An optical fiber surface plasmon resonance biosensor for wide range detection Kai Tong, Jia Guo, Meiyu Wang, Peng Dang, Fucheng Wang, Yungang Zhang and Meiting Wang Eur. Phys. J. Appl. Phys., 80 1 (2017) 11201 Published online: 13 October 2017 DOI: 10.1051/epjap/2017170254