Journal
PHOTONIC SENSORS
Volume 9, Issue 2, Pages 97-107Publisher
SPRINGEROPEN
DOI: 10.1007/s13320-018-0518-5
Keywords
Microdisplacement; Mach-Zehnder interferometer; fiber ball; symmetrical structure; seven-core fiber
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Funding
- Program for Changjiang Scholars and Innovative Research Team in University [IRT_16R07]
- Importation and Development of High-Caliber Talents Project of Beijing Municipal Institutions [IDHT20170510]
- 111 Project [D17021]
- Research Project of Beijing Education Committee
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An optical fiber microdisplacement sensor based on symmetric Mach-Zehnder interferometer (MZI) with a seven-core fiber and two single-mode fiber balls is proposed. The rationality and manufacturing process of the MZI sensing structure are analyzed. The fabrication mechanism of the Mach-Zehnder sensor by CO2 laser is described in detail. Experimental results show that temperature sensitivities of the two dips are 98.65 pm/degrees C and 89.72 pm/degrees C, respectively. The microdisplacement sensitivities are 2017.71 pm/mm and 2457.92 pm/mm, respectively. The simultaneous measurement of temperature and microdisplacement is demonstrated based on the sensitive matrix. The proposed Mach-Zehnder interference sensor exhibits the advantages of compact structure, simple manufacturing process, and high reliability.
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