论文部分内容阅读
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。
Based on the theory of evanescent wave, a ring-down detection system is designed which is not affected by temperature. The integration of carbon nanotubes and optical fibers is explored. Using the physical adsorption properties of carbon nanotubes and high temperature desorption characteristics, on-line measurement of gases and volatile solvents was achieved. By using the method of removing the cladding, the size of the cladding is properly selected according to the evanescent wave theory to avoid excessive system loss and increase the sensitivity to the external refractive index. A 2.5 ns pulse repetition frequency 400 kHz short pulse laser input is provided using a polarization-dependent mode-locked laser to achieve high-precision gas sensing without temperature effects.