phenomena in the fabrication process will be presented, together with the results of simulations and experimental confirmations of the models. The work has been a typical example demonstrating how an industrial process can be effectively predicted through theoretical and numerical analyses.
 
 
A Brief CV of Dr. Shi-Cheng Xue
 
Dr. Shicheng Xue is a Senior Research Scientist in the Optical Fibre Technology Centre (OFTC) at the University of Sydney of Australia.  He joined the OFTC in late 2003 as a leading scientist in charge of analyzing and optimizing fabrication process of newly invented (in 2000) microstructured polymer optical fibres (mPOFs). His group has won Australia Eureka prize in 2005 -- Australia’s most prestigious science prize.
 
Before joining the OFTC, he was working as a senor research fellow in the Rheology group of the School of Aerospace, Mechanical & Mechatronic Engineering, the University of Sydney, where he received his Ph. D degree in 1997.  He received his bachelor’s degree in 1982 and Master degree in 1986 from South China University of Technology. Following graduation, he moved to Shanghai and began his 7-year career as an engineer and project manager in developing the equipments and materials used for modern packaging industry, and late as the head of the R&D division in the institute.
 
Some of the areas he has worked in include: developing novel numerical methods for investigating the transport phenomena in three-dimensional flow processes involving complex viscoelastic fluids (computational rheology), developing simulation and design tools for polymer processing, modelling viscoelastic materials.
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