Strain-Temperature Discrimination Using Multimode Interference in Tapered Fiber

被引：49

作者：

Andre, Ricardo M. ^{[1
,2
]}

Biazoli, Claudecir R. ^{[3
]}

Silva, Susana O. ^{[1
,2
]}

Marques, Manuel B. ^{[1
,2
]}

Cordeiro, Cristiano M. B. ^{[3
]}

Frazao, Orlando

机构：

[1] Univ Porto, INESC Porto, Fac Ciencias, Inst Engn Sistemas & Comp Porto, P-4169007 Oporto, Portugal

[2] Univ Porto, Dept Fis & Astron, Fac Ciencias, P-4169007 Oporto, Portugal

[3] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083859 Campinas, SP, Brazil

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2013年 / 25卷 / 02期

关键词：

Multimode interference devices; optical fiber sensors; optical fiber tapers; strain and temperature measurement; BRAGG GRATINGS; SENSITIVITY;

D O I：

10.1109/LPT.2012.2230617

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Tapering single-mode-multimode-single-mode structures to enhance sensitivity is proposed and experimentally demonstrated. 50-mm-long coreless multimode fiber sections are spliced between single-mode fibers (SMFs) and tapered. They are characterized in strain, and an increase in strain sensitivity is obtained with taper diameter reduction. Sensitivities as high as -23.69 pm/mu epsilon for the 15-mu m taper are attained. Temperature sensitivities also depend on taper diameter. A combination of two different diameter tapered SMF MMF-SMF structures, with cross-sensitivity to strain and temperature, is proposed as a sensing system for the simultaneous measurement of strain and temperature with resolutions of +/-5.6 mu epsilon and +/-1.6 degrees C, respectively. A good condition number of 3.16 is achieved with this sensing structure.

引用

页码：155 / 158

页数：4

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