Simultaneous Refractive Index and Temperature Measurement Based on Mach-Zehnder Interferometer Concatenating Two Bi-Tapers and a Long-Period Grating

Simultaneous Refractive Index and Temperature Measurement Based on Mach-Zehnder Interferometer Concatenating Two Bi-Tapers and a Long-Period Grating

An all-fiber sensor for simultaneous refractive index (RI) and temperature measurement based on Mach-Zehnder interferometer (MZI) is proposed and demonstrated experimentally. The MZI consists of two bi-tapers and a long-period grating. Two dips in the interference spectrum exhibit different response...

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Veröffentlicht in:IEEE sensors journal 2016-06, Vol.16 (11), p.4295-4299
Hauptverfasser: Xiong, Mengling, Gong, Huaping, Wang, Zhiping, Zhao, Chun-Liu, Dong, Xinyong
Format: Artikel
Sprache:eng
Schlagworte:
bi-taper
Diffraction gratings
Dipping
Gratings (spectra)
Mach-Zehnder interferometer
Mach-Zehnder interferometers
Mechanical sensors
Optical fiber sensors
Refractive index
Refractivity
sensitive coefficient matrix
Sensitivity
Sensors
Simultaneous measurement
Temperature measurement
Temperature sensors
Yttrium
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Beschreibung
Zusammenfassung:An all-fiber sensor for simultaneous refractive index (RI) and temperature measurement based on Mach-Zehnder interferometer (MZI) is proposed and demonstrated experimentally. The MZI consists of two bi-tapers and a long-period grating. Two dips in the interference spectrum exhibit different responses to the variations of RI and temperature, and simultaneous measurement of RI and temperature can be realized by means of sensitivity coefficient matrix. Experimental results show that the RI and temperature sensitivity for the proposed sensor are -108.16 nm/RI and 0.12 nm/°C, respectively.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2016.2521383