基于多芯少模光纤位移传感器的研究  

Study of Displacement Sensor Based on Few-Mode Multi-Core Fiber

作　　者：张玉龙[1] 贾大功[1] 李帅[1] 吉喆[1] 张红霞[1] 刘铁根[1] 张以谟[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室微光机电系统技术教育部重点实验室,天津300072

出　　处：《中国激光》2014年第9期147-150,共4页Chinese Journal of Lasers

基　　金：国家自然科学基金(61377077);国家973计划(2014CB340103);天津市科技支撑重点项目(11ZCKFSF00400)

摘　　要：提出一种基于新型多芯少模光纤模式干涉原理的位移传感器,该传感器由两段单模光纤和一段多芯少模光纤组成。研究了该传感器的实现原理,并实验验证。实验结果表明当光纤轴向被拉伸0~60μm时,该新型传感器的检测灵敏度为-61.17pm/μm,与理论计算结果之间的误差小于3.9%。因此,当使用高分辨率光谱仪作为接收器时,该传感器可检测17nm的位移变化。A new type displacement sensor based on few-mode multi-core fiber is presented.The sensor consists of two segments of single mode fiber and a segment of few-mode multi-core fiber.The sensing principle of the sensor is investigated and the experiments are performed to verify its feasibility.The experimental results show that the sensitivity of this sensor is-61.17 pm/μm with the elongation from0 to 60μm,error between the experimental results and the theoretical calculation is less than 3.9%.So the minimum change of displacement detected is 17 nm by using an optical spectrum analyzer（OSA）with high resolution.

关 键 词：传感器 光纤传感器 多芯少模光纤 模式干涉 位移变化量检测 

分 类 号：TN253[电子电信—物理电子学]