| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber sensing system and a measuring method for wavelength of laser light capable of measuring with high accuracy and high multiplexing. SOLUTION: An optical fiber sensing system 101 is composed of an excitation light source 111, an optical circulator 115, a wavelength measuring instrument 117, an optical fiber 119, more than one optical coupler C1, C2,... and more than one FBG laser sensor LS101, LS102,.... Each FBG laser sensor LS101, LS102,... is branch-connected to the fiber 119 by the coupler C1, C2,.... Each FBG laser sensor LS101, LS102,... have parallel relation to each other. Then, occurrences of multiple reflected lights between each FBG laser sensor LS101, LS102,... are suppressed and a S/N ratio is improved. |
