Long-period fiber grating temperature sensor based on intensity measurement

Yunqi Liu, Chunfeng Ge, Donghui Zhao, Zhiguo Liu, Zhuanyun Guo, Xiaoyi Dong, Hwa Yaw Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


It is investigated the temperature properties of long period fiber grating (LPG). The measured temperature coefficient is 0. 0 8 6 nm/°C, which is about 8. 2 times higher than the typical value for a normal fiber Bragg grating. It is investigated the temperature sensing properties of LPG based on intensity measurement, by using long period fiber grating as sensor element and using tunable erbium-doped fiber ring laser as optical source. In the temperature range of 74 °C, the loss (logarithm of intensity) of the laser is linear with the measuring temperature and the linearity can be repeated well. The resolution of temperature measurement is 0. l°C.
Original languageChinese (Simplified)
Pages (from-to)356-359
Number of pages4
JournalGuangzi Xuebao/Acta Photonica Sinica
Issue number4
Publication statusPublished - 1 Dec 1999


  • Intensity measurement
  • Long period fiber grating
  • Temperature sensor

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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