Title :
Novel Technique to Improve Spatial Resolution in Brillouin Optical Time-Domain Reflectometry
Author :
Koyamada, Y. ; Sakairi, Y. ; Takeuchi, N. ; Adachi, S.
Author_Institution :
Ibaraki Univ., Ibaraki
Abstract :
A novel Brillouin optical time-domain reflectometry (BOTDR) system, called a double-pulse BOTDR (DP-BOTDR) system, is proposed for measuring distributed strain and temperature in a fiber with a sub-meter spatial resolution. Our experiment confirmed that the DP-BOTDR system enables us to measure the distributed Brillouin frequency shift, i.e., the distributed strain and temperature, with a spatial resolution of 20 cm. This spatial resolution is five times better than that provided by the conventional single-pulse BOTDR system.
Keywords :
Brillouin spectra; fibre optic sensors; optical fibre testing; optical time-domain reflectometry; spectral methods of temperature measurement; strain measurement; Brillouin optical time-domain reflectometry; distributed Brillouin frequency shift; double-pulse BOTDR; spatial resolution; sub-meter spatial resolution; Acoustic scattering; Brillouin scattering; Frequency measurement; Optical scattering; Optical sensors; Reflectometry; Spatial resolution; Strain measurement; Temperature sensors; Time domain analysis; Brillouin scattering; distributed sensor; fiber sensor; optical time-domain reflectometry (OTDR); strain measurement; temperature measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.908651
