| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the acceleration sensor which can obtain a long-term reliability by detecting the vibration acceleration even when the object of measurement is located in liquid. SOLUTION: This acceleration sensor includes the following parts. An input- side coupler 2 divides input measuring laser light into two light beams and outputs the beams. An optical fiber 3a is the optical fiber, which is mounted on a circular vibrating plate 9, on which vibration is applied in the spiral state and outputs the input light from the optical coupler 2 to the optical fiber 4. An optical fiber 3b is the optical fiber, which is wound around the structure that is not deformed by the application of vibration, and outputs the input light from the optical coupler 2. The output side optical coupler 4 combines the output light of the optical fibers 3a and 3b and outputs the interference light. The vibration-plate type optical fiber acceleration sensor part having these parts is included.</p> |
