A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter

Xiao，Dongrui1; Yu，Feihong2; Wang，Guoqing2; Shao，Liyang2; Wang，Chao3; Hu，Jie2

10.1117/12.2618000

2022

7th Asia Pacific Conference on Optics Manufacture (APCOM)

0277-786X

1996-756X

978-1-5106-5208-8

Proceedings of SPIE - The International Society for Optical Engineering

12166

OCT 28-31, 2021

null,Shanghai,PEOPLES R CHINA

1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA

SPIE-INT SOC OPTICAL ENGINEERING

Curvature measurement is important in the fields of structure health monitoring, robot-pose measurement, etc. The curvature-sensor with high resolution is highly needed. In this paper, an optical curvature sensor with high resolution based on single-mode-multimode-single-mode (SMS) structure using ring core fiber (RCF) is proposed and its demodulation is realized by the microwave photonic filter (MPF). The SMS fiber structure is a typical in-fiber Mach-Zehnder interferometer (MZI). The operating principle of the proposed sensor is that different curvatures will cause the variations of the interference spectrum of the SMS-sensor, and then the variations are converted into the frequency-shift of the MPF. Theoretical analysis and experiment are verified. The measured sensitivity is-147.634 MHz/m-1, and the resolution is 6.774 × 10-6m-1 which is the highest value up to now.

Curvature sensor Mach-Zehnder interferometer Microwave photonic filter SMS fiber structure

通讯

英语

CPCI-S ; EI

Engineering ; Optics

Engineering, Manufacturing ; Optics

WOS:000799210000264

20220911734391

Demodulation ; Fiber Bragg gratings ; Fiber optic sensors ; Microwave filters ; Microwave sensors ; Multimode fibers ; Optical variables measurement ; 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 ; Optical Variables Measurements:941.4

2-s2.0-85125448038

Scopus

1.Harbin Institute of Technology,Harbin,150001,China
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.School of Engineering,University of Kent,Canterbury,United Kingdom

Xiao，Dongrui,Yu，Feihong,Wang，Guoqing,et al. A new curvature sensor based on SMS fiber structure using ring-core fiber and its demodulation by microwave photonic filter[C]. 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA:SPIE-INT SOC OPTICAL ENGINEERING,2022.