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

• 来源期刊: 光子传感器（英文版）
• 关键词: Microdisplacement Mach-Zehnder interferometer fiber ball symmetrical structure seven-core fiber
• 年，卷（期）: 2019,（2）
• 页码范围: 97-107
• 页数: 11页
• 语种: 英文
• DOI: 10.1007/s13320-018-0518-5

摘要

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 98.65prn/℃ and 89.72pm/℃,respectively.The microdisplacement sensitivities are 2017.71 pm/mm and 2457.92pm/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.