Dopant concentration and thermoluminescence (TL) properties of tailor-made Ge-doped SiO2 fibres by Zahaimi, Nurul Arina, Abdullah, Mohd Haris Ridzuan Ooi, Zin, Hafiz, Abdul Rahman, Ahmad Lutfi, Hashim, Suhairul, Saripan, Mohd Iqbal, Paul, Mukul Chandra, Bradley, D. A., Abdul Rahman, Ahmad Taufek