摘要
热透镜技术按照测量方式的不同可以分为反射式和透射式两种。这两种方式的灵敏度强烈地依赖于样品的热物理性质,对于不同的样品,选择合适的测量构型尤为重要。采用高斯激光束作为加热光源,分别从理论和实验上比较分析了模式不匹配的反射式和透射式两种热透镜探测构型在测量以BK7玻璃和石英为基底的高反射光学薄膜弱吸收中的应用,结果表明,对以BK7玻璃为基底的样品,采用反射式探测构型具有较高的灵敏度,而对以石英为基底的样品而言,采用透射式探测构型则具有更高的灵敏度,为实际光学薄膜吸收损耗测试灵敏度的提高提供了理论和实验依据。
Based on the configuration, TL techniques can be divided into reflected and transmitted thermal lens. The sensitivity of the two methods depends on the thermal properties of the sample. It is important to maximize the sensitivity by selecting appropriate configuration in terms of different samples. In this paper, the low absorption of the optical coating deposited on BK7 glass and silica substrates by the transmitted and reflected thermal lens techniques are studied. Numerical and experimental results show that, for BK7 glass substrate coating, the reflected TL configuration has a higher sensitivity, but for fused silica substrate coating, the transmitted TL configuration has a higher sensitivity.
出处
《光学与光电技术》
2010年第3期29-33,共5页
Optics & Optoelectronic Technology
基金
国家自然科学基金(60907041)
重庆邮电大学科研基金(A2009-05)资助项目
关键词
热透镜
吸收
反射
透射
灵敏度
thermal lens
absorption
reflection
transmission
sensitivity
