High-sensitivity 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 publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)


An all fiber temperature sensor based on intensity measurement is designed, by using long period fiber grating (LPG) as sensor element and using tunable Er-doped fiber ring laser as optical source. The measured temperature sensitivity of LPG is 0.086 nm/°C, which is about 8.2 times higher than typical value for a normal fiber Bragg grating. In the temperature range of 74 °C, the loss of the laser is linear with the measured temperature and the linearity can be repeated well. The resolution of temperature measurement is 0.1 °C.
Original languageEnglish
Pages (from-to)492-495
Number of pages4
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Jan 1999
Externally publishedYes
EventProceedings of the 1999 Optical Engineering for Sensing and Nanotechnology (ICOSN '99) - Yokohama, Japan
Duration: 16 Jun 199918 Jun 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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