Simultaneous independent measurement of strain and temperature based on long-period fiber gratings inscribed in holey fibers depending on air-hole size

Young Geun Han, Suho Song, Gil Hwan Kim, Kwanil Lee, Sang Bae Lee, Ju Han Lee, Chang Hyun Jeong, Chi Hwan Oh, Hee Jeon Kang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We propose and experimentally demonstrate a simple and flexible scheme for the simultaneous measurement of strain and temperature using long-period fiber gratings (LFFGs) based on versatile holey fibers (HFs) with different air-hole sizes. The strongly resonant LPFGs (as much as ∼24 dB) can be successfully achieved. The LPFGs inscribed in the HFs have similar temperature sensitivities regardless of air-hole size because of the same material composition. The strain sensitivities of the LPFGs, however, are different, since holey fibers have different cross-sectional areas depending on the air-hole size. The strain sensitivities of the HF-based LFFGs are enhanced by a factor larger than 2 as the air-hole size increases.

Original languageEnglish
Pages (from-to)2245-2247
Number of pages3
JournalOptics Letters
Volume32
Issue number15
DOIs
StatePublished - 1 Aug 2007

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