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

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

Fang Fang1, Bing Sun1、*, Zuxing Zhang1、**, 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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    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 HE11 and HE21 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 next=1.33 (Dw=2.2−2.6  μm).

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

    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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    (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.

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

    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," Chin. Opt. Lett. 17, 110604 (2019)

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    Paper Information

    Category: Fiber Optics and Optical Communications

    Received: May. 6, 2019

    Accepted: Jul. 5, 2019

    Posted: Jul. 5, 2019

    Published Online: Sep. 16, 2019

    The Author Email: Bing Sun (b.sun@njupt.edu.cn), Zuxing Zhang (zxzhang@njupt.edu.cn)

    DOI:10.3788/COL201917.110604

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology