偶氮苯
光纤布拉格光栅
材料科学
光异构化
波长
紫外线
光电子学
聚合物
部分
线性
光学
化学
物理
异构化
复合材料
生物化学
催化作用
量子力学
立体化学
作者
Hyun‐Kyoung Kim,Woojin Shin,Tae-Jung Ahn
出处
期刊:IEEE Photonics Technology Letters
[Institute of Electrical and Electronics Engineers]
日期:2010-07-22
卷期号:22 (19): 1404-1406
被引量:38
标识
DOI:10.1109/lpt.2010.2059375
摘要
A simple ultraviolet (UV) sensor based on a photomechanical responsible material (azobenzene moiety) and a typical fiber Bragg grating (FBG) has been proposed and demonstrated for the first time. This sensing device, called the azobenzene-coated FBG sensor, can easily measure the UV light intensity by determination of its center wavelength shift which results from the photoisomerization of the azobenzene moieties. We show that the peak wavelength can be rapidly shifted up to 0.6 nm because of the photomechanical stretching effect of the azobenzene-coated FBG. The strain applied to the FBG under a UV intensity of 208 mW/cm 2 was estimated to be 0.054%. We have also confirmed the linearity and stability of our proposed UV sensor.
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