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

Figure 9

Wavelength shift, estimated in experimental measurements carried out with a commercial spectrometer, operating at 5 kHz. (a) shows the response to a 25 Hz exponentially damped tone, while (b) shows the response in absence of stimuli.

(a)

(b)