A fiber ring cavity laser sensor for refractive index and temperature measurement with core-offset modal interferometer as tunable filter

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• 作者：Lu Cai^aAuthor Vitae ; Yong Zhao^a ; ^b ; ^{zhaoyong@ise.neu.edu.cn} ; ^{zhaoyong@tsinghua.org.cn}Author Vitae ; Xue-gang Li^aAuthor Vitae
• 关键词：EDF ring cavity laser ; Core-offset joints ; MZ interferometer ; Temperature measurement ; RI measurement
• 刊名：Sensors and Actuators B: Chemical
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：242
• 期：Complete
• 页码：673-678
• 全文大小：1193 K
• 卷排序：242

文摘

A fiber ring cavity laser refractive index (RI) and temperature sensor is presented. A core-offset Mach-Zehnder interferometer is utilized as a sensing element as well as a filter. The Erbium doped fiber ring cavity laser setup is helpful to improve the spectral quality factor Q and the detection limit. The calculated detection limits of 0.35 °C and 4.54 × 10−4 for temperature and RI measurement are 10 times higher than the individual MZ interferometer.