Signal Demodulation for Surface Plasmon Resonance Tilted Fiber Bragg Grating Based on Root Sum Squared Method. - Cheong-Weng Ooi; Kok-Sing Lim; Waldo Udos; Yen-Jie Ee; Muhammad Nur Syafiq Mohamad Ismail; Rozalina Zakaria; Hangzhou Yang; Harith Ahmad (IEEE Trans. Instrum. Meas., 2021)