The Optimization of Multimode Fiber Speckle Sensor for Microvibration

Figure 5

First-moment curve of vibration. The first-moment curve of different fibers: (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, and (g) 1000 μm polymer optical fiber. Inset: FFT curve.

(a)

(b)

(c)

(d)

(e)

(f)

(g)