基于侧边抛磨传感臂结构的光纤Mach-Zehnder温度传感特性研究
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摘要
提出并设计了基于侧边抛磨传感臂结构的光纤Mach-Zehnder干涉结构,并对其温度传感特性进行了研究。通过将两支分光比为50∶50的1×2端口光纤耦合器相对熔接,构建光纤Mach-Zehnder干涉结构,采用单模光纤作为干涉结构的参考臂。基于侧面研磨技术在3m长纤芯/包层尺寸为9/125μm的单模光纤上进行抛光,抛光时长为5h,制备了研磨长度为20mm、深度为50μm的光泄露窗作为干涉结构的传感臂,提高传感器的灵敏度。采用宽带光源对Mach-Zehnder干涉结构的透射光谱进行测试,干涉周期为0.66nm。实验中对传感结构进行了温度测试及分析,选取波谷位置为1551.48nm作为测试点。在25～60℃的升温范围内干涉条纹向长波方向移动3.97nm,传感器的温度灵敏度为115.4pm/℃。不同温度下对应波谷的波长位移量与外界温度呈现良好的线性关系,线性度为0.9940,功率漂移小于1.66dB,具有较好的功率稳定性。
The fiber Mach-Zehnder interference structure based on the side polishing sensor arm structure was proposed, and its temperature sensing characteristics was studied. By fusing two 1×2 port fiber couplers with spectral ratio being 50∶50, the interference structure was constructed, and the single mode fiber was used as the reference arm. Based on the side polishing technology, the single mode fiber with 3 m long core/cladding size of 9/125μm was polished for 5 hours, and the optical leakage window with polishing length of 20 mm and depth of 50μm was prepared as the sensing arm of the interference structure to improve the sensitivity of the sensor. The interference structure was tested with abroadband light source,and the interference period was 0.66 nm.The experiment of the temperature sensing structure was carried out and the tested valley was chosen at 1551.48 nm when hearting from 25～60℃,the interference fringes moved towards long wave by 3.97 nm and the temperature sensitivity is 115.4 pm/℃.The linearity is 0.9940,the power drift is smaller than 1.66 dB,which had a good power stability.
The fiber Mach-Zehnder interference structure based on the side polishing sensor arm structure was proposed, and its temperature sensing characteristics was studied. By fusing two 1×2 port fiber couplers with spectral ratio being 50∶50, the interference structure was constructed, and the single mode fiber was used as the reference arm. Based on the side polishing technology, the single mode fiber with 3 m long core/cladding size of 9/125μm was polished for 5 hours, and the optical leakage window with polishing length of 20 mm and depth of 50μm was prepared as the sensing arm of the interference structure to improve the sensitivity of the sensor. The interference structure was tested with abroadband light source,and the interference period was 0.66 nm.The experiment of the temperature sensing structure was carried out and the tested valley was chosen at 1551.48 nm when hearting from 25～60℃,the interference fringes moved towards long wave by 3.97 nm and the temperature sensitivity is 115.4 pm/℃.The linearity is 0.9940,the power drift is smaller than 1.66 dB,which had a good power stability.
引文
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[14] Shangguan C,Zhang W,Hei W,et al.Fabry-Perot cavity cascaded Sagnac loops for temperature and strain measurements[J].Optical Engineering,2018,57(4):1.
[2] 高红春,江毅,李宝娟,等.高温光子晶体光纤温度传感器[J].光学技术,2017,43(6):538—541.Gao Hongchun,Jiang Yi,Li Baojuan,et al.High temperature photonic crystal fiber temperature sensor[J].Optical Technology,2017,43(6):538—541.
[3] 黄俊,段刘蕊,景霞,等.带温度补偿的分布式光纤温度传感系统设计[J].光学技术,2017,43(2):176—179.Huang Jun,Duan Liurui,Jing Xia,et al.Design of distributed optical fiber temperature sensing system with temperature compensation [J].Optical Technology,2017,43(2):176—179.
[4] 李善田,朱咏梅.基于马赫-增德尔干涉仪的光纤周界防范装置设计[J].工业控制计算机,2009,22(8):36—38.Li Shantian,Zhu Yongmei.Design of optical fiber perimeter protection device based on Mach-Zehnder interferometer[J].Industrial Control Computer,2009,22(8):36—38.
[5] 白春河,罗云瀚,陈哲,等.基于侧边抛磨光纤倏逝场的折射率传感特性[J].光子学报,2013,42(10):1182—1184.Bai Chunhe,Luo Yunhan,Chen Zhe,et al.Characteristics of side-polished fiber in refractive index sensing [J].Acta Photonica Sinica,2013,42(10):1182—1184.
[6] 甘宏波,陈哲,张军,等.侧边抛磨多模光纤中光功率传输特性研究[J].光电子·激光,2014,25(3):447—453.Gan Hongbo,Chen Zhe,Zhang Jun,et al.Investigations of optical power transmitting characteristics in side-polished multimode fiber[J].Journal of Optoelectronics Laser,2014,25(3):447—453.
[7] 卞继城,郎婷婷,俞文杰,等.基于马赫-曾德尔干涉的温度和应变同时测量的光纤传感器研究[J].光电子·激光,2015,26(11):2169—2174.Bian Jicheng,Lang Tingting,Yu Wenjie,et al.Study of optical fiber sensor based on simultaneous measurement of temperature and strain by Mach-Zehnder interference[J].Photoelectron laser,2015,26(11):2169—2174.
[8] 李辉栋,傅海威,邵敏,等.基于多模-细芯-多模光纤结构的Mach-Zehnder干涉仪的温度传感实验研究[J].大学物理实验,2016,30(4):1—6.Li Huidong,Fu Haiwei,Shao Min,et al.Temperature sensing experimental study of Mach-Zehnder interferometer based on multi-mode-core-multimode fiber structure [J].University physics Experiment,2016,30(4):1—6.
[9] Li Y,Chen L,Harris E,et al.Refractive index and temperature sensor based on double-pass in-line Mach-Zehnder interferometer[J].Proceedings of SPIE-The International Society for Optical Engineering,2011.
[10] 郑亚如,邹辉,赵瑞,等.基于腰椎扩径熔接马赫-曾德尔干涉仪的温度光纤传感器[J].光电子·激光,2017,28(12):1285—1289.Zheng Yaru,Zou hui,Zhao Rui,et al.Temperature fiber sensor based on lumbar enlargement and fusion of Mach-Zehnder interferometer [J].Optoelectronics·laser,2017,28(12):1285—1289.
[11] 冯爱明,帅少杰,孙志强,等.基于细芯光纤马赫-曾德干涉和曲率修正模型的高灵敏度光纤曲率传感器[J].光电子·激光,2018,16(7):691—697.Feng Aiming,Shuai Shaojie,Sun Zhiqiang,et al.High sensitivity fiber curvature sensor based on fine-core fiber Mach-Zehnder interference and curvature correction model[J].Photoelectron·laser,2018,16(7):691—697.
[12] 沈涛,孙滨超,冯月.马赫-曾德尔干涉集成化的全光纤磁场与温度传感器[J].光学精密工程,2018,26(6):1338—1345.Shen Tao,Sun Binchao,Feng Yue.Mach-Zehnder interference integrated all optical magnetic field and temperature sensor[J].Optical Precision Engineering,2018,26(6):1338—1345.
[13] Tong Z,Wang X,Zhang W,et al.Research on dual-parameter optical fiber sensor based on thin-core fiber and spherical structure[J].Laser Physics,2018,28(4):2.
[14] Shangguan C,Zhang W,Hei W,et al.Fabry-Perot cavity cascaded Sagnac loops for temperature and strain measurements[J].Optical Engineering,2018,57(4):1.