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基于多模干涉的在线型光纤迈克耳孙干涉仪的传感特性

Sensing Characteristics of In-Fiber Michelson Interferometer Based on Multimode Interference

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摘要

提出并制作了一种基于多模干涉的在线型光纤迈克耳孙干涉仪,干涉仪由多模光纤熔接单模光纤构成。光从单模光纤进入多模光纤时,由于纤芯失配会激发出多个高阶模,这些高阶模与纤芯基模在多模光纤中耦合并发生模间干涉。制作的传感器样品的干涉谱条纹清晰,对比度高。液体折射率传感和温度响应特性实验结果表明在1.3333~1.3796 RIU的折射率范围内,干涉仪的液体折射率灵敏度为-92.43 dB/RIU;在25~75 ℃的水温范围内,干涉仪的液体温度灵敏度为0.01 dB/℃。传感器结构简单,易于制作,成本低廉,其探针式结构在生物医学、石油化工等领域有一定的应用前景。

Abstract

An in-fiber Michelson interferometer based on multimode interference is proposed and fabricated. The proposed interferometer comprises a section of multimode fiber (MMF) fusion-spliced with single mode fiber (SMF). When light enters the MMF from the SMF, multiple high-order modes are excited by core mismatching. These high-order modes and core mode propagate in the MMF and couple with each other to form intermodal interference. The interference fringes of the proposed sensor samples are clear with high contrast. Liquid refractive index (RI) sensing and temperature measurement experiments demonstrate that a liquid refractive index sensitivity of -92.43 dB/RIU is achieved for the liquid RI range from 1.3333 to 1.3796 RIU, and a temperature sensitivity of 0.01 dB/℃ is obtained for a water temperature range of 25-75 ℃. The proposed sensor is easy to fabricate and cost-effective. The probe structure of the proposed sensor has promising applications in biomedical and petrochemical fields.

Newport宣传-MKS新实验室计划
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DOI:10.3788/LOP56.170628

所属栏目:功能光纤

基金项目:国家自然科学基金、西安石油大学研究生创新与实践能力培养项目;

收稿日期:2019-05-05

修改稿日期:2016-06-26

网络出版日期:2019-09-01

作者单位    点击查看

韩亮:西安石油大学理学院, 陕西 西安 710065
邵敏:西安石油大学理学院, 陕西 西安 710065
孙浩男:西安石油大学理学院, 陕西 西安 710065
傅海威:西安石油大学理学院, 陕西 西安 710065
乔学光:西北大学物理学院, 陕西 西安 710069

联系人作者:邵敏(shaomin@xsyu.edu.cn)

备注:国家自然科学基金、西安石油大学研究生创新与实践能力培养项目;

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引用该论文

Liang Han, Min Shao, Haonan Sun, Haiwei Fu, Xueguang Qiao. Sensing Characteristics of In-Fiber Michelson Interferometer Based on Multimode Interference[J]. Laser & Optoelectronics Progress, 2019, 56(17): 170628

韩亮, 邵敏, 孙浩男, 傅海威, 乔学光. 基于多模干涉的在线型光纤迈克耳孙干涉仪的传感特性[J]. 激光与光电子学进展, 2019, 56(17): 170628

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