Investigation on an evanescent wave fiber-optic absorption sensor based on fiber loop cavity ring-down spectroscopy
Investigation on an evanescent wave fiber-optic absorption sensor based on fiber loop cavity ring-down spectroscopy
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基于光纤环腔衰荡光谱的倏逝波光纤吸收传感器研究
DOI：
10.1016/j.optcom.2009.07.015
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发表时间：
2010-01
影响因子：
2.4
通讯作者：
中科院分区：
文献类型：
--
作者：
提出了一种改进的光波导衰荡测量原理。光纤环路衰荡光谱分析可以测量高精度光纤腔中的微小光学损耗，并且不受光源波动的影响。从理论上分析了消逝波吸收损耗与环境溶液的吸收和折射率的关系。在模型中引入复折射率，通过设置光纤边界和环境条件，通过有限元分析可以精确地计算出消光系数。用这种方法可以考虑环境的折射率。通过对消逝波吸收损耗的高灵敏度测量，验证了我们的原理。通过沿扩展衰减腔对传感段表面进行化学处理，成功地测量和讨论了被腐蚀光纤浸入的小体积二乙基亚砜溶液的浓度。
An improved ring-down measurement principle for optical waveguides is presented. Fiber loop ring-down spectroscopy allows for measurement of minute optical losses in high-finesse fiber-optic cavities and immunity to the fluctuation of laser source. The evanescent wave absorption losses dependent on the absorption and the refractive index of ambient solution have been theoretically analyzed. The complex refractive index is introduced into our model and extinction coefficient can be calculated accurately through finite element analysis by setting the boundaries of the fiber and the ambient conditions. Using this method, the refractive index of environment can be taken into consideration. Our principle is validated by the highly-sensitive measurement of evanescent wave absorption loss. By chemically processing the surface of sensing segment along an extending ring-down cavity, the concentration of small volume Diethyl Sulphoxide solution where the etched fiber immersed into has been successfully measured and discussed.
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影响因子：
3.6
作者：
Wang, CJ;Scherrer, ST
通讯作者：
Scherrer, ST
影响因子：
4.6
作者：
D. E. Vogler;Ana Lorencak;J. Rey;M. Sigrist
通讯作者：
D. E. Vogler;Ana Lorencak;J. Rey;M. Sigrist
影响因子：
3.6
作者：
Sean Pu;X. Gu
通讯作者：
Sean Pu;X. Gu
影响因子：
4.4
作者：
Brown, RS;Kozin, I;Loock, HP
通讯作者：
Loock, HP
影响因子：
2.6
作者：
Ni, N.;Chan, C. C.;Shum, P.
通讯作者：
Shum, P.