Mach-Zehnder Interferometer Based on a Sandwich Fiber Structure for Refractive Index Measurement

Mach-Zehnder Interferometer Based on a Sandwich Fiber Structure for Refractive Index Measurement

A novel refractive-index (RI) sensor based on Mach-Zehnder interferometer composed of an uncoated single-mode fiber section sandwiched between two short sections of multimode fiber is proposed and experimentally demonstrated. A clear interference spectrum is obtained and the dip wavelength shifts as...

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Veröffentlicht in:IEEE sensors journal 2012-06, Vol.12 (6), p.2081-2085
Hauptverfasser: Ma, Yue, Qiao, Xueguang, Guo, Tuan, Wang, Ruohui, Zhang, Jing, Weng, Yinyan, Rong, Qiangzhou, Hu, Manli, Feng, Zhongyao
Format: Artikel
Sprache:eng
Schlagworte:
Dipping
Fiber-optic sensor
Fibers
Indexes
Interference
Mach-Zehnder interferometer
Mach-Zehnder interferometers
Optical fiber sensors
Refractive index
refractive-index measurement
Refractivity
sandwich fiber structure
Sensitivity
Sensors
Wavelengths
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Beschreibung
Zusammenfassung:A novel refractive-index (RI) sensor based on Mach-Zehnder interferometer composed of an uncoated single-mode fiber section sandwiched between two short sections of multimode fiber is proposed and experimentally demonstrated. A clear interference spectrum is obtained and the dip wavelength shifts as a function of surrounding RI. An estimated resolution of 7.1 × 10 -5 within the linear sensing range from 1.33 to 1.40 and a maximum up to 6.4 × 10 -6 at indexes around 1.44 have been achieved for the cost-effective RI measurement.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2012.2184751