Multimode interference refractive index sensor based on coreless fiber

被引：36

作者：

Li Y. ^{[1
]}

Liu Z. ^{[1
]}

Jian S. ^{[1
]}

机构：

[1] Institute of Lightwave Technology, Beijing Jiaotong University, Beijing

来源：

Photonic Sensors | 2014年 / 4卷 / 01期

基金：

中国国家自然科学基金;

关键词：

coreless fiber; multimode interference; Refractive index sensor;

D O I：

10.1007/s13320-013-0137-0

中图分类号：

学科分类号：

摘要：

A multimode interference refractive index (RI) sensor based on the coreless fiber was numerically and experimentally demonstrated. Two identical single mode fibers (SMF) are spliced at both ends of a section of the coreless fiber which can be considered as the equivalent weakly guiding multimode fiber (MMF) with a step-index profile when the surrounding refractive index (SRI) is lower than that of the coreless fiber. Thus, it becomes the conventional single-mode multimode single-mode (SMS) fiber structure but with a larger core size. The output spectra will shift along with the changes in the SRI owing to the direct exposure of the coreless fiber. The output spectra under different SRIs were numerically studied, as well as the sensitivities with different lengths and diameters of the coreless fiber. The predication and calculation showed the good agreement with the experimental results. The proposed RI sensor proved to be feasible by verification experiments, and the relative error was merely 0.1% which occupied preferable sensing performance and practicability. © The Author(s) 2013.

引用

页码：21 / 27

页数：6

共 14 条

[1]

Donlagi D.D., Zavrsnik M., Fiber-optic microbend sensor structure, Optics Letters, 22, 11, pp. 837-839, (1997)

[2]

Mohammed W.S., Mehta A., Johnson E.G., Wavelength tunable fiber lens based on multimode interference, Journal of Lightwave Technology, 22, 2, pp. 469-477, (2004)

[3]

Huang Z., Zhu Y., Chen X., Wang A., Intrinsic Fabry-Pérot fiber sensor for temperature and strain measurements, IEEE Photonics Technology Letters, 17, 11, pp. 2403-2405, (2005)

[4]

Li E., Lin X., Zhang C., Fiber-optic temperature sensor based on interference of selective higher-order modes, Applied Physics Letters, 89, 9, pp. 0911191-0911193, (2006)

[5]

Li E., Sensitivity-enhanced fiber-optic strain sensor based on interference of higher order modes in circular fibers, IEEE Photonics Technology Letters, 19, 10, pp. 1266-1268, (2007)

[6]

Wang Q., Farrell G., Yan W., Investigationon single-mode-multimode-single-mode fiber structure, Journal of Lightwave Technology, 26, 5, pp. 512-519, (2008)

[7]

Tripathi S.M., Kumar A., Varshney R.K., Kumar Y.B.P., Marin E., Meunier J.P., Strain and temperature sensing characteristics of single-modemultimode- single-mode structure, Journal of Lightwave Technology, 27, 13, pp. 2348-2356, (2009)

[8]

Wang K., Klimov D., Kolber Z., Seawater pH sensor based on the long period grating in a single-mode-multimode-single-mode structure, Optical Engineering, 48, 3, (2009)

[9]

Wu Q., Ma Y., Yuan J., Semenova Y., Wang P., Yu C., Et al., Evanescent field coupling between two parallel close contact SMS fiber structures, Optics Express, 20, 3, pp. 3098-3109, (2012)

[10]

Wang Q., Farrell G., All-fiber multimode-interference-based refractometer sensor: Proposal and design, Optics Letters, 31, 3, pp. 317-319, (2006)

← 1 2 →