期刊
IEEE SENSORS JOURNAL
卷 11, 期 10, 页码 2395-2400出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2011.2123885
关键词
Cladding-mode resonance; in-fiber Mach-Zehnder interferometer; refractive index sensor
资金
- Natural Science Foundation of China [60807031]
- Shanghai Rising-Star Program [10QA1402600]
- Shanghai Leading Academic Discipline Project and STCSM [S30108]
- Shanghai Municipal Education Commission [10YZ12]
An in-fiber Mach-Zehnder interferometer (MZI) was fabricated and characterized for solution refractive index (RI) sensors. The MZI consists of two cascade double cladding fibers (DCFs) in a standard single mode fiber (SMF). The DCFs serve as the in-fiber couplers which split and combine light propagating in the core and the outer cladding region. Since the cladding mode is excited, the interference spectrum is sensitive to the ambient RI variation. Within the RI range from 1.3333 to 1.4535, the sensor characteristics were characterized. The sensitivity of 31 nm/RIU and 823 nm/RIU were obtained for the lower RI (1.34) and the higher RI (1.44), respectively. With the mass-producing of DCF and the easy fabrication process of the sensor head, the proposed in-fiber MZI is a potential alternative for the RI sensor application.
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