Design of a dual-core dual-hole fiber for hydrostatic pressure sensing

D. Chen, G. Hu, M. L.V. Tse, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)


We propose a novel dual-core dual-hole fiber (DCDHF) for hydrostatic pressure sensing. Two fiber cores and two air holes are employed in the cross-section of the DCDHF. The mode coupling between two fiber cores of the DCDHF is sensitive to the pressure-induced index change which ensures the detection of the pressure applied to the DCDHF. Two large air holes are employed to enhance the pressure-induced index change for the DCDHF which essentially provides a built-in transducing mechanism to enhance the sensitivity for the DCDHF-based pressure sensor. The DCDHF-based pressure sensor is simply formed by splicing a segment of DCDHF to two segments of single mode fibers and its operation principle is introduced in details. Simulations show that there is a linear relationship between the pressure untilized on the DCDHF and the wavelength shift of the output spectrum at one fiber core of the DCDHF with a fixed length when the polarized light is injected into another fiber core of the DCDHF. DCDHFs with different structure parameters for pressure sensing are also investigated.
Original languageEnglish
Pages (from-to)2615-2619
Number of pages5
JournalOptics Communications
Issue number10-11
Publication statusPublished - 15 May 2012


  • Dual-core
  • Dual-hole
  • Mode coupling
  • Pressure sensor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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