Title :
Water penetration sensing using wavelength tunable OTDR
Author :
Tateda, Mitsuhiro ; Horiguchi, Tsuneo
Author_Institution :
NTT Corp., Ibaraki, Japan
Abstract :
A method for sensing penetration of water into optical cable using a wavelength-tunable optical time-domain reflectometer (OTDR) is proposed. The reflectivity at every Fabry-Perot connector gap contained in a monitoring fiber has periodic wavelength dependence. It is confirmed experimentally that water penetration into a connector gap results in a wavelength period change, the ratio of which coincides with the refractive index of water regardless of the size of the gap.<>
Keywords :
optical cables; optical fibres; time-domain reflectometry; Fabry-Perot connector gap; monitoring fiber; optical cable; periodic wavelength dependence; reflectivity; refractive index; water penetration sensing; wavelength period change; wavelength-tunable optical time-domain reflectometer; Connectors; Fabry-Perot; Monitoring; Optical fiber cables; Optical refraction; Optical sensors; Optical variables control; Reflectivity; Refractive index; Time domain analysis;
Journal_Title :
Photonics Technology Letters, IEEE
