A Study on the Jacket Effect of Fiber Optic Sensor
With the rapid development of distributed fiber optic sensor, such as Brillouin Optical Time Domain Reflectometry (BOTDR), much more importance is attached to the performance of optical fiber. As a conductive and sensing element, optical fiber must be protected from damage and meanwhile be sensitive to strain and temperature. Therefore, tight-buffered optical fiber with a jacket is often used in a certain harsh environment instead of ordinary optical fiber. The jacket can protect optical fiber, on the other hand, exert effect on the optical fibers sensitivity to temperature and strain.In this paper, two types of optical fiber, i.e. with jacket (Type-A) and without jacket (Type-B),were selected to study the jacket effect on strain measurement, and relative experiment schemes and results are present. It is found that the strain of Type-A, measured by BOTDR, changed with time under constant load stretching within 48 hours, while the Type-B kept constant. After that the load was removed to let the fiber relax. After several days, then again loaded and measured.Through three cycles, the strain measurements of the Type-A gradually increased, but the accretions become smaller and smaller. These experiment results indicate that the jacket has the creep deformation that effects the strain measurement.
Fiber Optic sensor Jacket Effect Strain Monitoring BOTDR Distributed Measurement
Y.Ding B.Shi X.Bao J.Q.Gao
ACEI, Department of Earth Science, Nanjing University Via Hankou Road 22, 210093 Nanjing, China Physics Department, University of Ottawa Via ON KIN 6N5, Canada
国际会议
南京
英文
133-138
2007-10-18（万方平台首次上网日期，不代表论文的发表时间）