A new Mach-Zehnder interferometer in a thinned-cladding fiber fabricated by electric arc for high sensitivity refractive index sensing

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• 作者：Benye Li ; Lan Jiang ; ^{jianglan@bit.edu.cn} ; Sumei Wang ; Qianghua Chen Mengmeng Wang ; Jinpeng Yang
• 关键词：Mach-Zehnder interferometer ; Electric-arc technique ; Refractive index sensor
• 刊名：Optics and Lasers in Engineering
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：50
• 期：6
• 页码：829-832
• 全文大小：468 K

文摘

This study proposes an inline electric-arc induced Mach-Zehnder interferometer (MZI) in a thinned cladding fiber. The proposed MZI is used for refractive index (RI) sensing. At the diameter of 56 ¦Ìm and the length of 18 mm, in the RI of 1.3348-1.3558, the sensitivity is ?80 nm/RIU, that is about 20 times greater than those of taper-based MZI sensors. Temperature characteristics of the MZI are investigated in 50-800 ¡ãC. It is demonstrated that the proposed MZI is a good choice for high-temperature harsh environment sensing.