光子学报, 2016, 45 (2): 0206005, 网络出版: 2016-04-01
多芯光纤及其在弯曲传感中的应用
Multicore Fiber and Its Application for Bending Sensor
光纤应用 光纤弯曲传感器 模式耦合 多芯光纤 弯曲传感 Fiber optic applications Fiber bending sensor Mode couping Multi-core optical fiber
摘要
采用纤芯间距为38.78 μm的国产多芯光纤设计了一种光纤弯曲传感器.该多芯光纤弯曲传感器由长度为1 m的七芯光纤与单模光纤拼接制成,多芯光纤弯曲时,相邻的纤芯发生模式耦合.在传感器一侧,将宽带光注入到位于多芯光纤中心的纤芯,用光谱分析仪测量带有曲率信息的频谱,获得弯曲传感器的透射谱波长偏移与弯曲曲率半径的关系.结果表明:多芯光纤弯曲半径越小,弯曲曲率越大,串扰越明显.
Abstract
A fiber bending sensor was proposed based on a homemade multicore optical fiber with seven inner cores where the distance between adjacent cores is about 38.78μm. For a section of bending multicore fiber, mode coupling happens between adjacent cores,which provides a method to achieve bending sensing by measuring the transmission spectrum of the bending multicore fiber. The multicore fiberbased bending sensor is fabricated by splicing a sevencore fiber with a length of approximate 1 m to single mode fibers. When a broadband light is injected into the central core of the multicore fiber on one side, the transmission spectrum with the information of bending curvature can be measured by an optical spectrum analyzer. The relationship between the wavelength shift of the transmission spectrum and the bending radius of the multicore fiberbased bending sensor shows that the output spectrum of multicore fiber under bending condition has much more obvious crosstalk phenomenon along with the bending curvature of multicore fiber increasing.
骆淑君, 王晓亮, 陈达如, 冯高峰, 杨军勇. 多芯光纤及其在弯曲传感中的应用[J]. 光子学报, 2016, 45(2): 0206005. LUO Shujun, WANG Xiaoliang, CHEN Daru, FENG Gaofeng, YANG Junyong. Multicore Fiber and Its Application for Bending Sensor[J]. ACTA PHOTONICA SINICA, 2016, 45(2): 0206005.