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    SWEEP CONTROL OF AN OPTICAL HETERODYNE MEASUREMENT SYSTEM
    223.
    发明公开
    SWEEP CONTROL OF AN OPTICAL HETERODYNE MEASUREMENT SYSTEM 审中-公开

    公开(公告)号：EP3329231A1

    公开(公告)日：2018-06-06

    申请号：EP16831216.3

    申请日：2016-07-25

    Applicant: Finisar Corporation

    Inventor： POOLE, Simon ,  PULIKKASERIL, Cibby ,  LI, Qing ,  CUNHA, Nikhil ,  ROSENFELDT, Harold

    IPC: G01J3/433 ,  G01R23/14

    CPC classification number: G01J3/433 ,  G01J3/10 ,  G01J9/04

    Abstract: Described herein is a system and method of controlling an optical heterodyne measurement system (1). The measurement system (1) has a tunable laser (9) for generating a local oscillator signal, an optical input (5) for receiving an input optical signal (7) and a mixing module (13) for mixing the local oscillator signal with the input optical signal to generate an output optical measurement signal. One embodiment provides a method including the steps of: a) receiving an input electrical drive signal for driving the tunable laser (9) to produce a laser output having a spectral linewidth and peak central frequency; b) coupling the input electrical drive signal with an electrical linewidth control signal (54) to selectively broaden the spectral linewidth; and c) during a measurement period, selectively tuning the central frequency of the laser in a stepwise manner across a predetermined frequency spectrum at predefined tuning increments.

    OPTICAL SPECTROSCOPIC MEASUREMENT SYSTEM
    224.
    发明公开
    OPTICAL SPECTROSCOPIC MEASUREMENT SYSTEM 审中-公开
    光学光谱测量系统

    公开(公告)号：EP3230715A1

    公开(公告)日：2017-10-18

    申请号：EP15868087.6

    申请日：2015-12-10

    Applicant: Thorlabs, Inc.

    Inventor： JIANG, James ,  SCOTT, Marshall ,  GEOFFRION, Eric ,  CABLE, Alex

    IPC: G01N21/17

    CPC classification number: G01J3/36 ,  G01J3/433 ,  G01J3/4338 ,  G01N21/1702 ,  G01N21/39 ,  G01N2201/06113 ,  G01N2201/0691 ,  G01N2201/12

    Abstract: A system capable of highly sensitive measurement of material concentration values in a sample using an optical spectroscopic method is disclosed. The system utilizes high-speed data acquisition and high resolution sampling of the raw signals output by the sensors with reduced total channel counts, and performs frequency analysis of the signals using the Fourier transform method to process all sensor channels in parallel. When each sensor is targeting the detection of some certain materials at some certain frequencies, the system is capable of simultaneous detection of multiple materials of interest in the sample with high measurement sensitivity and high speed.

    Abstract translation: 公开了一种能够使用光学光谱方法高度灵敏地测量样本中的材料浓度值的系统。 该系统利用传感器输出的原始信号的高速数据采集和高分辨率采样，减少总信道数，并使用傅里叶变换方法对信号进行频率分析，以并行处理所有传感器信道。 当每个传感器的目标是在某些特定频率下检测某些特定材料时，系统能够以高测量灵敏度和高速同时检测样品中多种感兴趣的材料。

    VERFAHREN UND GASANALYSATOR ZUR MESSUNG DER KONZENTRATION EINER GASKOMPONENTE IN EINEM MESSGAS
    225.
    发明公开
    VERFAHREN UND GASANALYSATOR ZUR MESSUNG DER KONZENTRATION EINER GASKOMPONENTE IN EINEM MESSGAS 审中-公开
    VERFAHREN UND GASANALYSATOR ZUR MESSUNG DER KONZENTRATION EINER GASKOMPONENTE in EINEM MESSGAS

    公开(公告)号：EP3201604A1

    公开(公告)日：2017-08-09

    申请号：EP15774542.3

    申请日：2015-09-23

    Applicant: Siemens Aktiengesellschaft

    Inventor： STEINBACHER, Franz

    IPC: G01N21/39 ,  G01J3/433 ,  H01S5/062

    CPC classification number: G01N21/39 ,  G01J3/42 ,  G01J3/433 ,  G01N33/0009 ,  G01N2021/399 ,  G01N2201/0612 ,  G01N2201/0691 ,  H01S5/06213 ,  H01S5/06216 ,  H01S5/0622

    Abstract: The invention relates to a method and a gas analyser for measuring the concentration of a gas component in a measurement gas. In order to measure the concentration of a gas component in a measurement gas (1), a wavelength-tunable laser diode (3) is actuated with a current (i), and the light (4) generated by said laser diode (3) is passed through the measurement gas (1) to a detector (5). The current (i) is varied in periodically-consecutive sampling intervals so as to sample a gas component absorption line of interest, according to the wavelength. The current (i) can also be sinusoidally modulated with a low frequency and low amplitude in the context of wavelength modulation spectroscopy. A measurement signal (14) generated by the detector (5) is evaluated in order to obtain a measurement result (16). To improve the measurement signal-to-noise ratio and thus achieve a considerably lower limit of detection with the same measuring path, the current (i) is modulated with at least one high (HF) frequency in the GHz range such that no wavelength modulation takes place. The amplitude of the HF modulation is selected at a maximum intensity using the linear dynamic range of the laser diode (3). The measurement signal (14) is demodulated before its evaluation, at the point of the at least one high frequency.

    Abstract translation: 用于测量样气中气体成分浓度的方法和气体分析仪，其中为了测量样气中气体成分的浓度，激光二极管由电流启动，激光二极管产生的光通过 样品气体输送到检测器，则电流在周期性连续的采样间隔内同时变化，以用于气体组分的感兴趣的吸收线的取决于波长的采样，并且电流可以另外基于具有低频率的波长调制光谱来正弦地调制 和小振幅，从而评估由检测器产生的测量信号以形成测量结果，其中为了提高测量信噪比并且在相同的测量距离下实现低得多的检测极限，电流被调制为高 （RF）频率，使得不发生波长调制，并且选择RF调制幅度 最大电平使用激光二极管的线性控制范围，其中在评估之前，测量信号在无线电频率处被解调。

    COHERENTLY RECEIVING SIMULTANEOUS OPTICAL-BASED ELECTRICAL SIGNALS
    226.
    发明公开
    COHERENTLY RECEIVING SIMULTANEOUS OPTICAL-BASED ELECTRICAL SIGNALS 审中-公开
    相干地接收同步的基于光学的电信号

    公开(公告)号：EP3175225A1

    公开(公告)日：2017-06-07

    申请号：EP14899024.5

    申请日：2014-08-01

    Applicant: Newport Corporation

    Inventor： CHEN, Anderson ,  PARK, John

    IPC: G01N21/47 ,  G01N21/55 ,  G01N21/59

    CPC classification number: G01N21/55 ,  G01J3/00 ,  G01J3/02 ,  G01J3/0264 ,  G01J3/10 ,  G01J3/433 ,  G01J2003/104 ,  G01J2003/283 ,  G01J2003/2836 ,  G01J2003/4334 ,  G01N21/474 ,  G01N21/59 ,  G01N21/64 ,  G01N2021/556 ,  G01N2201/0691 ,  H02S50/10

    Abstract: Systems for measuring optical properties of a specimen are disclosed. The systems are configured to sample signals related to the measurement of the properties of a specimen, and perform software-based coherent detection of the signals to generate resulting measurements are based on the signals acquired at substantially the same time instance. This facilitates the displaying or generating of the desired measurements in real time. In one configuration, the system is configured to direct a modulated light signal at a selected wavelength incident upon a specimen. In another configuration, the system is configured to direct a combined light signal, derived from a plurality of light signals at different wavelengths and modulated with different frequencies, incident upon a specimen. In yet another configuration, the system is configured to direct a plurality of light signals modulated with different frequencies incident upon different regions of a specimen.

    Abstract translation: 公开了用于测量样本的光学性质的系统。 系统被配置为对与样本的属性的测量相关的信号进行采样，并且执行对信号的基于软件的相干检测，以基于在基本上相同的时刻采集的信号来生成结果测量。 这有助于实时显示或生成所需的测量结果。 在一种配置中，该系统被配置为引导入射到样本上的选定波长的调制光信号。 在另一种配置中，系统被配置为将从不同波长的多个光信号得到并用不同频率调制的组合光信号引导到样本上。 在又一种配置中，系统被配置为将以不同频率调制的多个光信号入射到样本的不同区域上。

    SYSTEM FOR ANALYZING A GAS MIXTURE
    227.
    发明公开
    SYSTEM FOR ANALYZING A GAS MIXTURE 审中-公开
    系统FÜRDIE分析EINES GASGEMISCHS

    公开(公告)号：EP3076159A1

    公开(公告)日：2016-10-05

    申请号：EP16160980.5

    申请日：2016-03-17

    Applicant: General Electric Company

    Inventor： MEYERS, Mark Marshall ,  ROBINSON, David Peter ,  MAITY, Sandip ,  KOVOORI SETHUMADHAVAN, Nagapriya

    IPC: G01N21/03 ,  G01N21/3504 ,  G01J3/433

    CPC classification number: G01N21/255 ,  G01J3/021 ,  G01J3/42 ,  G01J3/433 ,  G01N21/031 ,  G01N21/3504 ,  G01N33/0009

    Abstract: A system is presented. The system includes an absorption cell (104) filled-with a gas-mixture (102), a mirror-cum-window (106) comprising a first portion that acts as a first mirror (114) and a second portion that acts as a first window (116), a second mirror (110), a second window (118), a plurality of radiation sources (120,122,124) to generate a plurality of light beams (126,128,130) directed into the absorption cell (104) through the first window (116) followed by reflection of the plurality of light beams between the first mirror (114) and the second mirror (110) to irradiate the gas mixture (102) resulting in generation of a plurality of transmitted light beams (132,134) passing out of the absorption cell (104) through the second window (118), a detector (136) that detects at least one characteristic of the plurality of transmitted light beams (132,134) resulting in generation of one or more response signals (137,138), and a processing subsystem (140) that analyzes the gas-mixture at least based on the one or more response signals (137,138).

    Abstract translation: 提出了一个系统。 该系统包括填充有气体混合物（102）的吸收单元（104），包括充当第一反射镜（114）的第一部分的反射镜 - 窗口（106）和充当第一反射镜 第一窗口（116），第二反射镜（110），第二窗口（118），多个辐射源（120,122,124），以通过第一窗口产生引导到吸收单元（104）中的多个光束（126,128,130） （116），随后在第一反射镜（114）和第二反射镜（110）之间的多个光束的反射以照射气体混合物（102），导致产生多个透射光束（132,134） 通过第二窗口（118）的吸收单元（104），检测器（136），其检测导致产生一个或多个响应信号（137,138）的多个透射光束（132,134）的至少一个特性，以及 处理子系统（140），其至少基于该分析气体混合物 一个或多个响应信号（137,138）。

    TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY WITH WATER VAPOR DETERMINATION
    229.
    发明公开
    TUNABLE DIODE LASER ABSORPTION SPECTROSCOPY WITH WATER VAPOR DETERMINATION 审中-公开
    ABSTIMMBARE DIODENLASER-ABSORPTIONSSPEKTROSKOPIE MIT WASSERDAMPFBESTIMMUNG

    公开(公告)号：EP3011314A1

    公开(公告)日：2016-04-27

    申请号：EP14814152.6

    申请日：2014-06-19

    Applicant: Rosemount Analytical Inc.

    Inventor： KLUCZYNSKI, Pawel

    IPC: G01N21/39 ,  G01J3/42

    CPC classification number: G01N21/27 ,  G01J3/0205 ,  G01J3/021 ,  G01J3/42 ,  G01J3/433 ,  G01J3/4338 ,  G01J2003/423 ,  G01N21/39

    Abstract: A gas absorption spectroscopy system and method are provided. A sealed chamber is provided with a reference gas having a known moisture concentration. An illumination source (112) is disposed in the sealed chamber and is configured to generate an illumination beam. A measurement cell (104) is coupled to the sealed chamber and is configured for exposure to a gas sample (106) such that illumination (118) travelling through the measurement cell (104) passes through the gas sample (106). A process window (116) is disposed between the sealed chamber and the measurement cell (104). The process window (116) is configured to receive the illumination beam from the illumination source (112) and reflect a first portion (128) of illumination while allowing a second portion (118) of illumination to pass into the measurement cell (104). A reference detector (110) is disposed to receive the first portion (128) of illumination and provide a reference detector signal. A measurement detector (108) is disposed to receive the second portion (124) of illumination after the second portion of illumination has passed through the measurement cell (104) and provide a measurement detector signal. A controller (105) is coupled to the reference detector (110) and the measurement detector (108) and is configured to provide a compensated moisture output based on the reference detector signal and the measurement detector signal.

    Abstract translation: 提供了一种气体吸收光谱系统和方法。 密封室具有已知水分浓度的参考气体。 照明源设置在密封室中并且被配置为产生照明光束。 测量单元耦合到密封室，并且被配置为暴露于气体样品，使得穿过测量单元的照明通过气体样品。 处理窗口设置在密封室和测量池之间。 过程窗口被配置为从照明源接收照明光束并且反射照明的第一部分，同时允许第二部分照射进入测量单元。 设置参考检测器以接收照明的第一部分并提供参考检测器信号。 设置测量检测器以在第二部分照射通过测量单元之后接收照明的第二部分，并提供测量检测器信号。 控制器耦合到参考检测器和测量检测器，并且被配置为基于参考检测器信号和测量检测器信号来提供经补偿的湿度输出。

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