Optical curvature sensor with high resolution based on in-line fiber Mach-Zehnder interferometer and microwave photonic filter

Xiao, Dongrui1,2; Wang, Guoqing1; Yu, Feihong1; Liu, Shuaiqi1; Xu, Weijie1; Shao, Liyang1,3; Wang, Chao4; Fu, Hongyan5; Fu, Songnian6; Shum, Perry Ping1; Ye, Tao1; Song, Zhangqi1; Wang, Weizhi3

2022-02-14

10.1364/OE.445982

OPTICS EXPRESS   影响因子和分区

1094-4087

Curvature measurement plays an important role in structural health monitoring, robot-pose measuring, etc. High-resolution curvature measurement is highly demanded. In this paper, an optical curvature sensor with high resolution based on in-fiber Mach-Zehnder interferometer (MZI) and microwave photonic filter (MPF) is proposed and experimentally demonstrated. The in-fiber MZI is constructed with a ring-core fiber (RCF) which is fusion spliced between two coreless fibers (CLFs). The structure of CLF-RCF-CLF is then sandwiched between two segments of single-mode fiber (SMF), making the whole interferometer structure of SMF-CLF-RCF-CLF-SMF. The operating principle is that different curvatures will cause the variations of the interference spectrum of MZI due to elastic-optic effect, and then the variations are converted into the frequency-shift of the MPF. The factors affecting the visibility of the interference spectrum are researched. A preliminary exploration of the multiplexing demodulation for the in-fiber-MZIs is also investigated and discussed, which is for the first time to the best of our knowledge, holding great potential to pave the way for constructing the sensing network composed of interferometric sensors. The curvature measurement sensitivity is -147.634 MHz/m(-1), and the resolution is 6.774 x 10(-6) m(-1) which is the highest value up to now. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

SCI ; EI

英语

第一 ; 通讯

Future Greater-Bay Area Network Facilities for Large-scale Experiments and Applications[LZC0019] ; The Verification Platform of Multi-tier Coverage Communication Network for Oceans[LZC0020] ; Guangdong Department of Science and Technology[2021A0505080002] ; Shenzhen Science, Technology & Innovation Commission[20200925162216001] ; Guangdong Department of Education[2021ZDZX1023]

Optics

Optics

WOS:000754931700062

OPTICAL SOC AMER

20220711619674

Mach-Zehnder interferometers ; Microwave filters ; Microwave sensors ; Structural health monitoring

Strength of Building Materials; Test Equipment and Methods:422 ; Electric Filters:703.2 ; Control Instrumentation:732.2 ; Fiber Optics:741.1.2 ; Optical Devices and Systems:741.3 ; Optical Instruments:941.3

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen 518055, Peoples R China
2.Hunan Inst Technol, Sch Elect Informat Engn, Hengyang 421002, Peoples R China
3.Peng Cheng Lab, Shenzhen 518055, Guangdong, Peoples R China
4.Univ Kent, Sch Engn, Canterbury, Kent, England
5.Xiamen Univ, Natl Model Microelect Coll, Sch Elect Sci & Engn, Dept Elect Engn, Xiamen 361005, Peoples R China
6.Guangdong Univ Technol, Sch Informat Engn, Guangzhou 51006, Peoples R China

Xiao, Dongrui,Wang, Guoqing,Yu, Feihong,et al. Optical curvature sensor with high resolution based on in-line fiber Mach-Zehnder interferometer and microwave photonic filter[J]. OPTICS EXPRESS,2022,30(4):5402-5413.

Xiao, Dongrui.,Wang, Guoqing.,Yu, Feihong.,Liu, Shuaiqi.,Xu, Weijie.,...&Wang, Weizhi.(2022).Optical curvature sensor with high resolution based on in-line fiber Mach-Zehnder interferometer and microwave photonic filter.OPTICS EXPRESS,30(4),5402-5413.

Xiao, Dongrui,et al."Optical curvature sensor with high resolution based on in-line fiber Mach-Zehnder interferometer and microwave photonic filter".OPTICS EXPRESS 30.4(2022):5402-5413.