| 摘要 |
There is provided a vibration detection apparatus and a vibration detection method. A vibration detection apparatus 1 includes a ring-shaped optical fiber 4, a fiber Brag grating (FBG) 6 and a detection system 3. The ring-shaped optical fiber 4 generates a laser beam propagating a ring shaped optical path. The FBG 6 is disposed in the ring-shaped optical fiber 4 such that the laser beam enters the FBG 6, and has a transmittance distribution characteristic of transmitted light in a wavelength direction, which changes in accordance with vibration of an object. The detection system 3 detects the vibration based on the transmitted light through the FBG 6. |
