DOI QR코드

DOI QR Code

편광유지 광자결정 광섬유 기반 편광 간섭형 스트레인 센서의 센싱 광섬유 길이 의존성 연구

Study on Dependence of Polarization-Maintaining Photonic Crystal Fiber-Based Polarimetric Strain Sensor on Sensing Fiber Length

  • 노태규 (부경대학교 전기공학과) ;
  • 이용욱 (부경대학교 전기공학과)
  • Noh, Tae-Kyu (School of Electrical Engineering, Pukyong National University) ;
  • Lee, Yong-Wook (School of Electrical Engineering, Pukyong National University)
  • 투고 : 2012.10.19
  • 심사 : 2013.01.25
  • 발행 : 2013.02.28

초록

In this paper, we implemented a polarimetric strain sensor using a Sagnac birefringence interferometer composed of a polarization-maintaining photonic crystal fiber (PM-PCF). By changing the length of the PM-PCF employed as the sensor head of the proposed sensor, the length dependence of the strain sensitivity was investigated. With respect to 5.0-, 7.5-, and 10.0-cm-long PM-PCFs, strain measurements were done in a measurement range of $0{\sim}6m{\varepsilon}$, and strain sensitivities of ~2.04, ~1.92, and ${\sim}1.73pm/{\mu}{\varepsilon}$ were obtained, respectively. If an ideal PM-PCF with no length dependence of a modal birefringence is used for the proposed sensor, the strain sensitivity is independent of the length of the sensor head (PM-PCF). In the practical PM-PCF used in experiments, however, a shorter PM-PCF has a higher length dependence of the modal birefringence due to its imperfectness and nonuniformity of the internal structure, resulting in a higher length dependence of the strain sensitivity.

키워드

참고문헌

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피인용 문헌

  1. D-Shaped Polarization Maintaining Fiber Sensor for Strain and Temperature Monitoring vol.16, pp.9, 2016, https://doi.org/10.3390/s16091505