Intensity and Wavelength Division Multiplexing FBG Sensor System Using a Raman Amplifier and Extreme Learning Machine

Figure 1

The schematic diagram of the proposed system (EDFA: erbium-doped fiber amplifier; OSA: optical spectrum analyzer; OC: optical coupler; FBG: fiber Bragg grating; SMF: single-mode fiber; WDM: wavelength division multiplexing; PBC: polarization beam combiner; LD: laser diode; PC: personal computer).