Table 2: Material parameters of FBG.
Symbol | Quantity | Value |
Ef | Elasticity modulus of fiber | 7.2 × 1010 Pa |
v | Passion ratio of fiber | 0.17 |
pij | The photo-elastic constant | P11 = 0.121, P12 = 0.27 |
lf | Length of grating area | 10 mm |
λB | Initial center wavelength | 1550.0825 nm |