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    Method and apparatus for infrared spectrometry
    11.
    发明授权
    Method and apparatus for infrared spectrometry 有权
    红外光谱法的方法和装置

    公开(公告)号：US07939805B2

    公开(公告)日：2011-05-10

    申请号：US11155927

    申请日：2006-05-18

    Applicant: Leslie Brandon Shaw ,  Jasbinder S. Sanghera ,  Ishwar D. Aggarwal

    Inventor： Leslie Brandon Shaw ,  Jasbinder S. Sanghera ,  Ishwar D. Aggarwal

    IPC: G01B9/02 ,  G01J3/00 ,  G01J3/45

    CPC classification number: G01J3/02 ,  G01J3/0218 ,  G01J3/0245 ,  G01J3/0256 ,  G01J3/06 ,  G01J3/453

    Abstract: A Fourier-Transform Infrared (FTIR) spectrometer for operation in the mid- and long-wave infrared region (about 2-15 micron wavelengths) is disclosed. The FTIR spectrometer is composed of IR-transmitting fiber and uses a broadband IR source. A fiber stretcher is provided to provide a path difference between a first path and a second path having a sample associated therewith. Stretching of the fiber provides a path difference sufficient to generate an interferogram that can subsequently be analyzed to obtain information about a sample. A method for use of the apparatus of the invention is also disclosed. The method involves stretching of an IR-transmitting fiber to create a path difference sufficient to generate an interferogram. Various aspects of these features enable the construction of compact, portable spectrometers.

    Abstract translation: 公开了用于在中长波红外区域（约2-15微米波长）中操作的傅里叶变换红外（FTIR）光谱仪。 FTIR光谱仪由红外发射光纤组成，使用宽带红外线源。 提供纤维拉伸器以提供具有与其相关联的样品的第一路径和第二路径之间的路径差。 纤维的拉伸提供足以产生干涉图的路径差异，随后可以分析干涉图以获得关于样品的信息。 还公开了本发明的装置的使用方法。 该方法涉及拉伸IR发射光纤以产生足以产生干涉图的路径差。 这些特征的各个方面使得能够构造紧凑的便携式光谱仪。

    Broadband or Mid-Infrared Fiber Light Sources
    12.
    发明申请
    Broadband or Mid-Infrared Fiber Light Sources 有权
    宽带或中红外光纤光源

    公开(公告)号：US20090204110A1

    公开(公告)日：2009-08-13

    申请号：US12366323

    申请日：2009-02-05

    Applicant: Mohammed N. Islam

    Inventor： Mohammed N. Islam

    IPC: A61B18/20 ,  H01S3/30 ,  G01B9/02 ,  G01J3/00 ,  H01S3/10

    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: A broadband light source includes one or more laser diodes that are capable of generating a pump signal having a wavelength shorter than 2.5 microns, a pulse width of at least 100 picoseconds and a pump optical spectral width. The light source also includes one or more optical amplifiers that are coupled to the pump signal and are capable of amplifying the pump signal to a peak power of at least 500 W. The light source further includes a first fiber that is coupled to the one or more optical amplifiers. The first fiber including an anomalous group-velocity dispersion regime and a modulational instability mechanism that operates to modulate the pump signal. In one particular embodiment, the pump signal wavelength resides in the anomalous group-velocity dispersion regime of the first fiber and where different intensities in the pump signal can cause relative motion between different parts of the modulated pump signal produced through modulational instability in the first fiber. The light source also including a nonlinear element that is coupled to the first fiber that is capable of broadening the pump optical spectral width to at least 100 nm through a nonlinear effect in the nonlinear element.

    Abstract translation: 宽带光源包括能够产生波长短于2.5微米的泵浦信号，至少100皮秒的脉冲宽度和泵浦光谱宽度的一个或多个激光二极管。 光源还包括耦合到泵浦信号并且能够将泵浦信号放大到至少500W的峰值功率的一个或多个光放大器。光源还包括第一光纤，其耦合到一个或 更多的光放大器。 第一光纤包括异常组 - 速度色散方案和用于调制泵浦信号的调制不稳定机制。 在一个具体实施例中，泵浦信号波长驻留在第一光纤的异常群 - 速度色散方案中，并且其中泵浦信号中的不同强度可引起通过第一光纤中的调制不稳定性产生的调制泵浦信号的不同部分之间的相对运动 。 光源还包括耦合到第一光纤的非线性元件，其能够通过非线性元件中的非线性效应将泵浦光谱宽度扩展至至少100nm。

    FBG sensor interrogation method using semiconductor optical amplifier in ring cavity configuration
    13.
    发明授权
    FBG sensor interrogation method using semiconductor optical amplifier in ring cavity configuration 有权
    FBG传感器询问方法采用半导体光放大器进行环形腔配置

    公开(公告)号：US07266260B2

    公开(公告)日：2007-09-04

    申请号：US11325983

    申请日：2006-01-05

    Applicant: Hwa Yaw Tam ,  Weng Hong Chung

    Inventor： Hwa Yaw Tam ,  Weng Hong Chung

    IPC: G02B6/00 ,  G02B6/34 ,  G01N21/00

    CPC classification number: G01J3/18 ,  G01B11/18 ,  G01J3/0245 ,  G01J3/1895 ,  G01J9/00 ,  H04J14/08

    Abstract: A sensor device that uses a number of bragg grating (FBG) sensors and novel interrogation system with a ring cavity configuration for simultaneous time-division-multiplexex (TDM) and wavelength-division-multiplexed (WDM) interrogation of FBG sensors. The ring cavity includes an amplifier, and output coupler and an optical circulator. The coupler is connected to a wavelength measuring system and the optical circulator is connected to the FBG sensors. The FBG sensors can be in a number of groups. TDM interrogation is applied to each group of FBG sensors while WDM interrogation is applied to each FBG sensors within each group.

    Abstract translation: 一种使用多个布拉格光栅（FBG）传感器和具有环形腔配置的新型询问系统的传感器设备，用于FBG传感器的同时时分复用（TDM）和波分复用（WDM）询问。 环形腔包括放大器，输出耦合器和光循环器。 耦合器连接到波长测量系统，光环行器连接到FBG传感器。 FBG传感器可以在多个组中。 TDM询问应用于每组FBG传感器，而WDM询问应用于每组中的每个FBG传感器。

    BROADBAND OR MID-INFRARED FIBER LIGHT SOURCES
    18.
    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：US20150247756A1

    公开(公告)日：2015-09-03

    申请号：US14715960

    申请日：2015-05-19

    Applicant: OMNI MEDSCI, INC.

    Inventor： Mohammed N. ISLAM

    IPC: G01J3/42 ,  G01J3/02 ,  G01J3/10

    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: A diagnostic system includes a semiconductor light emitter(s) configured to generate an input beam having a wavelength shorter than about 2.5 microns. An optical amplifier(s) configured to receive a portion of the input beam communicates an intermediate beam to an output end of the optical amplifier. An optical fiber(s) configured to receive a portion of the intermediate beam forms an output beam with an associated wavelength. A subsystem having lenses or mirrors receives a received portion of the output beam and delivers a delivered portion of the output beam to a sample. The delivered portion has a temporal duration greater than approximately 30 picoseconds and a repetition rate between continuous wave and Megahertz or higher. A time averaged intensity of the delivered portion is less than approximately 50 MW/cm2. A light detection system collects and analyzes a fraction of the delivered portion that reflects or transmits from the sample.

    Abstract translation: 诊断系统包括配置成产生具有短于约2.5微米的波长的输入束的半导体光发射器。 被配置为接收输入光束的一部分的光放大器将中间光束传送到光放大器的输出端。 被配置为接收中间波束的一部分的光纤形成具有相关波长的输出波束。 具有透镜或反射镜的子系统接收输出光束的接收部分并将输出光束的传送部分传送到样品。 传送部分具有大于约30皮秒的时间持续时间和连续波与兆赫兹或更高之间的重复频率。 输送部分的时间平均强度小于约50MW / cm 2。 光检测系统收集和分析从样品反射或透射的传送部分的一部分。

    Spectroscopy system using waveguide and employing a laser medium as its own emissions detector
    19.
    发明授权
    Spectroscopy system using waveguide and employing a laser medium as its own emissions detector 有权
    使用波导的光谱系统和采用激光介质作为其自身的发射检测器

    公开(公告)号：US09075001B2

    公开(公告)日：2015-07-07

    申请号：US13998751

    申请日：2013-12-03

    Applicant: EMX International, LLC

    Inventor： Daniel Lee Graybeal ,  Alan Carey Rogers

    IPC: G01J5/02 ,  G01N21/3504 ,  G01J3/02 ,  G01J3/10

    CPC classification number: G01J3/10 ,  G01J3/0205 ,  G01J3/021 ,  G01J3/0218 ,  G01J3/0245 ,  G01J3/108 ,  G01J3/42 ,  G01N21/3504 ,  G01N21/39 ,  G01N2021/399 ,  G01N2201/06113 ,  G01N2201/0612 ,  G01N2201/0691 ,  G01N2201/0697 ,  G01N2201/08 ,  H01S5/3401

    Abstract: An intracavity laser absorption infrared spectroscopy system for detecting trace analytes in vapor samples. The system uses a spectrometer in communications with control electronics, wherein the control electronics contain an analyte database that contains absorption profiles for each analyte the system is used to detect. The system can not only detect the presence of specific analytes, but identify them as well. The spectrometer uses a hollow cavity waveguide that creates a continuous loop inside of the device, thus creating a large path length and eliminating the need to mechanically adjust the path length to achieve a high Q-factor. In a preferred embodiment, the laser source may serve as the detector, thus eliminating the need for a separate detector.

    Abstract translation: 用于检测蒸汽样品中痕量分析物的腔内激光吸收红外光谱系统。 该系统使用光谱仪与控制电子设备进行通信，其中控制电子装置包含分析物数据库，其包含用于检测系统的每个分析物的吸收曲线。 该系统不仅可以检测特定分析物的存在，还可以识别它们。 光谱仪使用中空腔波导，其在器件内部产生连续环路，从而产生大的路径长度，并且不需要机械地调节路径长度以实现高Q因子。 在优选实施例中，激光源可以用作检测器，因此不需要单独的检测器。

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