Application of MZI Symmetrical Structure With Fiber Balls and Seven-Core Fiber in Microdisplacement Measurement

Liming Zhao, Hong Li, Yanming Song, Mingli Dong, Lianqing Zhu
2018 Photonic Sensors  
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/ and 89.72pm/ ℃ ℃ , respectively. The microdisplacement sensitivities are
more » ... 017.71 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.
doi:10.1007/s13320-018-0518-5 fatcat:ytwtb4xvczcv5egro6x56rim74