[1] Univ Putra Malaysia, Fac Sci, Dept Phys, Serdang 43400, Selangor, Malaysia
[2] Univ Malaya, Photon Res Ctr, Kuala Lumpur 50603, Malaysia
[3] Univ Putra Malaysia, Inst Adv Technol, Serdang 43400, Selangor, Malaysia
[4] Univ Tun Hussein Onn Malaysia, Fac Appl Sci & Technol, Dept Phys & Chem, Opt Fiber Laser Technol OpFLAT Focus Grp, Pagoh 84600, Johor, Malaysia
[5] Univ Teknol Malaysia, Malaysia Japan Int Inst Technol, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia