Improvement on refractive index sensing by exploiting the tapered two-mode fibers

Fang Fang; Bing Sun; Zuxing Zhang; Jing Xu; Lin Zhang

doi:10.3788/COL201917.110604

Journals >Chinese Optics Letters >Volume 17 >Issue 11 >Page 110604 > Article

Chinese Optics Letters
Vol. 17, Issue 11, 110604 (2019)

Improvement on refractive index sensing by exploiting the tapered two-mode fibers | On the Cover

Fang Fang¹, Bing Sun^1、*, Zuxing Zhang^1、**, Jing Xu², and Lin Zhang³

Author Affiliations

¹Advanced Photonic Technology Laboratory, College of Electronics and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

²Optical Communications Laboratory, Ocean College, Zhejiang University, Zhoushan 316021, China

³Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, UK

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DOI: 10.3788/COL201917.110604 Cite this Article Set citation alerts

Fang Fang, Bing Sun, Zuxing Zhang, Jing Xu, Lin Zhang. Improvement on refractive index sensing by exploiting the tapered two-mode fibers[J]. Chinese Optics Letters, 2019, 17(11): 110604 Copy Citation Text

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Schematic diagram of the sensor. Continuous-mode evolutions of HE11 and HE21 modes when the two modes are launched into the fiber, respectively.

Fig. 1. Schematic diagram of the sensor. Continuous-mode evolutions of

{HE}_{11}

and

{HE}_{21}

modes when the two modes are launched into the fiber, respectively.

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Calculated dispersion factor coefficient G along with the microfiber diameter variation in the external medium of (a) air and (b) 1.33. (c) Simulated RI sensitivities for the TTMF when next=1.33 (Dw=2.2−2.6 μm).

Fig. 2. Calculated dispersion factor coefficient G along with the microfiber diameter variation in the external medium of (a) air and (b) 1.33. (c) Simulated RI sensitivities for the TTMF when

n_{ext} = 1.33 (D_{w} = 2.2 - 2.6 μ m)

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Fig. 3. Variation of the interference spectra of the TTMF when immersed in (a) air, (b) flow cells, and (c) glycerol solution.

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Fig. 4. (a) Variation of interferential spectra as the ambient RIs increase from 1.32658 to 1.32875. (b) Wavelength shifts of dips (A, B, and C) versus ambient RIs.

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Fig. 5. Transmission spectra and FWHM of the proposed sensor in glycerol solution with RI ranging from 1.32658 to 1.32688.

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Fang Fang, Bing Sun, Zuxing Zhang, Jing Xu, Lin Zhang. Improvement on refractive index sensing by exploiting the tapered two-mode fibers[J]. Chinese Optics Letters, 2019, 17(11): 110604

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