Liquid refractive index sensor based on polymer fiber with micro-holes created by femtosecond laser  

作　　者：董文超 韦珏 王学海 康智慧 徐晓峰 

机构地区：[1]College of Physics, Jilin University

出　　处：《Chinese Optics Letters》2014年第9期6-9,共4页中国光学快报（英文版）

摘　　要：We present a liquid refractive index （RI） sensor based on step-index multimode polymer optical fiber with a micro-hole drilled by the femtosecond laser. The experimental results show that in the RI operation range of 1.333-1.473, the sensor has a good linear loss （dB） response to the liquid RI in the micro-holes and a high sensitivity of 18 dB/RIU approximately. The experimental results are explained with the mode of the refrac- tion loss caused by the hole core interface and connection loss caused by the gap of the holes. The sensor has many advantages including high sensitivity and low cost.We present a liquid refractive index （RI） sensor based on step-index multimode polymer optical fiber with a micro-hole drilled by the femtosecond laser. The experimental results show that in the RI operation range of 1.333-1.473, the sensor has a good linear loss （dB） response to the liquid RI in the micro-holes and a high sensitivity of 18 dB/RIU approximately. The experimental results are explained with the mode of the refrac- tion loss caused by the hole core interface and connection loss caused by the gap of the holes. The sensor has many advantages including high sensitivity and low cost.

关 键 词：Liquids Multimode fibers Plastic optical fibers REFRACTOMETERS Ultrashort pulses 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TN249[自动化与计算机技术—控制科学与工程]