基于聚合物体光栅的全息传感器温度响应特性

Temperature Response of Holographic Sensor Based on Volume Grating Recorded in Photopolymer

测试了全息传感器的环境温度响应性能,实验测试中光栅衍射谱峰值呈现直观与稳定的温度响应,并发现了衍射谱峰值波长随温度的蓝移现象。测试了在不同温度及湿度条件下的平均折射率,证实了波长蓝移的主要诱因。实验结果为深入分析传感器的传感机制提供了重要实验基础,同时为全息传感器的实用化提供了重要环境响应参数。在显著传感现象的基础上,能够使学生了解并掌全息光学装置科技前沿发展现状与最新应用领域。

Recently, holographic sensor based on polymer has been much noticed due to simple process, low cost,excellent performance, and obvious optical phenomenon. The fringe space recorded inside the materials can be changed when the environmental condition changes, especially temperature and humidity. It brings about wavelength shift of diffraction peak. The corresponding sensing process is achieved during the process. Temperature as a significant parameter can directly affect the sensing measurement of holographic sensor. This paper shows the temperature response characterization of holographic sensor. The peak wavelength of diffraction spectrum presents an intuitive temperature response process. The obvious blue shift of peak wavelength is observed during sensing process. The measuring average refractive index at various temperature and humidity demonstrate the inducement of the blue shift. The experiments provide the significant foundation and responsive parameters for its practical application and analyzing the sensing mechanism. Due to the evident experimental phenomena and low cost, the corresponding experimental setup would be able to make the student understand the development of holographic optical elements and application area.