公开(公告)号：US07318909B2

公开(公告)日：2008-01-15

申请号：US10157400

申请日：2002-05-29

申请人： Kevin K. Lehmann ,  Peter B. Tarsa ,  Paul Rabinowitz

发明人： Kevin K. Lehmann ,  Peter B. Tarsa ,  Paul Rabinowitz

IPC分类号： G02N30/00

CPC分类号： G01N21/39 ,  G01J3/42 ,  G01N21/552 ,  G01N2021/391 ,  G01N2021/7789

摘要： An apparatus for detection and measurement of trace species in a gas or liquid sample. A sensor of a ring down cell formed from an optical fiber is exposed to the sample gas or liquid. A coherent source emits radiation into the optical fiber loop, which in turn is received at an output coupler. The fiber optic ring is coupled to a sensor which has a portion thereof, between the input and output, exposed to the sample gas or sample liquid. The sensor has an enhanced evanescent region. A processor is coupled to the receiver and determines the level of trace species in the gas or liquid sample based on the rate of decay of the radiation within the fiber optic ring.

摘要翻译： 用于检测和测量气体或液体样品中微量物质的装置。 由光纤形成的环形电池的传感器暴露于样品气体或液体。 相干光源将辐射发射到光纤回路中，光纤回路又在输出耦合器处接收。 光纤环耦合到传感器，该传感器具有在输入和输出之间暴露于样品气体或样品液体中的一部分。 传感器具有增强的渐逝区域。 处理器耦合到接收器，并且基于光纤环内的辐射的衰减速率来确定气体或液体样品中痕量物质的水平。