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    High spectral resolution fiber optic spectrometer
    5.
    发明授权
    High spectral resolution fiber optic spectrometer 失效
    高光谱分辨率光纤光谱仪

    公开(公告)号：US5619332A

    公开(公告)日：1997-04-08

    申请号：US440637

    申请日：1995-05-15

    Applicant: James E. Nicholson

    Inventor： James E. Nicholson

    IPC: G01J3/12 ,  G01J7/00 ,  G01J9/00 ,  G01J9/02 ,  G01J3/51

    CPC classification number: G01J9/0246 ,  G01J2009/0226

    Abstract: An incident optical signal is captured by an array of apertures and directed to pairs of fibers, each pair having a delay fiber with a unique length and a no-delay fiber. Each pair of fibers further has a unique transmission characteristic. Time interpolation is then performed using the transmission characteristic curve for each delay fiber and the duration from the time the optical signal arrives over the no-delay fibers and the time the signal arrives over the delay fibers to determine the wavelength. In a second embodiment, each pair of delay and no-delay fibers is replaced by a fiber splitter which directs light into a no-delay fiber and a delay fiber that have been split from the input of the splitter. In a third embodiment, two fiber splitters are used in place of the pairs of fibers. Each splitter has a number of branches for receiving light and an output end for guiding light onto the photodetectors. The propagation time of the delay optical signal, as compared against the no-delay signal, and other factors such as the length of the individual fiber and the transmission characteristics, are used to determine the wavelength.

    Abstract translation: 入射光信号由一组孔径捕获并被引导到一对光纤，每对光纤具有一个具有唯一长度的延迟光纤和一个无延迟光纤。 每对纤维还具有独特的传输特性。 然后使用每个延迟光纤的传输特性曲线和从光信号到达无延迟光纤时的持续时间和信号到达延迟光纤的时间来确定波长来执行时间插值。 在第二实施例中，每对延迟和无延迟光纤由光纤分离器代替，光纤分离器将光引导到已经从分离器的输入分离的无延迟光纤和延迟光纤。 在第三实施例中，使用两根光纤分离器代替成对的光纤。 每个分离器具有用于接收光的多个分支和用于将光引导到光电检测器上的输出端。 使用与无延迟信号相比的延迟光信号的传播时间以及诸如单个光纤的长度和传输特性的其他因素来确定波长。

    Optical interferometer with squeezed vacuum and reduced guided-acoustic-wave brillouin scattering noise
    6.
    发明授权
    Optical interferometer with squeezed vacuum and reduced guided-acoustic-wave brillouin scattering noise 失效
    光学干涉仪具有挤压真空和降低的引导声波布里渊散射噪声

    公开(公告)号：US5535000A

    公开(公告)日：1996-07-09

    申请号：US211906

    申请日：1994-08-22

    Applicant: Masataka Shirasaki

    Inventor： Masataka Shirasaki

    IPC: G01J9/02 ,  G02F1/21 ,  G02F1/35 ,  G01B9/02

    CPC classification number: G01J9/02 ,  G02F1/3519 ,  G01J2009/0226 ,  G02F2001/211

    Abstract: An interferometric measurement scheme utilizing squeezed light wherein an input pulse is split into two consecutive input pulses separated by a time interval that is less than the inverse spectral width of GAWBS. The two pulses are further split into first and second pairs of pulses and are caused to propagate in opposite directions through a fiber optic interferometer loop and are recombined upon exiting the loop. The recombined pulses are caused to pass through a .pi. phase modulator which modulates one of the two pulses. The output is then introduced to a balanced detector where the detected signal of the two is averaged such that GAWBS noise is cancelled.

    Abstract translation: PCT No.PCT / US93 / 01421 Sec。 371日期1994年8月22日 102（e）日期1994年8月22日PCT提交1993年2月17日PCT公布。 公开号WO94 / 05967 日期：1994年3月17日。使用挤压光的干涉测量方案，其中输入脉冲被分成两个连续输入脉冲，间隔时间间隔小于GAWBS的反频谱宽度。 两个脉冲进一步分成第一和第二对脉冲，并且通过光纤干涉仪环路在相反方向上传播，并且在离开环路时被重组。 使重新组合的脉冲通过调制两个脉冲之一的pi相位调制器。 然后将输出引入平衡检测器，其中两者的检测信号被平均，使得GAWBS噪声被消除。

    Sensor using fiber interferometer
    7.
    再颁专利
    Sensor using fiber interferometer 失效
    传感器采用光纤干涉仪

    公开(公告)号：USRE34604E

    公开(公告)日：1994-05-10

    申请号：US589061

    申请日：1990-09-26

    Applicant: Herbert J. Shaw

    Inventor： Herbert J. Shaw

    IPC: G01D5/353 ,  G01H9/00 ,  G01J9/02 ,  G01B9/02

    CPC classification number: G01D5/35303 ,  G01H9/004 ,  G01J9/02 ,  G01J2009/0226

    Abstract: A closed loop optical fiber interferometer is used in sensing a quantity, Q, by applying a time varying or modulated measure of, Q, asymmetrically to the closed loop (24) and detecting phase shift between two counterpropagating optical signals in the closed loop. The closed loop (24) can be used in the sensing element or a separate sensor (68, 70) can develop a time varying signal which is then applied to the closed loop interferometer.

    Abstract translation: 闭环光纤干涉仪用于通过对闭环（24）不对称地应用时变或调制测量Q来检测数量Q，并检测闭环中两个反向传播光信号之间的相移。 闭环（24）可以用在感测元件中，或者单独的传感器（68,70）可以产生随后施加到闭环干涉仪的时变信号。

    Apparatus for imparting phase shift to input waveform
    10.
    发明授权
    Apparatus for imparting phase shift to input waveform 有权
    用于给输入波形赋予相移的装置

    公开(公告)号：US09323284B2

    公开(公告)日：2016-04-26

    申请号：US13124305

    申请日：2009-10-14

    Applicant: Mark Foster ,  Alexander Gaeta ,  David Geraghty ,  Michal Lipson ,  Reza Salem ,  Amy Foster

    Inventor： Mark Foster ,  Alexander Gaeta ,  David Geraghty ,  Michal Lipson ,  Reza Salem ,  Amy Foster

    IPC: G01J9/00 ,  G06E3/00 ,  G01J11/00 ,  G01J9/02 ,  G02B27/46

    CPC classification number: G06E3/003 ,  G01J9/00 ,  G01J11/00 ,  G01J2009/0226 ,  G02B27/46

    Abstract: There is set forth in one embodiment an apparatus and method for imparting a phase shift to an input waveform for output of a converted waveform. In one embodiment, a phase shift can be provided by four wave mixing of an input waveform and a pump pulse. In one embodiment, there is set forth an apparatus and method for generating a high resolution time domain representation of an input waveform comprising: dispersing the input waveform to generate a dispersed input waveform; subjecting the dispersed input waveform to four wave mixing by combining the dispersed input waveform with a dispersed pump pulse to generate a converted waveform; and presenting the converted waveform to a detector unit. In one embodiment a detector unit can include a spectrometer (spectrum analyzer) for recording of the converted waveform and output of a record representing the input waveform.

    Abstract translation: 在一个实施例中提出了一种用于向输入波形施加相移以输出转换波形的装置和方法。 在一个实施例中，可以通过输入波形和泵浦脉冲的四次波混合来提供相移。 在一个实施例中，提出了一种用于产生输入波形的高分辨率时域表示的装置和方法，包括：分散输入波形以产生分散的输入波形; 通过将分散的输入波形与分散的泵浦脉冲组合来对分散的输入波形进行四波混频以产生转换的波形; 并将转换的波形呈现给检测器单元。 在一个实施例中，检测器单元可以包括用于记录转换的波形的光谱仪（频谱分析仪）和表示输入波形的记录的输出。

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