新型光敏聚合物全息传感器温度响应特征对比

Comparison of Temperature Response Characterization in Novel Holographic Sensor Based on Photosensitive Polymer

研制了一种具有热敏能力的新型N异丙基丙烯酰胺光致聚合物,并在此基础上研制新型全息传感器。温敏性能对比测试显示,相对于传统丙烯酰胺系统,新型全息传感器显著提高了波长响应范围与响应速度。温度与湿度作为两个重要的环境参量,对传感器的传感测量有着直接影响,并在测试中获得了指数形式的峰值波长蓝移曲线。传感器的恢复过程对比结果同样证实了新型传感器的优势。全息传感器传感现象直观、成本低廉,将该装置的响应特性应用于演示教学取得很好的教学效果。

Holographic sensor based on photopolymer has been much attention due to simple process, low cost, excellent performance, and obvious optical phenomenon. The fringe space recorded in the materials is changed when the environmental condition changes, especially temperature and humidity. It provides wavelength shift of diffraction peak, and the corresponding sensing process can be achieved. Temperature as a significant parameter can directly affect the sensing measurement of holographic sensor. This paper developed a novel N-isopropylacrylamide photopolymer with thermal-sensitivity, and the corresponding novel sensor based on the polymer. The comparison of thermal-sensitive capacity tests indicates an obvious improvement of *wavelength shift in response to the environmental conditions in novel photopolymer system. Temperature and humidity are two significant parameters for the holographic sensing response. The experimental result shows the blue shift of peak wavelength in exponential form at corresponding environmental conditions. In view of the evident experimental phenomenon and low cost, the corresponding experimental setup would be able to make the student understand the development of holographic optical elements and application area.