Suspended ring-core photonic crystal fiber gas sensor with high sensitivity and fast response

Sahar Hosseinzadeh Kassani, Reza Khazaeinezhad, Yongmin Jung, Jens Kobelke, Kyunghwan Oh

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


We demonstrate the design and fabrication of an in-line evanescent field gas sensor based on a novel suspended ring-core photonic crystal fiber (PCF) to further overcome limitations in sensing capability. The suspended ring-core PCF is made by the stack-and-draw technique with a large central capillary of ∼60 μm and adapted small capillaries in a larger cladding tube. Sensing capabilities of two variations of the proposed suspended ring-core PCFs were investigated experimentally by detecting absorption lines of acetylene gas. The sensitivity of the two PCF structures was also numerically analyzed using a full-vectorial finite-element method. The dynamic response of the sensors was quantified in detail. The results demonstrated significant improvement in both sensitivity and response time of the suspended ring-core PCF as this special PCF can provide larger gas diffusion and higher overlap between the sensing species and the guided light than either a Ge-doped ring defect PCF or a conventional index-guided PCF.

Original languageEnglish
Article number7021904
JournalIEEE Photonics Journal
Issue number1
Publication statusPublished - 2015 Feb 1

Bibliographical note

Publisher Copyright:
© 2009-2012 IEEE.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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