Title :
Water penetration sensing wavelength tunable OTDR
Author :
Tateda, Milsuhiro ; Horiguchi, Tsuneo
Author_Institution :
NTT Corp., Ibaraki, Japan
Abstract :
A method for sensing water penetration into optical cable using a wavelength tunable optical time domain reflectometers (OTDR) is proposed. The reflectivity at every Fabry-Perot connector gap contained in a monitoring fiber has periodic wavelength dependence. It is shown 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 :
fibre optic sensors; optical cables; optical testing; time-domain reflectometry; tuning; water; Fabry-Perot connector gap; cable water penetration sensing; fibre optic sensors; monitoring fiber; optical cable; periodic wavelength dependence; reflectivity; refractive index; wavelength period change; wavelength tunable optical time domain reflectometers; Connectors; Monitoring; Optical coupling; Optical fiber couplers; Optical fibers; Optical modulation; Optical pulses; Pulse measurements; Pulse modulation; Reflectivity;
Journal_Title :
Photonics Technology Letters, IEEE
