A practical temperature sensor with high sensitivity utilizing a fiber loop mirror with a long-period grating in a photonic crystal fiber

Yunpeng Wang, Chun Liu Zhao, Jiarong Zhao, Xinyong Dong, Wei Jin

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A practical sensor with high sensitivity for the temperature measurement by using a highly birefringent (HiBi) fiber loop mirror (FLM) concatenated with a long-period grating (LPG) written in a photonic crystal fiber (PCF) is proposed. Only HiBi-FLM acts as a sensor head, while the PCF-LPG serves as a temperature insensitive filter to provide wavelength dependent optical power transmission. A bandpass filter is used to provide a narrow band light source, thus only one of transmission peaks of the HiBi-FLM is located within a negative linear region of the LPG's transmission spectrum. By utilizing the stable filtering function of the PCF-LPG, the resonant wavelength variation of the FLM with temperature is transferred effectively to the intensity variation of the output light. The temperature applied on the FLM is deduced by a cheap optical power. As a result, the sensitivity of the sensor is about -0.4872 dB/°C. When an optical power meter with the resolution of 0.01 dB, a temperature resolution of 0.02°C is achieved.
Original languageEnglish
Title of host publicationEarth and Space 2010
Subtitle of host publicationEngineering, Science, Construction, and Operations in Challenging Environments - Proceedings of the 12th International Conference
Pages1546-1550
Number of pages5
DOIs
Publication statusPublished - 29 Nov 2010
Event12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010 - Honolulu, HI, United States
Duration: 14 Mar 201017 Mar 2010

Conference

Conference12th International Conference on Engineering, Science, Construction, and Operations in Challenging Environments - Earth and Space 2010
CountryUnited States
CityHonolulu, HI
Period14/03/1017/03/10

Keywords

  • Fibers
  • Mirrors
  • Probe instruments
  • Temperature effects

ASJC Scopus subject areas

  • Building and Construction
  • Environmental Engineering

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