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    Method of Determining the Concentration of a Gas Component and a Spectrometer for this Purpose
    41.
    发明申请
    Method of Determining the Concentration of a Gas Component and a Spectrometer for this Purpose 审中-公开
    确定气体组分和光谱仪浓度的方法

    公开(公告)号：US20160377536A1

    公开(公告)日：2016-12-29

    申请号：US15192120

    申请日：2016-06-24

    Applicant: SICK AG

    Inventor： Thomas BEYER ,  Julian EDLER

    IPC: G01N21/39

    CPC classification number: G01N21/39 ,  G01J2003/423 ,  G01J2003/4332 ,  G01N21/031 ,  G01N33/0062 ,  G01N2021/399 ,  G01N2201/0691

    Abstract: The invention relates to a method of determining the concentration of a gas component comprising the steps: generating and guiding a light beam having a wavelength variable in a wavelength range through a measurement volume in which the gas component having an absorption in the wavelength range is present; tuning the wavelength range; detecting the intensity of the light beam after passage through the measurement volume; storage of measurement points during the tuning that respectively consist of a point in time and an associated intensity value, to obtain a direct absorption line; generating an artificial measurement curve from the stored measurement points by shifting the measurement points on the time axis; wherein the shift takes place so that an artificial modulation results in the wavelength time extent; and evaluating the artificial measurement curve in accordance with the method of the wavelength modulation spectroscopy and determining a first concentration value therefrom.

    GAS DETECTION SYSTEM USING INTRACAVITY FIBER LASER WITH LOOP CAVITY HAVING SATURATED ABSORPTION FIBER
    45.
    发明申请
    GAS DETECTION SYSTEM USING INTRACAVITY FIBER LASER WITH LOOP CAVITY HAVING SATURATED ABSORPTION FIBER 有权
    使用具有饱和吸收纤维的环形孔的入口光纤激光器的气体检测系统

    公开(公告)号：US20150102240A1

    公开(公告)日：2015-04-16

    申请号：US14509604

    申请日：2014-10-08

    Applicant: Beijing Information Science & Technology University

    Inventor： Lianqing Zhu ,  Fei Luo ,  Mingli Dong ,  Wei He ,  Yinmin Zhang ,  Xiaochen Meng ,  Zhehai Zhou

    IPC: G01N21/61 ,  G01N33/00

    CPC classification number: G01N21/39 ,  G01J3/0218 ,  G01J3/42 ,  G01J2003/423 ,  G01N21/255 ,  G01N2021/391

    Abstract: A gas detection system with an inner ring cavity fiber laser using saturated absorption optical fiber is provided. The system comprising a ring fiber laser consisted of a pump source, a wavelength division multiplexer, a first active optical fiber, a first coupler, a fiber Bragg grating and a second coupler connected successively; an optical isolator coupled between said first active optical fiber and said first coupler; a second active grating connected between said fiber Bragg grating and said first coupler; a detection gas chamber connected between said first coupler and said second coupler; a first photoelectric detector for detecting the laser intensity outputted from said ring fiber laser to generate a first light intensity signal; a second photoelectric detector for receiving the intensity measuring beam passing through the detection gas chamber to generate a second light intensity signal; and a feedback control unit.

    Abstract translation: 提供了一种使用饱和吸收光纤的内环腔光纤激光器的气体检测系统。 该系统包括环形光纤激光器，其由泵浦源，波分多路复用器，第一有源光纤，第一耦合器，光纤布拉格光栅和连续连接的第二耦合器组成。 耦合在所述第一有源光纤和所述第一耦合器之间的光隔离器; 连接在所述光纤布拉格光栅和所述第一耦合器之间的第二有源光栅; 连接在所述第一耦合器和所述第二耦合器之间的检测气室; 用于检测从所述环形光纤激光器输出的激光强度以产生第一光强度信号的第一光电检测器; 第二光电检测器，用于接收通过检测气室的强度测量光束，以产生第二光强度信号; 和反馈控制单元。

    BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES
    46.
    发明申请
    BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES 审中-公开
    宽带或中红外光纤光源

    公开(公告)号：US20150008344A1

    公开(公告)日：2015-01-08

    申请号：US14186171

    申请日：2014-02-21

    Applicant: OMNI MEDSCI, INC.

    Inventor： Mohammed N. ISLAM

    IPC: H01S5/10 ,  H01S5/14 ,  H01S5/00

    CPC classification number: G01J3/108 ,  G01B9/02091 ,  G01J3/0218 ,  G01J3/0245 ,  G01J3/42 ,  G01J2003/102 ,  G01J2003/423 ,  G02B6/29349 ,  G02F1/365 ,  G02F2001/3528 ,  G02F2202/32 ,  H01S3/06725 ,  H01S3/06754 ,  H01S3/094007 ,  H01S3/094069 ,  H01S3/094076 ,  H01S3/1024 ,  H01S3/302 ,  H01S5/0064 ,  H01S5/0085 ,  H01S5/0092 ,  H01S5/1092 ,  H01S5/146 ,  H01S5/4012 ,  H01S2301/085

    Abstract: An optical system for use in material processing includes a plurality of semiconductor diodes coupled to a beam combiner to generate a multiplexed optical beam. A cladding pumped fiber amplifier or laser receives the multiplexed optical beam and forms an intermediate beam having at least a first wavelength. An optical element receives the intermediate beam and forms an output beam with an output beam wavelength, wherein the output beam wavelength is at least in part longer than the first wavelength. A subsystem includes lenses or mirrors to deliver a delivered portion of the output beam to a sample. The delivered output beam has a temporal duration greater than about 30 picoseconds, a repetition rate between continuous wave and Megahertz or higher, and a time averaged intensity of less than approximately 50 MW/cm2. The output beam has a time averaged output power of 20 mW or more.

    Abstract translation: 用于材料处理的光学系统包括耦合到光束组合器的多个半导体二极管以产生多路复用的光束。 包层泵浦光纤放大器或激光器接收复用的光束并形成具有至少第一波长的中间光束。 光学元件接收中间光束并形成具有输出光束波长的输出光束，其中输出光束波长至少部分地长于第一波长。 子系统包括透镜或反射镜，用于将输出光束的传送部分传送到样品。 所输出的输出光束具有大于约30皮秒的时间持续时间，连续波和兆赫兹或更高之间的重复频率以及小于约50MW / cm 2的时间平均强度。 输出光束的时间平均输出功率为20mW以上。

    External Cavity Laser Source
    47.
    发明申请
    External Cavity Laser Source 有权
    外腔激光源

    公开(公告)号：US20120206725A1

    公开(公告)日：2012-08-16

    申请号：US13154516

    申请日：2011-06-07

    Applicant: Pajo Vukovic-Cvijin ,  Neil Goldstein

    Inventor： Pajo Vukovic-Cvijin ,  Neil Goldstein

    IPC: H01S3/10 ,  G01J3/28

    CPC classification number: G01J3/433 ,  G01J3/0229 ,  G01J3/10 ,  G01J3/18 ,  G01J2003/423 ,  H01S3/08009 ,  H01S3/0816 ,  H01S5/02248 ,  H01S5/1092 ,  H01S5/141 ,  H01S5/3402 ,  H01S5/4062 ,  H01S5/4087

    Abstract: A tunable laser source that includes multiple gain elements and uses a spatial light modulator in an external cavity to produce spectrally tunable output is claimed. Several designs of the external cavity are described, targeting different performance characteristics and different manufacturing costs for the device. Compared to existing devices, the tunable laser source produces high output power, wide tuning range, fast tuning rate, and high spectral resolution.

    Abstract translation: 声称包括多个增益元件并且在外部空腔中使用空间光调制器以产生光谱可调谐输出的可调谐激光源。 描述了外部空腔的几种设计，针对设备的不同性能特征和不同的制造成本。 与现有器件相比，可调激光源产生高输出功率，宽调谐范围，快速调谐率和高光谱分辨率。

    METHOD OF ANALYZING AND CONTROLLING A COMBUSTION PROCESS IN A GAS TURBINE AND APPARATUS FOR PERFORMING THE METHOD
    48.
    发明申请
    METHOD OF ANALYZING AND CONTROLLING A COMBUSTION PROCESS IN A GAS TURBINE AND APPARATUS FOR PERFORMING THE METHOD 有权
    分析和控制燃气涡轮机燃烧过程的方法和实施方法的装置

    公开(公告)号：US20120136483A1

    公开(公告)日：2012-05-31

    申请号：US13300110

    申请日：2011-11-18

    Applicant: Ken Yves HAFFNER

    Inventor： Ken Yves HAFFNER

    IPC: G05B21/02 ,  G06N3/02 ,  G06N7/02

    CPC classification number: G01J5/0014 ,  G01J3/42 ,  G01J5/0821 ,  G01J2003/2833 ,  G01J2003/2873 ,  G01J2003/423 ,  G01N21/274 ,  G01N21/3504 ,  G01N21/39

    Abstract: A method is provided for the measurement of parameters of a gas present in a gas turbine combustion chamber. The method includes tuning a laser to a range containing the absorption lines of species to be analyzed in the gas, and directing the laser light through the combustion chamber and detecting laser light reflected off boundary walls of the combustion chamber. In order to analyze the absorption spectrum measured at high temperatures and pressures, a signature recognition algorithm is applied to the spectrum. The measured absorption spectrum is cross-correlated with a calibration absorption model spectrum for the absorption lines at several temperatures, pressures, and concentrations generated prior to the measurement. Values for pressure, temperature, and concentrations of selected species in the gas are determined simultaneously allowing direct control of the combustion chamber process. An apparatus for carrying out the method is also provided.

    Abstract translation: 提供了一种用于测量燃气轮机燃烧室中存在的气体的参数的方法。 该方法包括将激光调谐到包含待分析物质的吸收线的范围内，并将激光引导通过燃烧室并检测从燃烧室的边界壁反射的激光。 为了分析在高温和高压下测得的吸收光谱，应用了一个签名识别算法。 测量的吸收光谱与在测量之前产生的几个温度，压力和浓度下的吸收谱线的校准吸收模型光谱互相关。 同时确定气体中选定物种的压力，温度和浓度值，直接控制燃烧室过程。 还提供了一种用于执行该方法的装置。

    Method and apparatus for the monitoring and control of a process
    49.
    发明授权
    Method and apparatus for the monitoring and control of a process 有权
    用于监测和控制过程的方法和装置

    公开(公告)号：US07469092B2

    公开(公告)日：2008-12-23

    申请号：US11782492

    申请日：2007-07-24

    Applicant: Andrew D. Sappey ,  James Howell ,  Henrik Hofvander ,  Bernard Patrick Masterson

    Inventor： Andrew D. Sappey ,  James Howell ,  Henrik Hofvander ,  Bernard Patrick Masterson

    IPC: G02B6/00

    CPC classification number: G01J3/36 ,  G01J3/02 ,  G01J3/0202 ,  G01J3/0208 ,  G01J3/0218 ,  G01J3/0237 ,  G01J3/024 ,  G01J3/0289 ,  G01J3/0297 ,  G01J3/108 ,  G01J3/1809 ,  G01J5/601 ,  G01J2003/104 ,  G01J2003/423 ,  G01N21/359 ,  G01N21/39 ,  G01N2021/399 ,  G02B6/14

    Abstract: A diode laser spectroscopy gas sensing apparatus having a diode laser with a select lasing frequency, a pitch optic coupled to the diode laser with the pitch optic being operatively associated with a process chamber and oriented to project laser light along a projection beam through the process chamber. This embodiment additionally includes a catch optic in optical communication with the pitch optic to receive the laser light projected through the process chamber and an optical fiber optically coupled to the catch optic. In addition, the catch optic is operatively associated with a catch side alignment mechanism which provides for the alignment of the catch optic with respect to the projection beam to increase a quantity of laser light received by the catch optic from the pitch optic and coupled to the optical fiber and a detector sensitive to the select lasing frequency optically coupled to the optical fiber. The catch side alignment mechanism may consist of means to tilt the catch optic along a first axis and a second axis orthogonal to the first axis with both the first and second axes being approximately orthogonal to the projection beam.

    Abstract translation: 一种具有选择激光频率的二极管激光器的二极管激光光谱气体感测装置，耦合到二极管激光器的俯仰光学器件，其中俯仰光学器件与处理室可操作地相关联并且被定向成沿着投影束将激光投射通过处理室 。 该实施例另外包括与俯仰光学器件光学通信的接收光学器件，以接收通过处理室投射的激光，以及光学耦合到捕捉光学器件的光纤。 另外，捕捉光学元件与捕捉侧对准机构可操作地相关联，该机构提供捕获光学元件相对于投影光束的对准，以增加由光阑从俯仰光学元件接收的激光的数量并耦合到 光纤和对光纤耦合的选择激光频率敏感的检测器。 捕获侧对准机构可以包括用于使捕获光学器件沿第一轴线和与第一轴线正交的第二轴线倾斜的装置，其中第一和第二轴线几乎与投影光束正交。

    Method And Apparatus For The Monitoring And Control Of A Process
    50.
    发明申请
    Method And Apparatus For The Monitoring And Control Of A Process 审中-公开
    一种过程监控的方法和装置

    公开(公告)号：US20070263956A1

    公开(公告)日：2007-11-15

    申请号：US11782483

    申请日：2007-07-24

    Applicant: Andrew Sappey ,  James Howell ,  Henrik Hofvander ,  Bernard Masterson

    Inventor： Andrew Sappey ,  James Howell ,  Henrik Hofvander ,  Bernard Masterson

    IPC: G02B6/00

    CPC classification number: G01J3/36 ,  G01J3/02 ,  G01J3/0202 ,  G01J3/0208 ,  G01J3/0218 ,  G01J3/0237 ,  G01J3/024 ,  G01J3/0289 ,  G01J3/0297 ,  G01J3/108 ,  G01J3/1809 ,  G01J5/601 ,  G01J2003/104 ,  G01J2003/423 ,  G01N21/359 ,  G01N21/39 ,  G01N2021/399 ,  G02B6/14

    Abstract: A catch side optical system for use in diode laser spectroscopy consisting of a catch side optic optically coupled to a catch side multimode optical fiber and means to mechanically manipulate a section of the catch side multimode optical fiber to minimize catch side mode noise. The mechanical manipulation may consist of twisting the catch side multimode optical fiber around its longitudinal axis. The means to mechanically manipulate the section of the catch side multimode optical fiber in the above fashion may consist of a motor associated with the catch side multimode optical fiber such that a section of fiber is held fast relative to a shaft position of the motor and the motor shaft is repetitively swept through +360 degrees and −360 degrees of motion. The frequency of the motor shaft sweep may be at least 10 Hz to enable effective averaging of the transmitted signal and thereby reduce the effect of catch side mode noise.

    Abstract translation: 用于二极管激光光谱的捕获侧光学系统，其由光学耦合到捕获侧多模光纤的捕获侧光学和用于机械地操纵捕获侧多模光纤的一部分以最小化捕获侧模式噪声的装置组成。 机械操纵可以包括围绕其纵向轴线扭转捕获侧多模光纤。 以上述方式机械地操纵扣合侧多模光纤的部分的装置可以由与捕获侧多模光纤相关联的马达组成，使得光纤的一部分相对于马达的轴位置保持快速，并且 电机轴重复扫过+ 360度和-360度的运动。 电机轴扫描的频率可以至少为10 Hz，以实现发射信号的有效平均，从而减少捕获侧模式噪声的影响。

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