A curvature sensor based on twisted single-mode-multimode-single-mode hybrid optical fiber structure

Ke Tian, Yifan Xin, Wenlei Yang, Tao Geng, Jing Ren, Ya Xian Fan, Gerald Farrell, Elfed Lewis, Pengfei Wang

Research output: Contribution to journalArticlepeer-review

Abstract

An optical fiber curvature sensor based on a twisted multimode fiber (MMF) sandwiched between two single-mode fibers (SMF) is proposed and investigated theoretically and experimentally. The measured transmission spectrum exhibits good agreement with theoretical predictions. Compared with a traditional single-mode-multimode-single-mode fiber structure sensor, the proposed configuration offers a higher average curvature sensitivity of -2.42 nm/m-1 over a curvature measurement range of 0-1.7390 m-1 and -7.09 dB/m-1 at an operating wavelength of 1537 nm. The temperature sensitivity of this sensor has been determined as 0.01 nm/°C over a wavelength range of 1535-1550 nm and circa 0.007 dB/°C at the wavelength of 1537 nm, over a measured temperature range of 21-121 °C.

Original languageEnglish
Article number7812632
Pages (from-to)1725-1731
Number of pages7
JournalJournal of Lightwave Technology
Volume35
Issue number9
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • Curvature sensor
  • Mach-Zehnder interferometer
  • multimode interference
  • temperature dependence

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