• Chinese Journal of Lasers
  • Vol. 39, Issue 11, 1114002 (2012)
Wu Tiesheng1、2、*, Wang Li1, Wang Zhe1, Liu Yumin2, Hu Shuyang1, and Yin Lidan1
Author Affiliations
  • 1[in Chinese]
  • 2[in Chinese]
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    DOI: 10.3788/cjl201239.1114002 Cite this Article Set citation alerts
    Wu Tiesheng, Wang Li, Wang Zhe, Liu Yumin, Hu Shuyang, Yin Lidan. A Photonic Crystal Fiber Temperature Sensor Based on Sagnac Interferometer Structure[J]. Chinese Journal of Lasers, 2012, 39(11): 1114002 Copy Citation Text show less

    Abstract

    A highly birefringent photonic crystal fiber loop mirror temperature sensor based on Sagnac interferometer structure is designed. As the photonic crystal fiber has good temperature stability, in order to achieve the temperature sensing, ethanol which has a high thermal coefficient is filled into the air holes of the high birefringence photonic crystal fiber. Using plane wave expansion method, the relationship between birefringence of the highly birefringent photonic crystal fiber and transmission wavelength, and that between birefringence and temperature are analyzed. Theoretical analysis shows that: filled with ethanol, the birefringence of high birefringence photonic crystal fiber increases with the increase of the transmission wavelength and temperature, besides, there is a linear relationship between birefringence and temperature. In the experiment, a piece of high birefringence photonic crystal fiber filled with ethanol is welded with a 3 dB coupler to form a fiber loop mirror. When the temperature rises from 45 ℃ to 80 ℃, the concave point drift of 309.280 nm towards the short wavelength is observed on spectrum analyzer. The sensitivity is as high as 8.837 nm/℃.
    Wu Tiesheng, Wang Li, Wang Zhe, Liu Yumin, Hu Shuyang, Yin Lidan. A Photonic Crystal Fiber Temperature Sensor Based on Sagnac Interferometer Structure[J]. Chinese Journal of Lasers, 2012, 39(11): 1114002
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