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Non-destructive and distributed measurement of optical fiber diameter with nanometer resolution based on coherent forward stimulated Brillouin scattering 被引量:3
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作者 zijie hua Dexin Ba +4 位作者 Dengwang Zhou Yijia Li Yue Wang Xiaoyi Bao Yongkang Dong 《Light(Advanced Manufacturing)》 2021年第4期1-12,共12页
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 communication.Nowadays,the measurement of fiber diameter reli... 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 communication.Nowadays,the measurement of fiber diameter relies on point measurement schemes such as microscopes,which suffer from a tradeoff between the resolution and field of view.Handling the fiber can irreversibly damage the fiber samples,especially when multi-point measurements are required.To 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 relation.The 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 meters.We successfully obtained the diameter distribution of unjacketed test fibers with diameters of 125μm and 80μm.The diameter accuracy was verified by high-quality scanning electron microscope images.We achieved a diameter resolution of 3.9 nm,virtually independent of the diameter range.To the best of our knowledge,this is the first demonstration of non-destructive and distributed fiber diameter monitoring with nanometer resolution. 展开更多
关键词 fiber SCATTERING resolution
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