【作者】 张晓亮；

【导师】 于凤霞； 李玮楠；

【作者基本信息】 长春理工大学 ， 材料物理与化学， 2010， 硕士

【摘要】 光热敏微晶玻璃作为制作高衍射效率光栅新型材料近年来被广泛研究。针对现代光学技术发展对高衍射效率光栅的需求,本文主要对光热敏微晶玻璃的组成、光敏析晶原理和性能等几个方面的内容进行了研究。通过选取Na-Zn-Al-Si的玻璃体系加入光敏剂和晶核剂和微晶引入物NaF,添加KBr和SnO₂用高温熔融法制备样品玻璃,并且通过样品进行紫外线曝光和热处理后制得的光热敏微晶玻璃进行光谱透过、激光损伤、和紫外曝光与热处理制度对玻璃的影响进行分析。通过XRD测试后发现析出微晶为NaF,并通过实验找到合适的紫外曝光和热处理制度。作为一种新型的体全息写入感光材料,本实验制得的样品玻璃有较高的抗激光损伤阈值,热稳定性超过了400℃。由于体光栅的衍射效率取决于制作材料受紫外线照射并热处理后析晶区域和未照射区域的折射率差值△n的值,经过热处理后,由于被照射部分发生析晶而导致折射率变化,照射区域与未曝光区域折射率差△n达到10^-4数量级,并且在红外区域和可见光区域的透过率达到90%以上。更多还原

【Abstract】 Photo-active glass-ceramic have been extensively studied in recent years for it is an attractive high diffraction efficiency grating materials. The composition, photosensitivity crystallization theory and performance of photo-active glass-ceramic are studied in this paper for the development of modern optical technology to the needs of high diffraction efficiency grating. The photo-active glass-ceramic is prepared by using photosensitizer nucleation agent NaF KBr SnO₂ and Sb₂O₃ doped the glass system of Na-Zn-Al-Si. Spectroscopic transmittance, laser-induced damage of photo-active glass-ceramic have been measured after ultraviolet irradiation and thermal treatment. Precipitation of microcrystalline glass samples for the NaF have been produced successfully and we have found appropriate ultraviolet irradiation and thermal treatment in the experiment.The glass which is produced in the experiment have high anti-laser damage thresholdand its thermal stability more than 400°C as a new kind of volume holographicphotosensitive materials. Volume grating diffraction efficiency depend on the refractiveindex difference values An which is between the crystallization region after ultraviolet irradiation and thermal treatment and non-irradiated region and transmittance between visible and infrared region. Due to variations of refractive index difference values which is caused by glass crystallization of exposed part. The refractive index difference values△n is up to 10^-4 order of magnitude and transmittance between infrared region and visible region is up to more than 90%.更多还原