Improved KLT Algorithm for High-Precision Wavelength Tracking of Optical Fiber Bragg Grating Sensors

Figure 6

Variation of the second-rank eigenvalue , normalized as in Figure 4, for different values of SNR (65 dB, 55 dB, and 45 dB) and different wavelength shift ranges (±5 pm, ±0.5 pm, and ±0.05 pm). The charts report both the simulated data (blue) and the linear fit (red).