Photonic Sensors, Volume. 3, Issue 4, 332(2013)
Distributed Discrimination of Strain and Temperature Based on Brillouin Dynamic Grating in an Optical Fiber
This paper reviews distributed discrimination of strain and temperature by use of an optical fiber based on fiber optic nerve systems. The preliminary method based on multiple resonance peaks of the Brillouin gain spectrum in a specially-designed fiber is firstly introduced. The complete discrimination of strain and temperature based on the Brillouin dynamic grating in a polarization maintaining fiber is extensively presented. The basic principle and two experimental schemes of distributed discrimination based on fiber optic nerve systems are demonstrated. The performance of the high discriminative accuracy (0.1 ℃-0.3 ℃ and 5-12 με) and high spatial resolution (~10 cm) with the effective measurement points of about 50 for a standard system configuration or about 1000 for a modified one will be highly expected in real industry applications.
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Kazuo HOTATE, Weiwen ZOU, Rodrigo Kendy YAMASHITA, and Zuyuan HE. Distributed Discrimination of Strain and Temperature Based on Brillouin Dynamic Grating in an Optical Fiber[J]. Photonic Sensors, 2013, 3(4): 332
Received: Jul. 16, 2013
Accepted: Aug. 30, 2013
Published Online: Nov. 14, 2013
The Author Email: HOTATE Kazuo (hotate@sagnac.t.u-tokyo.ac.jp)