Fabrication, characterization, and sensing applications of a high-birefringence suspended-core fiber

Zhengyong Liu, Chuang Wu, Ming Leung Vincent Tse, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

25 Citations (Scopus)

Abstract

In this paper, we report on the fabrication, characterization, and sensing applications of a high-birefringence suspended-core fiber (HB-SCF) using the stack-and-draw technique. Capillaries in two sizes were used for stacking, forming an elliptical core, giving rise to geometric modal birefringence of the HB-SCF. Through a finite-element method, the theoretical values of the phase and group modal birefringence of the HB-SCF were found to be 2.59 \times 10-4and 4.75 \times 10-4, respectively. Based on a Sagnac interferometer (SI), the group modal birefringence of the HB-SCF was measured to be 4.84 \times 10-4, which agrees well with the theoretical result. The sensing characteristics of the HB-SCF SI for pressure, strain, and torsion measurements were analyzed theoretically and investigated experimentally. It exhibits sensitivities of 2.82 nm/MPa for hydrostatic pressure, 0.43 pm/με for strain, and 0.0157/° for torsion measurements. The HB-SCF is made entirely of pure silica without stress-applying parts, thus its modal birefringence is thermally insensitive, resulting in a low temperature sensitivity of ∼1 pm/°C.
Original languageEnglish
Article number6807654
Pages (from-to)2113-2122
Number of pages10
JournalJournal of Lightwave Technology
Volume32
Issue number11
DOIs
Publication statusPublished - 1 Jun 2014

Keywords

  • Birefringence
  • microstructured optical fiber
  • optical fiber sensors
  • Sagnac interferometer
  • suspended-core fiber (SCF)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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