| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber device that can restrain any decline of accuracy of detecting of optical fiber abnormality.SOLUTION: An optical fiber device is equipped with at least one optical fiber 31 on whose first face 31a a first light ray L1 and a second light ray L2 differing in wavelength from the first light ray come incident and a detector 43 that detects the second light ray L2. The optical fiber 31 is equipped with, on its first face 31a, a reflector 31c that transmits the first light ray L1 and reflects the second light ray L2, and the detector 43 detects the second light ray L2 reflected by the reflector 31c.SELECTED DRAWING: Figure 3 |
