收稿日期: 2015-08-19
网络出版日期: 2017-08-30
基金资助
浙江省自然科学基金资助项目(LY17F050010)
Angle sensor with two cascading abrupt-taper based on interferometer and single mode optical fiber
Received date: 2015-08-19
Online published: 2017-08-30
周雨萌, 赵春柳, 时菲菲, 李裔, 董新永 . 基于单模光纤的双锥级联干涉型角度传感器[J]. 上海大学学报(自然科学版), 2017 , 23(4) : 543 -548 . DOI: 10.12066/j.issn.1007-2861.1714
This paper proposes a simple-fabricated and high sensitive angle sensor based on single mode optical fiber. The sensor consists of two cascading abrupt-tapers with different sizes, fabricated with CO2 laser. The cladding modes are excited in the first taper and interfered with the core mode in the second taper. When an angle applied on the sensor, length between the two tapers changes. At the same time, the first taper is bent, affecting the ratios and effective indices of the core mode, and the cladding modes excited by the first taper. As a consequence, the interference pattern has a shift. By monitoring the shift, angle measurement is achieved. Experimental results show that the sensor has a good linear relation in a certain measurement range. Sensitivity of the angle measurement is as high as 601.8 nm/(°) between 0.057 5° and 0.075 0°.
[1] Liang W, Huang Y, Xu Y, et al. Highly sensitive fiber Bragg grating refractive index sensors [J]. Appl Phys Lett, 2005, 86(15): 151122.
[2] Qian W W, Zhao C L, He S L, et al. High-sensitivity temperature sensor based on an alcoholfilled photonic crystal fiber loop mirror [J]. Opt Lett, 2011, 36: 1548-1550.
[3] QianWW, Zhao C L, Dong X Y, et al. Intensity measurement based temperature-independent strain sensor using a highly birefringent photonic crystal fiber loop mirror [J]. Optics Communications, 2010, 283: 5250-5254.
[4] Shen C Y, Zhong C. Novel temperature-insensitive fiber Bragg grating sensor for displacement measurement [J]. Sensors and Actuators A, 2011, 170: 51-54.
[5] Niu L, Zhao C L, Gong H P, et al. Curvature sensor based on two cascading abrupt-tapers modal interferometer in single mode fiber [J]. Optics Communications, 2014, 333: 11-15.
[6] Khiat A, Lamarque F, Prelle C, et al. High resolution fibre-optic sensor for angular displacement measurements [J]. Meas Sci Techno, 2010, 21: 1-10.
[7] Yuan L, Lin X, Liang Y, et al. Applications of angled-mirror in fiber optic sensor [J]. Optics & Laser Tech, 2000, 32: 255-260.
[8] Chen N K, Feng Z Z, Wang J J, et al. Interferometric interrogation of the inclination and displacement of tapered fiber Mach-Zehnder interferometers [J]. IEEE Sensors Journal, 2013,13: 9.
/
| 〈 |
|
〉 |
