Michelson interferometer-based fiber-optic sensing of liquid refractive index

A fiber-optic sensor for liquid refractive index measurement based on a Michelson interferometer is described. The interferometer is achieved between the Fresnel reflections from the fiber ends of the coupler. The fiber ends are then in contact with the solvent and solution samples to provide refere...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2011-12, Vol.160 (1), p.720-723
Main Authors: Meng, Hongyun, Shen, Wei, Zhang, Guanbin, Wu, Xiaowei, Wang, Wei, Tan, Chunhua, Huang, Xuguang
Format: Article
Language:English
Subjects:
Detection
Fiber optics
Fiber sensor
Fibers
Fresnel reflection
Liquids
Michelson interferometer
Optical fibers
Refractive index
Refractivity
Sensors
solvents
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Summary:A fiber-optic sensor for liquid refractive index measurement based on a Michelson interferometer is described. The interferometer is achieved between the Fresnel reflections from the fiber ends of the coupler. The fiber ends are then in contact with the solvent and solution samples to provide reference and refractive index measurement, respectively. The refractive index of the solution is determined according to the fringe contrast of the interference fringes in the reflective spectrum of the sensor. Its ease of fabrication and low-cost offer the attractive applications in chemical and biological sensing.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2011.08.054