Bending and strain sensitivities in a helicoidal long-period fiber gratings

Hojoong Jung, Woojin Shin, Jun Ki Kim, Seung Han Park, Do Kyeong Ko, Jongmin Lee, Kyunghwan Oh

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


In this letter, we report bending and strain sensitivities of helicoidal long-period fiber gratings fabricated by twisting single-mode fibers during CO2 laser irradiation. Linear spectral shifts of the resonant wavelengths under the bending and tensile strain were observed with the sensitivities of 11.7 nm/m-1 and 1.1 pm/μ ε, respectively. The corresponding transmission power variations at the resonance wavelength were 4.1/m-1 and 2.2 × 10-4dB/με, respectively. Detailed measurement techniques and sensor applications are discussed.

Original languageEnglish
Pages (from-to)1232-1234
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number17
Publication statusPublished - 2009 Sept 1

Bibliographical note

Funding Information:
Manuscript received April 20, 2009; revised May 24, 2009. First published June 10, 2009; current version published August 19, 2009. This work was supported in part by Korea Science and Engineering Foundation under Program ROA-2008-000-20054-0 and Program R15-2004-024-00000-0, by Korea Foundation for International Cooperation of Science under Program 2008-8-1893 (GOSPEL project), by the Institute of Industrial Technology Evaluation and Planning under Program 2007-8-2074 and Program 2008-8-1195, and by the Brain Korea 21 Project of the Korea Research Foundation.

All Science Journal Classification (ASJC) codes

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


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