Journal
IEEE SENSORS JOURNAL
Volume 13, Issue 6, Pages 2061-2065Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2013.2237898
Keywords
Birefringence; interferometer; optical fiber sensor
Funding
- National Natural Science Foundation of China [60727004, 61077060, 61205080]
- National High Technology Research and Development Program 863 [2009AA06Z203]
- Fundamental Research Funds for the Central Universities of China [11611601]
- Guangdong Natural Science Foundation of China [S2011010001631, S2012010008385]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20114401120006]
- Pearl River Scholar for Distinguished Young Scientist [33111012]
- Northwest University Postgraduate Innovative Talents Training [YZZ12084, YZZ12085]
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A new configuration of Michelson fiber interferometer is proposed and demonstrated for refractive index (RI) and temperature sensing. The proposed configuration consists of a 2 x 2 3dB coupler and a section of high birefringence (Hi-Bi) fiber. The Hi-Bi fiber is spliced to an output of the coupler, and its combining with the other output forms and the interference arms of the interferometer. For the spectral response of the proposed interferometer, the extinction ratio of an interference pattern corresponding to conventional Michelson fiber interferometer is modulated by a larger period induced by Birefringence in Hi-Bi fiber. This sensor shows a capacity for simultaneous measurement of liquid RI and temperature by detecting the fringe contrast variation and the wavelength shift, respectively.
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