特殊LPFG温度传感器的灵敏度特性研究  

Research on sensitivity characteristics of special LPFG temperature sensor

作　　者：廖凌云 

机构地区：[1]南京邮电大学光电工程学院,南京210000

出　　处：《光通信技术》2018年第1期28-30,共3页Optical Communication Technology

摘　　要：普通长周期光纤光栅(LPFG)温度传感器的灵敏度较低,在一些需要对温度进行精确测量的领域中,该传感器的使用受到限制。为了解决这一问题,从理论上分析了LPFG温度传感器的灵敏度影响因子,并且依据理论分析,选取特殊的聚合物聚氯乙烯(PVC)和环氧树脂作为纤芯材料来进行灵敏度研究。仿真研究发现,与普通LPFG温度传感器相比,在一定的温度范围内,使用环氧树脂作为纤芯材料的光纤光栅温度传感器具有较大的温度灵敏度,在25℃~30℃之间温度灵敏度可以达到37.8nm/℃,相当于普通纤芯LPFG温度传感器的16倍。该结论表明,使用环氧树脂作为纤芯材料可以提高LPFG温度传感器的灵敏度,进一步拓展光纤光栅传感器的应用范围。The sensitivity of the conventional LPFG temperature sensor is low, which makes the use of LPFG temperature sensor limited in some areas requiring accurate temperature measurement. In order to solve this problem, this paper analyzes the sensitivity factors of LPFG temperature sensor theoretically, based on the theoretical analysis, the special polymer polyvinyl chloride （PVC） and epoxy resin are selected as core materi- als for sensitivity study. The simulation study shows that compared with the ordinary LPFG temperature sen- sor, in a certain temperature range, using epoxy resin as the core material of the optical fiber grating tempera- ture sensor with greater temperature sensitivity, temperature sensitivity can reach 37.8nm/~C at 25 ~C-30~C, e- quivalent to 16 times the common core LPFG fiber grating. This conclusion shows that using epoxy resin as core material can improve the sensitivity of LPFG temperature sensor, and further expand the application range of fiber grating sensor.

关 键 词：长周期光纤光栅 谐振波长 热光效应 热光系数 

分 类 号：TN929.1[电子电信—通信与信息系统]