公开(公告)号：WO2014149255A1

公开(公告)日：2014-09-25

申请号：PCT/US2014/016010

申请日：2014-02-12

Applicant: IMRA AMERICA, INC.

Inventor： FERMANN, Martin E. ,  LEE, Kevin F. ,  MILLS, Andrew A.

IPC: H01S3/10 ,  H01S3/13 ,  H01S3/098

CPC classification number: G01J3/42 ,  A61B5/082 ,  A61B5/097 ,  G01J3/453

Abstract: The present invention relates to a trace gas detection system. At least one embodiment includes a frequency spectrum comprising a 1 st comb and an enhancement cavity characterized by having a 2 nd comb of spectral resonances. The enhancement cavity contains a sample gas for spectroscopic measurement. A dither mechanism is configured to modulate the relative spectral position between the combs at a dither frequency, f d . The dither mechanism, in conjunction with a feedback mechanism, stabilizes the location of said 1st comb lines with respect to the resonances of said 2 nd comb over a time scale much greater than a dither period, T d = 1/f d . A time- averaged output from the enhancement cavity is provided to a spectroscopic measurement tool, for example a Fourier transform spectrometer. The system is capable of detecting volatile organic compounds, endogenous compounds, and may be configured for cancer detection.

Abstract translation: 痕量气体检测系统技术领域本发明涉及痕量气体检测系统。 至少一个实施例包括包括第一梳状物和增强腔体的频谱，其特征在于具有第二梳状光谱谐振。 增强腔包含用于光谱测量的样品气体。 抖动机构被配置为以抖动频率fd调制梳之间的相对光谱位置。 抖动机构结合反馈机制，稳定了所述第一梳状线相对于所述第二梳状体的谐振在比抖动周期Td = 1 / fd大得多的时间尺度上的位置。 来自增强腔的时间平均输出被提供给光谱测量工具，例如傅里叶变换光谱仪。 该系统能够检测挥发性有机化合物，内源性化合物，并可配置用于癌症检测。