Dr Khu Vu

Dr Khu Vu
Visiting Fellow
Laser Physics Centre
Quantum Science & Technology


K.T.Vu received the B.Sc. degree from Monash University, Melbourne, Australia, in 2002 and the B.Sc. degree (hons) from The Australian National University, Canberra, Australia, in 2003. He moved to Southampton to study at the Optoelectronics Research Centre (ORC), the University of Southampton, U.K. He graduated with M.Phil degree in 2006. He worked on development of high-power pulse fiber laser amplifiers for the thesis. He has recently received the Ph.D. qualification at the Laser Physics Centre, The Australian National University, working on Tellurite waveguide fabrication. He is now working as a research fellow on integration of nonlinear materials for photonics.

Research interests

Characterise and optimise the materials; the deposition technology; the waveguide fabrication approach; and performance of planar Tellurite waveguides

Tellurite glasses are broad class of multi-components oxide glasses containing predominantly Tellurium Oxide (TeO2). Tellurite glasses are promising for a wide range of applications of generating mid-infrared light for sensing, spectroscopy, telecommunications. Important optical properties of Tellurite include: being a very good hosts for rare earth ions (Erbium, Thulium etc which can be used for laser amplifier), having high Raman gain coefficient (30-60 times higher than silica) and Raman shift at about double that of silica. Furthermore, Tellurite glasses can be poled to achieve second order nonlinearities with coefficient comparable with those of crystalline materials. This property can be used for electro-optic devices or frequency conversion via parametric mixing. Tellurite glasses have also been recognised for its third order nonlinearity as having the largest coefficient between oxide based glasses. Because they have band edge at very short wavelength, 300-400nm, they also can handle very high optical intensity without the multi-photon absorption and photo darkening that affect most of current materials currently used for thin film optical applications.

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