公开(公告)号：US10175166B1

公开(公告)日：2019-01-08

申请号：US15928425

申请日：2018-03-22

Applicant: Axetris AG

Inventor： Andreas Wittmann ,  Sven Schlesinger ,  Torsten Platz

IPC: G01N21/39

Abstract: A method for operating an optical measuring system for measuring the concentration of a gas component in a measured gas, based on wavelength modulation spectroscopy, wherein a laser light source is operated in a current-modulated manner with a base current IDC and a modulation current IAC and a laser beam of the wavelength λ0 having a wavelength modulation amplitude ΔλAC is emitted, and the wavelength modulation amplitude ΔλAC of the laser light is kept constant by way of variable setting of the current modulation amplitude ΔIAC. The method provides for keeping a modulated power ΔPAC at an internal resistor RI of the laser light source constant at the operating point so as to stabilize the wavelength modulation amplitude ΔλAC.

公开(公告)号：US20200103342A1

公开(公告)日：2020-04-02

申请号：US16149295

申请日：2018-10-02

Applicant: Axetris AG

Inventor： Andreas Wittmann ,  Sven Schlesinger ,  Torsten Platz

IPC: G01N21/39 ,  G01J3/10 ,  H01S5/068 ,  H01S5/12

Abstract: A method for operating an optical measuring system including a wavelength-tunable temperature-stabilized laser light source for measuring the concentration of a target gas component in a measured gas, wherein an instantaneous base current IDC_ZG,act corresponding to a wavelength λZG of a target gas absorption line is set so that a wavelength distance ΔλDC defined during calibration between a target gas absorption line for a target gas component and a reference gas absorption line for a reference gas component is maintained. During operation, a relative temperature difference in the laser light source, defined in advance during calibration, between the operating points selected at the time of calibration of the reference gas, with a base current IDC_RG,cal, and the target gas component, with a base current IDC_ZG,cal, is maintained by determining the required instantaneous base current IDC_ZG,act for the target gas component, as a function of an instantaneous base current IDC_RG,act for the reference gas. The system includes a measuring system for carrying out the method.

公开(公告)号：US09377359B1

公开(公告)日：2016-06-28

申请号：US14613482

申请日：2015-02-04

Applicant: Axetris AG

Inventor： Andreas Wittmann ,  Marc-Oliver Zufferey ,  Urs Boegli ,  Kai Hassler

IPC: G01N21/00 ,  G01J3/45 ,  G01J3/28 ,  G01J3/44

CPC classification number: G01J3/45 ,  G01J3/0262 ,  G01J3/2803 ,  G01J3/4338 ,  G01J3/4412 ,  G01N21/3504 ,  G01N21/39

Abstract: An optical measuring system and a method for gas detection, the optical measuring system including a light emitter and at least one light detector arranged in at least one housing, wherein the light emitter emits a modulated main light beam with a mean wave length λ0 with a modulation span Δλ. At least one opto-mechanical component, e.g. a housing window including optically effective boundary surfaces, is arranged between the light emitter and the light detector and causes scatter light beams which interfere with the main light beam so that self-mixing occurs and/or etalons are caused. According to the invention the at least one opto-mechanical component is arranged relative to the light emitter and/or the light detector at an optimized distance L which is a function of the wave length λ0 and the modulation span Δλ of the main light beam.

Abstract translation: 一种光学测量系统和用于气体检测的方法，所述光学测量系统包括光发射器和布置在至少一个壳体中的至少一个光检测器，其中所述发光器发射具有平均波长λ0的调制主光束，其具有 调制范围＆Dgr;λ。 至少一个光机械部件，例如。 在光发射器和光检测器之间设置包括光学有效边界面的外壳窗，并引起与主光束干涉的散射光束，从而引起自发混合和/或标准具。 根据本发明，至少一个光机械部件相对于光发射器和/或光检测器以优化距离L布置，该距离L是主光的波长λ0和调制范围＆Dgr;λ的函数 光束。

公开(公告)号：US10739257B2

公开(公告)日：2020-08-11

申请号：US16149295

申请日：2018-10-02

Applicant: Axetris AG

Inventor： Andreas Wittmann ,  Sven Schlesinger ,  Torsten Platz

IPC: G01N21/39 ,  H01S5/12 ,  H01S5/068 ,  G01J3/10

Abstract: A method for operating an optical measuring system including a wavelength-tunable temperature-stabilized laser light source for measuring the concentration of a target gas in a measured gas, wherein an instantaneous base current IDC_ZG,act corresponding to a wavelength λZG of a target gas absorption line is set so that a wavelength distance ΔλDC defined during calibration between a target gas absorption line for a target gas and a reference gas absorption line for a reference gas is maintained. During operation, a temperature difference in the laser light source, defined in advance during calibration, between the operating points selected at the time of calibration of the reference gas, with a base current IDC_RG,cal, and the target gas, with a base current IDC_ZG,cal, is maintained by determining the required instantaneous base current IDC_ZG,act for the target gas, as a function of an instantaneous base current IDC_RG,act for the reference gas.