1. Faculty of Electronic and Computer Engineering; Universiti Teknikal Malaysia Melaka; Hang Tuah Jaya 76100 Durian Tunggal Melaka Malaysia
2. Photonic Research Centre, University of Malaya; 50603 Kuala Lumpur Malaysia
3. Department of Electrical Engineering, Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia