29
Aug

SEGi partners University Malaya in leading engineering research

29/08/2020

SEGi College Subang Jaya is proud to announce that Dr Tiu Zian Cheak, Head, Faculty of Engineering co-published a leading research in Photonics Engineering in the Journal of Moden Optics (ISI indexed) with researchers from University Malaya, University Sains Malaysia, University Islam Antarabangsa Malaysia and Airlangga University, Indonesia.

This joint research is a materialization of the recent Memorandum of Understanding signed between SEGi University & Colleges and University Malaya to partner (amongst other terms) in research, innovation and development programmes.

In this research, a temporal and amplitude modulator based on few-layers bismuth telluride (Bi2Te3) flakes is demonstrated for C-band operation. The few-layers thick Bi2Te3 flakes are prepared by mechanically exfoliating a Bi2Te3 crystal. As an optical pulse modulator, the Bi2Te3-based saturable absorber (SA) provides stable Q-switching operation at 1561.1nm with a maximum repetition rate of 70.92 kHz and minimum pulse width of 2.38 µs. As an optical amplitude modulator, two linear regions at different pump power ranges are obtained in the regression line of the peak intensity. The first linear region covers a pump power range from 0.0 to 80.32mW and corresponds to a modulation efficiency of 0.05 dB/mW, while the second linear region covers a pump power range of 80.32–98.64mW with a modulation efficiency of 0.81 dB/mW.

Find out more about SEGi College Subang Jaya’s engineering programmes here!

 

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