Research Article
Intensity and Wavelength Division Multiplexing FBG Sensor System Using a Raman Amplifier and Extreme Learning Machine
Figure 7
The reflected spectra of three FBG sensors from OSA (a) when the spectra of FBG1 and FBG2 are fully overlapped at strain step 4 (b) when the spectra of FBG1 and FBG3 are fully overlapped at strain step 8.
| (a) |
| (b) |