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An Advantaged Multiple-pass Herriott Cell
Hao Luyuan, Wu Guorong, Shi Qiang, Li Qi, Lin Hai, Zhu Qingshi
Laboratory for Bond-selective Chemistry, Chinese Academy of Science,Department of Chemical Physics, University of Science and Technology of China, Hefei 230026
Abstract:
A multiple-pass geometry for simple structure and easy adjustment is designed ,which consists of only a concave mirror and a plane mirror. The stability condition of this optical system is worked out. A design procedure for maximum number of reflection is described that includes a consideration of input ray diameter and divergence angle. A 56-pass cell is constructed for Ti: sapphire ring laser photoacoustic spectrometer. The calculated spot pattern is in good agreement with the experimental observation. This technique is useful for photoacoustic spectroscopy and long path absorption.
Key words:  Multipass, Stability condition, Photoacoustic effect
FundProject:国家自然科学基金资助项目(29703007)
附件
改进的Herriott型光学长程池
郝绿原*, 吴国荣, 史强, 李琦, 林海, 朱清时
中国科学技术大学,中国科学院选键化学开放研究实验室合肥 230026
摘要:
用凹面反射镜和平面反射镜组成结构简单、光路易调的光多次反射装置,计算了这种光学系统的稳定性条件。考虑实际入射光束的直径和发散角,给出了最大反射次数的求法。制成适用于钛宝石激光光声光谱仪的光56次通过的长程池。理论计算的反射光斑分布与实验观测一致。这个技术有利于提高光声光谱和吸收光谱的探测灵敏度。
关键词:  光学长程  稳定性条件  光声光谱
DOI:10.1088/1674-0068/14/2/147-153
分类号: