Fiber optic evanescent wave spectroscopy (FEWS)
Fiber optic evanescent wave spectroscopy (FEWS)
复制标题
光纤倏逝波光谱 (FEWS)
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
A. Katzir
中科院分区：
文献类型：
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作者：
A. Katzir
倏逝波从无包层光纤中泄漏出来，并且它可以在靠近光纤的样品中被吸收。关于这些样品的特征吸收线的信息可以从作为波长的函数的光纤的传输的测量获得。所得到的光纤倏逝波光谱（FEWS）然后可用于研究与光纤接触的样品。FEWS已经在可见光和紫外线中使用石英纤维进行了测试。现在可以将光谱范围扩展到中红外和远红外，使用FTIR光谱仪结合放置在光谱仪内部或外部的红外传输光纤。这就产生了一个新的家庭的光纤化学传感器，是有选择性的，灵敏和快速。
An evanescent wave leaks out of an unclad optical fiber and it can be absorbed in samples that are in close proximity to the fiber. Information about the characteristic absorption lines of these samples may be obtained from measurements of the transmission of the fiber as a function of wavelength. The resulting Fiberoptic Evanescent Wave Spectroscopy (FEWS) may then be used for studying samples in contact with the fibers. FEWS has already been performed in the visible and in the UV, using silica fibers. It is possible now to extend the spectral range to the mid and far IR, using FTIR spectrometers in conjunction with IR transmitting fibers that are placed inside the spectrometers or externally. This gives rise to a novel family of fiberoptic chemical sensors that are selective, sensitive and fast.