Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements
Use of diffuse reflections in tunable diode laser absorption spectroscopy: implications of laser speckle for gas absorption measurements
复制标题
漫反射在可调谐二极管激光吸收光谱中的应用：激光散斑对气体吸收测量的影响
DOI：
10.1007/s00340-007-2896-z
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
R. Tatam
中科院分区：
文献类型：
--
作者：
D. Masiyano;J. Hodgkinson;R. Tatam
The use of diffusely scattering materials as a means of eliminating interference fringes has been investigated. Their use introduces laser speckle that can contribute a random, rather than periodic, uncertainty to gas measurements. We have established a method for quantifying the uncertainty due to speckle and investigated ways of reducing it. We characterised the speckle at 823 nm allowing the use of low-cost CCD cameras. We have tested the principle of the model by making gas absorption measurements on the 1650-nm methane absorption line using wavelength-modulation spectroscopy, for which preliminary results are presented.
