1. Photonics Engineering Laboratory, Department of Electrical Engineering, University of Malaya, Kuala Lumpur, Malaysia
2. Faculty of Information Technology, INTI International University, Nilai, Malaysia
3. Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia Melaka, Durian Tunggal, Malaysia
4. Department of Physics, Faculty of Science and Technology, Airlangga University, Surabaya, Indonesia