公开(公告)号：US07679059B2

公开(公告)日：2010-03-16

申请号：US11715599

申请日：2007-03-07

Applicant: Xin Zhou

Inventor： Xin Zhou

IPC: G01J3/42

CPC classification number: G01N21/3554 ,  G01J3/02 ,  G01J3/027 ,  G01J3/42 ,  G01J3/4338 ,  G01N21/031 ,  G01N21/0332 ,  G01N21/3504 ,  G01N21/39 ,  G01N33/0036 ,  G01N33/22

Abstract: Low concentrations of water vapor within a background of one or more olefin gases may be detected and quantified using a differential absorption spectrometer. A dehydrated sample of the gas is used as a background sample whose absorption spectrum allows elimination of absorption features not due to water vapor in the gas. Absorption spectra may recorded using tunable diode lasers as the light source. These lasers may have a wavelength bandwidth that is narrower than the water vapor absorption feature used for the differential absorption spectral analysis.

Abstract translation: 可以使用差示吸收光谱仪检测和定量在一种或多种烯烃气体背景下的低浓度水蒸气。 将脱气的气体样品用作背景样品，其吸收光谱允许消除不是由于气体中的水蒸气引起的吸收特征。 可以使用可调谐二极管激光器作为光源记录吸收光谱。 这些激光器可以具有比用于差分吸收光谱分析的水蒸汽吸收特征窄的波长带宽。

公开(公告)号：US07027470B2

公开(公告)日：2006-04-11

申请号：US10639241

申请日：2003-08-11

Applicant: Randy Dean May

Inventor： Randy Dean May

IPC: H01S3/10 ,  H01S3/13

CPC classification number: G01J3/02 ,  G01J3/0286 ,  G01J3/26 ,  G01J3/28 ,  G01J9/00 ,  H01S3/1303 ,  H01S5/0014 ,  H01S5/0617 ,  H01S5/0687 ,  H01S5/4087

Abstract: The method and system operate to maintain a widely tunable laser (WTL) at a selected transmission wavelength. To lock the WTL to an ITU grid line, a portion of the output beam from the WTL is routed through the etalon to split the beam into a transmission line for detection by an etalon fringe detector. Another portion of the beam is routed directly to a laser wavelength detector to determine the power of the beam. A wavelength-locking controller compares signals from the two detectors and adjusts the temperature of the etalon to align the wavelength of one of the transmission lines of the etalon with the wavelength of the output beam, then controls the WTL in a feedback loop to lock the laser to the etalon line. The wavelength-locking controller thereafter monitors the temperature of the etalon and keeps the temperature constant to prevent any wavelength drift attributable to the etalon.

Abstract translation: 该方法和系统用于维持在选定的透射波长下的广泛可调激光（WTL）。 为了将WTL锁定到国际电联电网线路，来自WTL的输出波束的一部分被路由通过标准具将光束分成传输线，以便由标准具条纹检测器进行检测。 光束的另一部分被直接路由到激光波长检测器以确定光束的功率。 波长锁定控制器比较来自两个检测器的信号，并调节标准具的温度以使标准具的传输线之一的波长与输出光束的波长对准，然后在反馈回路中控制WTL以锁定 激光到标准具线。 此后，波长锁定控制器监测标准具的温度并保持温度恒定，以防止归因于标准具的任何波长漂移。