Temperature and strain discrimination based on a temperature-insensitive birefringent interferometer incorporating an erbium-doped fiber
- Temperature and strain discrimination based on a temperature-insensitive birefringent interferometer incorporating an erbium-doped fiber
- 한영근; 정영주; 이상배; 김창석; 정명영; 김문기
- tempature sensor; strain sensor; erbium doped fiber; Polarization maintaining
- Issue Date
- Applied optics
- VOL 48, NO 12, 2303-2307
- A simple configuration for simultaneous measurement of temperature and strain exploiting a temperature-
insensitive birefringent interferometer based on a photonic crystal fiber incorporating an erbiumdoped
fiber (EDF) is investigated. The transmission peak power of the birefringent interferometer
incorporating the EDF is changed by the temperature variation because the amplified spontaneous emission
of the EDF strongly depends on temperature. The applied strain changes the peak wavelength of the
birefringent interferometer connecting with the EDF, which can make it possible to discriminate concurrent
sensitivities like temperature and strain. The temperature and strain sensitivities were
−0:04 dB=°C and 1:3pm=με, respectively.
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