›› 2015, Vol. 24 ›› Issue (4): 44202-044202.doi: 10.1088/1674-1056/24/4/044202

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

All-fiber modal interferometer based on an up-taper-core-offset structure for curvature sensing

马林, 齐艳辉, 孙将, 康泽新, 简水生   

  1. Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2014-08-28 修回日期:2014-10-03 出版日期:2015-04-05 发布日期:2015-04-05

All-fiber modal interferometer based on an up-taper-core-offset structure for curvature sensing

Ma Lin (马林), Qi Yan-Hui (齐艳辉), Sun Jiang (孙将), Kang Ze-Xin (康泽新), Jian Shui-Sheng (简水生)   

  1. Key Laboratory of All Optical Network and Advanced Telecommunication Network of EMC, Beijing Jiaotong University, Beijing 100044, China
  • Received:2014-08-28 Revised:2014-10-03 Online:2015-04-05 Published:2015-04-05
  • Contact: Ma Lin, Qi Yan-Hui E-mail:lin.ma.wf@gmail.com;11111012@bjtu.edu.cn

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摘要： A high-sensitivity curvature sensor based on an up-taper-core-offset structure is proposed and demonstrated in this paper. Here two specially designed cascaded up-tapers with maximum diameters of 247 μm and 251 μm, respectively, are used as a cladding mode exciting component. The excited cladding modes will propagate in the cladding and re-couplers with the core mode at the core-offset jointing point. When the curvature is changed, the dip wavelength of the sensor will shift to a blue wavelength and an average curvature sensitivity of more than -12.5 nm/m-1 is achieved within the measured curvature intervals.

关键词: curvature sensor, up-taper, core-offset, modal interferometer

Abstract: A high-sensitivity curvature sensor based on an up-taper-core-offset structure is proposed and demonstrated in this paper. Here two specially designed cascaded up-tapers with maximum diameters of 247 μm and 251 μm, respectively, are used as a cladding mode exciting component. The excited cladding modes will propagate in the cladding and re-couplers with the core mode at the core-offset jointing point. When the curvature is changed, the dip wavelength of the sensor will shift to a blue wavelength and an average curvature sensitivity of more than -12.5 nm/m-1 is achieved within the measured curvature intervals.

Key words: curvature sensor, up-taper, core-offset, modal interferometer

中图分类号:  (Interference)

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