A New Type of Absorbance Sensors Based on Long-Period Fiber Gratings  

作　　者：LUO Tao GU Zheng-Tian 罗涛;顾铮(Laboratory of Photo-electric Functional Films,College of Science,University of Shanghai for Science and Technology,Shanghai 200093)

机构地区：[1]Laboratory of Photo-electric Functional Films,College of Science,University of Shanghai for Science and Technology,Shanghai 200093

出　　处：《Chinese Physics Letters》2011年第5期128-131,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 60777035;the Scientific Research Key Project of the Ministry of Education(208040);the Research Innovation Key Project of Education Committee of Shanghai(11ZZ131);Shanghai Leading Academic Discipline Project(S30502)。

摘　　要：A new absorbance sensor based on long-period fiber gratings(LPFGs)is presented,The measurand is coated on the cladding of the LPFG.It is found that the depth of the stop band of the LPFG spectrum will be strongly affected by the absorbance of the measurand if an optimum coating thickness is selected.The analysis showsthat within the optimal thickness range,the cladding modes could transform into the overlay modes and interact with the measurand more effectively.An absorbance sensitivity of 7×10^(3)is available when the sensor structure is optimized.

关 键 词：FIBER CLADDING OPTIMUM 

分 类 号：TN2[电子电信—物理电子学]