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中文摘要：
基于倏逝波理论,设计了一种不受温度影响的衰荡腔探测系统,对碳纳米管和光纤的集成进行了探索性研究。利用碳纳米管物理吸附特性及高温解吸附特性,实现了对气体及易挥发溶剂的在线测量。利用移除包层的方法,根据倏逝波理论适当地选择移除包层的尺寸,避免了系统损耗过大,同时又增大了对外界折射率的灵敏度。利用偏振相关锁模激光器提供了2.5 ns,重复频率为400 kHz的短脉冲激光输入,实现了不受温度影响的高精度衰荡腔气体传感测量。
英文摘要：
According to the evanescent wave absorption theory,a cavity ring-down spectroscopy detection system which is immune to temperature perturbation is presented.Study has been done to explore the integration of carbon nanotubes and optical fiber apparatus.The physical absorption and desorption characteristic of carbon nanotubes is utilized to realize the measurement of gas or volatile organic solvent（VOS）.When fiber cladding is partially removed,the evanescent wave theory is utilized to select the appropriate diameter of fiber cladding,thus the system is sensitive to ambient refractive index and loss can be controlled.A pulsed laser beam with width of 2.5 ns according to the nonlinear polarization dependent mode locking technique is introduced into the ring-down system,and hence,our principle is validated by the highly-sensitive temperature-insensitive measurement of evanescent wave absorption loss.
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