The Optimization of Multimode Fiber Speckle Sensor for Microvibration

Figure 3

NIPC curve of vibration. NIPC curve of quartz step fiber: (a) 50 μm silica fiber; (b) 62.5 μm silica fiber; (c) 105 μm silica fiber; (d) 200 μm silica fiber; (e) 250 μm silica fiber; (f) 500 μm polymer optical fiber; (g) 1000 μm polymer optical fiber Inset: FFT curve.

(a)

(b)

(c)

(d)

(e)

(f)

(g)