Non-destructive and distributed measurement of optical fiber diameter with nanometer resolution based on coherent forward stimulated Brillouin scattering
作者机构：National Key Laboratory of Science and Technology on Tunable LaserHarbin Institute of Technology150001 HarbinChina Postdoctoral Research Station for Optical EngineeringSchool of AstronauticsHarbin Institute of TechnologyHarbin 150001China Research Center for Space Optical EngineeringSchool of AstronauticsHarbin Institute of TechnologyHarbin 150001China Fiber Optics GroupDepartment of PhysicsUniversity of OttawaOttawaK1N 6N5Canada
出 版 物：《Light(Advanced Manufacturing)》 (光（先进制造）（英文）)
年 卷 期：2021年第2卷第4期
页 面：1-12页
学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程]
基 金：This work was supported by the National Key Scientific Instrument and Equipment Development Project of China(2017YFF0108700) National Natural Science Foundation of China(62005067) National Postdoctoral Program for Innovative Talents(BX20200104) China Postdoctoral Science Foundation(2020M681088) the Heilongjiang Postdoctoral Fund to pursue scientific research(LBH-Z20067)
主 题：fiber scattering resolution
摘 要：Precise control and measurement of the optical fiber diameter are vital for a range of fields,such as ultra-high sensitivity sensing and high-speed optical ***,the measurement of fiber diameter relies on point measurement schemes such as microscopes,which suffer from a tradeoff between the resolution and field of *** the fiber can irreversibly damage the fiber samples,especially when multi-point measurements are *** overcome these problems,we have explored a novel technique in which the mechanical properties of fibers are reflected by forward stimulated Brillouin scattering(FSBS),from which the diameters can be demodulated via the acoustic dispersion *** distributed FSBS spectra with narrow linewidths were recorded via the optimized optomechanical time-domain analysis system using coherent FSBS,thereby achieving a spatial resolution of 1 m over a fiber length of tens of *** successfully obtained the diameter distribution of unjacketed test fibers with diameters of 125μm and 80μ*** diameter accuracy was verified by high-quality scanning electron microscope *** achieved a diameter resolution of 3.9 nm,virtually independent of the diameter *** the best of our knowledge,this is the first demonstration of non-destructive and distributed fiber diameter monitoring with nanometer resolution.
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