Simultaneous measurement on strain and temperature via guided acoustic-wave Brillouin scattering in single mode fibers

doi:10.7498/aps.65.240702

CORC > 兰州理工大学 > 兰州理工大学 > 理学院

	Simultaneous measurement on strain and temperature via guided acoustic-wave Brillouin scattering in single mode fibers
	Deng Chun-Yu; Hou Shang-Lin; Lei Jing-Li; Wang Dao-Bin; Li Xiao-Xiao
刊名	ACTA PHYSICA SINICA
	2016-12-20
卷号	65 期号:24
关键词	fiber guided acoustic-wave Brillouin scattering temperature strain
ISSN号	1000-3290
DOI	10.7498/aps.65.240702
英文摘要	During the last decade, fiber sensor has drawn extensive attention due to its flexible, insulating, and readily operating in most measurement environment. But generally, fiber sensor is sensitive to more than one environmental parameter at the same time, so the cross sensitivity limits the application of the sensor. In the present work, a novel design scheme of sensing simultaneously temperature and strain via guided acoustic-wave Brillouin scattering is proposed for resolving the cross sensitivity induced by temperature and strain in single mode fibers. In the guided acoustic-wave Brillouin scattering which occurs due to the interaction between two optical co-propagating waves and the transverse acoustic wave in optical fiber, multi spectrum peaks appear when the frequencies of pump and Stokes are appropriate. Brillouin frequency shift is dependent on elastic property of fiber material such as sound velocity, density, Young's modulus, etc. and these elastic properties are influenced by the surroundings. So Brillouin spectrum changes with temperature and strain. Because different acoustic modes of guided acoustic-wave Brillouin scattering have different sensitivities to temperature and strain, characteristic frequencies of different acoustic modes shift at different levels. Then the influences of temperature and strain on elastic property of fiber material, and the relationship between material properties and characteristic frequency of each acoustic mode can be worked out, therefore the temperature and strain can be calculated by the different influences of temperature and strain on each acoustic mode. The simulation results indicate that the temperature sensitivity of R-02 mode is 0.86% lower than that of TR25 in the SMF-28 fiber, but the strain sensitivity of R-02 mode is 54.1% higher than that of TR25. Temperature sensitivity of R-02 is approximately equal to that of TR25, but strain sensitivity of R-02 is obviously diferent from that of TR25. So the influences of temperature and strain on Brillouin frequency shift can be effectively distinguished, thereby simultaneous measurements of temperature and strain can be realized by guided acoustic-wave Brillouin scattering.
资助项目	National Natural Science Foundation of China[61665005][61167005][61367007] ; Natural Science Foundation of Gansu Province, China[1112RJZA018][1112RJZA017]
WOS研究方向	Physics
语种	中文
出版者	CHINESE PHYSICAL SOC
WOS记录号	WOS:000392923500006
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33500]
专题	理学院
通讯作者	Hou Shang-Lin
作者单位	Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Deng Chun-Yu,Hou Shang-Lin,Lei Jing-Li,et al. Simultaneous measurement on strain and temperature via guided acoustic-wave Brillouin scattering in single mode fibers[J]. ACTA PHYSICA SINICA,2016,65(24).
APA	Deng Chun-Yu,Hou Shang-Lin,Lei Jing-Li,Wang Dao-Bin,&Li Xiao-Xiao.(2016).Simultaneous measurement on strain and temperature via guided acoustic-wave Brillouin scattering in single mode fibers.ACTA PHYSICA SINICA,65(24).
MLA	Deng Chun-Yu,et al."Simultaneous measurement on strain and temperature via guided acoustic-wave Brillouin scattering in single mode fibers".ACTA PHYSICA SINICA 65.24(2016).