Skip Navigation ANU Home | Search ANU | Directories

Mr Khu Tri Vu

Position: PhD Student Qualification: : Bsc (Physics and Materials Science, Monash University), Bsc with Honours (Physics, ANU), MPhil (Optoelectronics, Southampton University) Address: Laser Physics Centre, RSPhysSE, Australian National University, Canberra, ACT0200 Australia Office: Room J3-16A, John Carver Building, 58C Phone: +61 2 6125 4079 Fax: +61 2 6125 0029 Email: kvt111@rsphysse.anu.edu.au

Research Interests and Expertise:

• High power parametric oscillator and amplifier;
• High power pulsed fiber laser and amplifiers;
• Photonics fabrication;

Research Topic

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.

Research area link: Optical Device Fabrication

Supervisory panel: Dr. Steve Madden, Prof. Barry Luther-Davies and Dr Andrei Rode.

Facilities involved: magnetron sputtering, thermal and laser deposition, clean room facilities, thin film characterisation facilities, track coating, ICP etching, etc.

Others

I am also actively involved in the ANU OSA Student Chapter, Vietnamese Overseas Students in ACT.