Distributed Temperature Sensing (DTS) has been used in a variety of different applications. Its ability to detect temperature fluctuations along fiber optic lines that stretch for several kilometers has made it a popular topic in various fields of science, engineering, and technology. From pre-fire detection to ecological monitoring, DTS has taken a vital role in scientific research. DTS uses the principle of backscattering by three different spectral components, e.g., Rayleigh scattering, Brillouin scattering, and Raman scattering. Although there have been various improvements to DTS, its slow response time and poor spatial resolution have been hard to overcome. Its repetition rate is low because the pulse must travel the distance of the fiber optic line and return to the detector to record the temperature change along the fiber. A spatial resolution of 7.4 cm with a response time as low as 1 second and a temperature resolution of the 0.196 ℃ is achieved from the current Raman-based DTS system. This research proves that high-spatial resolution can be obtained with the use of a Silicon Avalanche Photodetector with a 1 GHz bandwidth. / MS / Sensors have been used for a variety of purposes such as to measure temperature and strain. Recent literature suggests that distributed temperature sensing (DTS) is a unique approach to measure temperature. DTS allows continuous, real-time measurements along a fiber optic cable. My research focused on improving the DTS system. A high-resolution Raman-based DTS was developed by 1) enhancing its spatial resolution, 2) shortening response time, 3) improving temperature resolution, and 4) extending the sensing distance. By enhancing these parameters, it will provide a wide range of new possibilities to the field of optical fiber sensing.
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/95934 |
| Date | 12 June 2018 |
| Creators | Frazier, Janay Amber Wright |
| Contributors | Electrical Engineering, Wang, Anbo, Zhou, Wei, Zhu, Yizheng |
| Publisher | Virginia Tech |
| Source Sets | Virginia Tech Theses and Dissertation |
| Detected Language | English |
| Type | Thesis |
| Format | ETD, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
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