I. Yulianti, S.S. Edy, B.A. Saputra, M.P. Aji, Susanto, O. Kurdi
Evanescent wave based-optical fiber sensor to detect cadmium ion is proposed. Chitosan was used by using the dip-coating method. The sensor was fabricated in U-bent shape. U-bent optical sensor at aconcentration of 2ppm and 5ppm had asensitivity of 0.2067 dBm/ppm and -0.7995 dBm/ppm, respectively. At a level of 2ppm - 5ppm, the optical sensor has a linear response with asensitivity of -0.283 dBm/ppm. The sensor takes 9.5 minutes to reach steady stateat aconcentration of 1 ppm. Atalevel of 2ppm - 5ppm, the sensor takes 5 minutes to 10.45 minutes to reach steady state. © Published under licence by IOP Publishing Ltd.
Physics Department, Faculty of Natural Sciences and Mathematics, Universitas Negeri Semarang, Semarang, Indonesia; Mechanical Engineering, Universitas Dipenogoro, Semarang, Indonesia
