基于PDMS水滴型光纤挥发性有机化合物传感器  

Droplet-Type Optical Fiber Volatile Organic Compound Sensor Based on PDMS

作　　者：武洁雅 康娟 董洁 龚华平 徐贲 赵春柳 Wu Jieya;Kang Juan;Dong Jie;Gong Huaping;Xu Ben;Zhao Chunliu(College of Optical and Electronic Technology,China Jiliang University,Hangzhou 310018,Zhejiang,China)

机构地区：[1]中国计量大学光学与电子科技学院,浙江杭州310018

出　　处：《光学学报》2022年第21期213-219,共7页Acta Optica Sinica

基　　金：国家重点研发计划(2020YFF0217803);广东省信息光子技术重点实验室(广东工业大学)开放课题基金(GK⁃PT20-04)。

摘　　要：提出了一种基于聚二甲基硅氧烷(PDMS)的水滴型光纤挥发性有机化合物(VOC)传感器,用于检测VOC的泄漏。该传感器由一段标准单模光纤弯曲形成,其形状类似水滴,封装在PDMS中。实验通过监测传感器输出光谱的波长漂移情况来实现对VOC浓度的检测。实验结果表明:当PDMS吸收VOC时,体积膨胀,水滴型光纤结构的有效弯曲长度减小,在VOC体积分数为0~9960×10^(-6)范围内,输出光谱发生蓝移,其灵敏度为-0.542 pm/10^(-6),检测精度为37×10^(-6),响应时间为8.3 min;当采用强度解调方法时,1539.00 nm波长处的灵敏度最大(-3.22×10^(-4) dB/10^(-6)),检测精度为31×10^(-6)。A droplettype optical fiber volatile organic compound(VOC)sensor based on polydimethylsiloxane(PDMS)is proposed to detect the leakage of VOCs.The droplettype sensor is formed from a standard singlemode optical fiber that is bent and encapsulated in PDMS.In the experiment,the concentration of the VOC is obtained by monitoring the wavelength drift of output spectrum of the sensor.The experimental results show that when PDMS absorbs the VOC,its volume expands,and the effective bending length of the droplettype optical fiber structure decreases.The output spectrum of the sensor is blueshifted when the volume fraction of the VOC ranges from 0 to 9960×10^(-6).The sensitivity and detection accuracy of the sensor are-0.542 pm/10^(-6 )and 37×10^(-6),respectively,with a response time of 8.3 min.When the intensity demodulation method is adopted,the sensitivity of the sensor is the highest(-3.22×10^(-4) dB/10^(-6))at the wavelength of 1539.00 nm,and its detection accuracy is 31×10^(-6).

关 键 词：传感器 挥发性有机化合物传感器 水滴型光纤结构 回音壁模式 聚二甲基硅氧烷 

分 类 号：TN253[电子电信—物理电子学]