Data conversion system
    1.
    发明授权
    Data conversion system 有权
    数据转换系统

    公开(公告)号:US07924959B2

    公开(公告)日:2011-04-12

    申请号:US11428649

    申请日:2006-07-05

    CPC classification number: H03M1/1245 H03M1/0626

    Abstract: A data conversion system acquires samples of low frequency signal components of an applied analog signal at a first data conversion rate and samples of high frequency signal components of the applied analog signal at a second data conversion rate that is higher than the first data conversion rate. The data conversion system applies a first correction filter to the acquired samples of the low frequency signal components to provide a first filtered signal and applies a second correction filter to the acquired samples of the high frequency signal components to provide a second filtered signal. The data conversion system interpolates the first filtered signal to provide an interpolated signal, and sums the interpolated signal with the second filtered signal to provide an output signal.

    Abstract translation: 数据转换系统以高于第一数据转换速率的第二数据转换速率以第一数据转换速率获取应用的模拟信号的低频信号分量的采样和所应用的模拟信号的高频信号分量的采样。 数据转换系统对所获取的低频信号分量的样本应用第一校正滤波器以提供第一滤波信号,并将第二校正滤波器应用于所获取的高频信号分量的样本,以提供第二滤波信号。 数据转换系统内插第一滤波信号以提供内插信号,并且将内插信号与第二滤波信号相加以提供输出信号。

    DATA CONVERSION SYSTEM
    4.
    发明申请
    DATA CONVERSION SYSTEM 有权
    数据转换系统

    公开(公告)号:US20080007437A1

    公开(公告)日:2008-01-10

    申请号:US11428649

    申请日:2006-07-05

    CPC classification number: H03M1/1245 H03M1/0626

    Abstract: A data conversion system acquires samples of low frequency signal components of an applied analog signal at a first data conversion rate and samples of high frequency signal components of the applied analog signal at a second data conversion rate that is higher than the first data conversion rate. The data conversion system applies a first correction filter to the acquired samples of the low frequency signal components to provide a first filtered signal and applies a second correction filter to the acquired samples of the high frequency signal components to provide a second filtered signal. The data conversion system interpolates the first filtered signal to provide an interpolated signal, and sums the interpolated signal with the second filtered signal to provide an output signal.

    Abstract translation: 数据转换系统以高于第一数据转换速率的第二数据转换速率以第一数据转换速率获取应用的模拟信号的低频信号分量的采样和所应用的模拟信号的高频信号分量的采样。 数据转换系统对所获取的低频信号分量的样本应用第一校正滤波器以提供第一滤波信号,并将第二校正滤波器应用于所获取的高频信号分量的样本,以提供第二滤波信号。 数据转换系统内插第一滤波信号以提供内插信号,并且将内插信号与第二滤波信号相加以提供输出信号。

    Wavelength reference standard using multiple gases
    5.
    发明授权
    Wavelength reference standard using multiple gases 失效
    使用多种气体的波长参考标准

    公开(公告)号:US06249343B1

    公开(公告)日:2001-06-19

    申请号:US09429052

    申请日:1999-10-29

    CPC classification number: G01N21/3504 G01J3/28 G01J2003/2866 G01N21/274

    Abstract: Wavelength reference standard using multiple gasses and calibration methods using same. A wavelength reference using absorption lines of multiple gasses provides stable reference wavelengths over multiple regions of interest of the optical spectrum. The gasses may be in separate cells or combined in one cell. Improved calibration using the reference is achieved by performing calibration measurements at a plurality of known wavelengths and using an average calibration constant derived from the plurality of measurements. In a second embodiment, improved calibration is achieved by performing calibration measurements at a plurality of known wavelengths and calculating a higher order calibration model, such as a least-squares linear fit. Both approached may be extended by segmenting the wavelength range and using calculated calibration values for each segment.

    Abstract translation: 使用多种气体的波长参考标准和使用相同的校准方法。 使用多个气体的吸收线的波长参考在光谱的多个感兴趣区域上提供稳定的参考波长。 气体可以在单独的单元中或在一个单元中组合。 使用参考的改进的校准是通过在多个已知波长下执行校准测量并使用从多个测量得到的平均校准常数来实现的。 在第二实施例中,通过在多个已知波长下执行校准测量并计算诸如最小二乘线性拟合的较高阶校准模型来实现改进的校准。 可以通过分割波长范围并使用每个段的计算校准值来扩展两者。

    Extended wavelength calibration reference
    6.
    发明授权
    Extended wavelength calibration reference 失效
    扩展波长校准参考

    公开(公告)号:US06421120B1

    公开(公告)日:2002-07-16

    申请号:US09430554

    申请日:1999-10-29

    CPC classification number: G01J3/28 G01N21/274

    Abstract: Optical wavelength reference apparatus with wide wavelength range. Illuminated by a wideband source, a first reference such as absorption lines in a gas cell is used as a transfer standard, calibrating the response of the secondary reference over the range of the first reference. The performance of the second reference is extrapolated to a wider wavelength range, retaining the stability and accuracy characteristics of the first reference. Suitable secondary devices include etalons such as Fabry-Perot filters and Mach-Zehnder interferometers.

    Abstract translation: 具有宽波长范围的光波长参考装置。 通过宽带源照明,使用第一参考例如气室中的吸收线作为转移标准,在第一参考的范围上校准次参考的响应。 将第二参考的性能外推到更宽的波长范围,保持第一参考的稳定性和精度特性。 合适的次级装置包括标准具,例如法布里 - 珀罗滤波器和马赫 - 曾德尔干涉仪。

    Diffraction grating position sensing and control for a scanning
monochromator
    7.
    发明授权
    Diffraction grating position sensing and control for a scanning monochromator 失效
    扫描单色仪的衍射光栅位置检测和控制

    公开(公告)号:US5359409A

    公开(公告)日:1994-10-25

    申请号:US98559

    申请日:1993-07-28

    Abstract: A double-pass scanning monochromator for use in an optical spectrum analyzer includes an input optical fiber for emitting an input light beam, a diffraction grating for diffracting the input light beam to produce a spatially dispersed light beam, a slit for passing a selected portion of the dispersed light beam, a motor for rotating the diffraction grating, a shaft angle encoder for sensing grating position, and an output optical fiber. The light that passes through the slit is directed to the diffraction grating and is recombined by the diffraction grating to produce an output light beam. The light beam to be analyzed is incident on the diffraction grating during first and second passes. A polarization rotation device rotates the polarization components of the light beam by 90.degree. between the first and second passes so that the output of the monochromator is independent of the polarization of the input light beam. The output optical fiber is translated by a micropositioning assembly in a plane perpendicular to the output light beam during rotation of the diffraction grating to automatically track the output light beam and to provide optical chopping.

    Abstract translation: 用于光谱分析仪的双通扫描单色仪包括用于发射输入光束的输入光纤,用于衍射输入光束以产生空间分散的光束的衍射光栅,用于使所选择的部分通过的狭缝 分散的光束,用于旋转衍射光栅的电动机,用于感测光栅位置的轴角编码器和输出光纤。 通过狭缝的光被引导到衍射光栅,并且被衍射光栅重新组合以产生输出光束。 要分析的光束在第一次和第二次通过期间入射到衍射光栅上。 偏振旋转装置在第一和第二遍之间使光束的偏振分量旋转90°,使得单色仪的输出与输入光束的偏振无关。 在衍射光栅旋转期间,输出光纤由垂直于输出光束的平面中的微定位组件平移,以自动跟踪输出光束并提供光学切割。

    Optical spectrum analyzer having double-pass monochromator
    8.
    发明授权
    Optical spectrum analyzer having double-pass monochromator 失效
    具有双通道单色显示器的光谱分析仪

    公开(公告)号:US5233405A

    公开(公告)日:1993-08-03

    申请号:US788444

    申请日:1991-11-06

    Abstract: A double pass scanning monochromator for use in an optical spectrum analyzer includes an input optical fiber for emitting an input light beam, a diffraction grating for diffracting the input light beam to produce a spatially dispersed light beam, a slit for passing a selected portion of the dispersed light beam, a motor for rotating the diffraction grating, a shaft angle encoder for sensing grating position, and an output optical fiber. The light that passes through the slit is directed to the diffraction grating and is recombined by the diffraction grating to produce an output light beam. The light beam to be analyzed is incident on the diffraction grating during first and second passes. A polarization rotation device rotates the polarization components of the light beam by 90.degree. between the first and second passes so that the output of the monochromator is independent of the polarization of the input light beam. The output optical fiber is translated by a micropositioning assembly in a plane perpendicular to the output light beam during rotation of the diffraction grating to automatically track the output light beam and to provide optical chopping.

    Method and apparatus to improve the dynamic range of optical devices using spatial apodization
    9.
    发明授权
    Method and apparatus to improve the dynamic range of optical devices using spatial apodization 失效
    使用空间变迹改善光学器件的动态范围的方法和装置

    公开(公告)号:US07280206B2

    公开(公告)日:2007-10-09

    申请号:US10939673

    申请日:2004-09-13

    CPC classification number: G02B27/58

    Abstract: Devices and methods for processing multi-wavelength light beams and the single-wavelength components of such light beams are disclosed. In accordance with some embodiments, a spectral filter includes collimating and focusing optical elements, an apodizing filter, a diffraction grating, and a spatial filter. The collimating optical element collimates an input light beam while the apodizing filter spatially filters this beam. In general, the apodizing filter includes a range of transmissivity that varies according to a distance from a predetermined location on the apodizing filter. The diffraction grating diffracts the input beam which is focused by the focusing optical element onto the spatial filter to generate a filtered output beam. Embodiments of the invention may be employed as spectral filters, optical spectrum analyzers, optical mutiplexers, optical de-multiplexers, and the like.

    Abstract translation: 公开了用于处理多波长光束的装置和方法以及这种光束的单波长分量。 根据一些实施例,光谱滤波器包括准直和聚焦光学元件,变迹滤波器,衍射光栅和空间滤波器。 准直光学元件准直输入光束,而变迹滤光器对该光束进行空间滤光。 通常,变迹滤波器包括根据与变迹滤波器上的预定位置的距离而变化的透射率范围。 衍射光栅将由聚焦光学元件聚焦的输入光束衍射到空间滤光片上,以产生滤波后的输出光束。 本发明的实施例可以用作光谱滤波器,光谱分析仪,光学多路复用器,光学解复用器等。

    Apparatus and method for shifting the frequency of an optical signal by two-stage Raman scattering
    10.
    发明授权
    Apparatus and method for shifting the frequency of an optical signal by two-stage Raman scattering 失效
    通过两级拉曼散射来移位光信号的频率的装置和方法

    公开(公告)号:US07016102B2

    公开(公告)日:2006-03-21

    申请号:US10795034

    申请日:2004-03-05

    CPC classification number: H01S3/302 H01S3/08086

    Abstract: An apparatus for optically shifting the frequency of an input signal beam includes a first Raman medium that receives an input signal beam, a first pump beam, and a first reference beam to responsively generate an intermediate signal beam comprising a Raman sideband of the first Raman medium. A second Raman medium is optically coupled in series with the first Raman medium. The second Raman medium receives the intermediate signal beam, a second pump beam, and a second reference beam to responsively generate an output signal beam comprising a Raman sideband of the second Raman medium. The generated output signal represents the input signal that is shifted in frequency by a frequency shift that corresponds to the frequency difference between the first and second reference beams.

    Abstract translation: 一种用于光学偏移输入信号光束的频率的装置包括接收输入信号光束的第一拉曼介质,第一泵浦光束和第一参考光束,以响应地产生包括第一拉曼介质的拉曼边带的中间信号光束 。 第二拉曼介质与第一拉曼介质串联光耦合。 第二拉曼介质接收中间信号光束,第二泵浦光束和第二参考光束,以响应地产生包括第二拉曼介质的拉曼边带的输出信号光束。 所生成的输出信号表示频率偏移与第一和第二参考光束之间的频率差对应的频移的输入信号。

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