光学学报, 2013, 33 (1): 0109001, 网络出版: 2012-11-06   

光热折变体光栅变波长读出特性及稳定性研究

Diffractive Readout Characteristics and Stability of Photo-Thermo-Refractive Volume Holographic Grating
作者单位
1 北京工业大学 微纳信息光子技术研究所, 北京 100124
2 北京工业大学应用数理学院, 北京 100124
摘要
光热折变体光栅是在光敏玻璃材料中利用光热折变效应记录的折射率型体全息光栅,具有波长和角度选择性好、衍射效率高、热稳定性好和抗损伤阈值高等特点,在激光器技术领域中具有独特的优势。在自行制备的光敏玻璃材料中,用325 nm波长的紫外光曝光记录透射型体全息光栅,基于变波长读出的原理设计实验,对热显影后的光热折变体光栅在532 nm波长的激光照射下的衍射读出特性以及其在恒定光功率密度的激光照射下的稳定性进行了实验研究。研究结果表明,热显影后的光热折变体光栅在激光辐照下具有光致饱和效应。根据实验结果定量计算出了光热折变体光栅的选择角和描述光致饱和效应的特征时间常数。
Abstract
The photo-thermo-refractive (PTR) volume grating is formed by PTR effect in photo-sensitive glass. PTR volume holographic grating has unique advantages for the applications of laser technologies owing to its excellent wavelength and angular selectivity, high diffraction efficiency, high thermal stability and high damage threshold. The diffractive characteristics and stability of the photo-thermo-refractive volume grating are investigated. A transmission hologram is recorded under 325 nm laser exposure in the PTR glass. According to the principle of variable wavelength readout, experimental setup is designed for readout of transmission photo-thermo-refractive volume grating. The angular selectivity and the stability under laser irradiation of the transmission PTR volume grating after thermal development are measured experimentally. The photo-saturation effect is observed and a characteristic time constant is acquired through by fitting the calculation and experimental results to describe the stability.
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万玉红, 林琳, 刘国庆, 陶世荃, 江竹青, 王大勇. 光热折变体光栅变波长读出特性及稳定性研究[J]. 光学学报, 2013, 33(1): 0109001. Wan Yuhong, Lin Lin, Liu Guoqing, Tao Shiquan, Jiang Zhuqing, Wang Dayong. Diffractive Readout Characteristics and Stability of Photo-Thermo-Refractive Volume Holographic Grating[J]. Acta Optica Sinica, 2013, 33(1): 0109001.

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