An Optical Fiber Resonator for Cavity Ring-down Spectroscopic Detection and Measurement of Trace Species

普林斯顿大学的Kevin Lehmann教授获得了分析和表面化学计划的SGER资助，以开发化学环降光谱的光纤版本，该版本将允许测量气体和可能的液体中的痕量物质。 该方法利用了腔衰荡中涉及的长路径长度以及光纤中光波的倏逝特性。 如果成功，这种传感器可以用于远距离检测化学和生物物种，例如使用穿过建筑物或水库的光纤电缆。 光纤束可用于多任务感测。 利用现有的通信设备可能使这成为一个可行的具有成本效益的系统。 这些应用包括国家安全、环境监测以及可能的体内医疗监测。

Professor Kevin Lehmann of Princeton University is supported with an SGER grant from the Analytical and Surface Chemistry Program to develop an optical fiber version of chemical ring down spectroscopy that will allow measurement of trace species in gases and possibly liquids. The method takes advantage of the long pathlength involved in cavity ring down, as well as evanescent properties of the light wave in the fiber. If successful, this sensor could be used to detect chemical and biological species over distances, e.g. using fiber optic cables through buildings or reservoirs. Fiberoptic bundles can be used to multitask the sensing. The use of available communication equipment potentially makes this a viable cost-efficient system. The applications include national security, environmental monitoring, and possibly in vivo medical monitoring.