Cascaded tilted fiber Bragg grating for enhanced refractive index sensing

Biqiang Jiang*, Zhixuan Bi, Shouheng Wang, Teli Xi, Kaiming Zhou, Lin Zhang, Jianlin Zhao

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

We proposed and experimentally demonstrated a cascaded tilted fiber Bragg grating (TFBG) for enhanced refractive index sensing. The TFBG is UV-inscribed in series in ordinary single-mode fiber (SMF) and reduced-diameter SMF with the same tilt angle, and then excites two sets of superposed spectral combs of cladding modes. The cascaded TFBG with total length of 18 mm has a much wider wavelength range over 100 nm and narrower wavelength separation than that of a TFBG only in the SMF, enabling an enlarged range and a higher accuracy of refractive index measurement. The fabricated TFBG with the merits of enhanced sensing capability and temperature self-calibration presents great potentials in the biochemical sensing applications.

Original languageEnglish
Article number114220
JournalChinese Physics B
Volume27
Issue number11
Early online date8 Oct 2018
DOIs
Publication statusE-pub ahead of print - 8 Oct 2018

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Bragg gratings
refractivity
fibers
wavelengths

Keywords

  • Fiber optics sensors
  • Refractive index measurement
  • Tilted fiber Bragg grating

Cite this

Jiang, Biqiang ; Bi, Zhixuan ; Wang, Shouheng ; Xi, Teli ; Zhou, Kaiming ; Zhang, Lin ; Zhao, Jianlin. / Cascaded tilted fiber Bragg grating for enhanced refractive index sensing. In: Chinese Physics B. 2018 ; Vol. 27, No. 11.
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Cascaded tilted fiber Bragg grating for enhanced refractive index sensing. / Jiang, Biqiang; Bi, Zhixuan; Wang, Shouheng; Xi, Teli; Zhou, Kaiming; Zhang, Lin; Zhao, Jianlin.

In: Chinese Physics B, Vol. 27, No. 11, 114220, 08.10.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Cascaded tilted fiber Bragg grating for enhanced refractive index sensing

AU - Jiang, Biqiang

AU - Bi, Zhixuan

AU - Wang, Shouheng

AU - Xi, Teli

AU - Zhou, Kaiming

AU - Zhang, Lin

AU - Zhao, Jianlin

PY - 2018/10/8

Y1 - 2018/10/8

N2 - We proposed and experimentally demonstrated a cascaded tilted fiber Bragg grating (TFBG) for enhanced refractive index sensing. The TFBG is UV-inscribed in series in ordinary single-mode fiber (SMF) and reduced-diameter SMF with the same tilt angle, and then excites two sets of superposed spectral combs of cladding modes. The cascaded TFBG with total length of 18 mm has a much wider wavelength range over 100 nm and narrower wavelength separation than that of a TFBG only in the SMF, enabling an enlarged range and a higher accuracy of refractive index measurement. The fabricated TFBG with the merits of enhanced sensing capability and temperature self-calibration presents great potentials in the biochemical sensing applications.

AB - We proposed and experimentally demonstrated a cascaded tilted fiber Bragg grating (TFBG) for enhanced refractive index sensing. The TFBG is UV-inscribed in series in ordinary single-mode fiber (SMF) and reduced-diameter SMF with the same tilt angle, and then excites two sets of superposed spectral combs of cladding modes. The cascaded TFBG with total length of 18 mm has a much wider wavelength range over 100 nm and narrower wavelength separation than that of a TFBG only in the SMF, enabling an enlarged range and a higher accuracy of refractive index measurement. The fabricated TFBG with the merits of enhanced sensing capability and temperature self-calibration presents great potentials in the biochemical sensing applications.

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KW - Refractive index measurement

KW - Tilted fiber Bragg grating

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