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1. 发明授权

US07085451B2 Optical fiber gratings with azimuthal refractive index perturbation 失效
$Optical fiber gratings with azimuthal refractive index perturbation$
标题翻译：具有方位折射率扰动的光纤光栅
公开(公告)号：US07085451B2
公开(公告)日：2006-08-01
申请号：US11220337
申请日：2005-09-06
申请人： Thomas K. Gaylord , Gregory D. Van Wiggeren , Donald D. Davis , Elias N. Glytsis , Emmanuel Anemogiannis
发明人： Thomas K. Gaylord , Gregory D. Van Wiggeren , Donald D. Davis , Elias N. Glytsis , Emmanuel Anemogiannis
IPC分类号： G02B6/34 , G02B6/02
CPC分类号： G02B6/02085 , G02B6/02142 , G02B6/022
摘要： The present invention relates to a type of optical fiber grating having an azimuthal refractive-index perturbation. The optical fiber includes a fiber grating that has a plurality of grating elements formed therein. At least one of the grating elements has a spatially varying index of refraction that varies azimuthally about the centerline of the optical fiber. The fiber grating acts as a band-stop optical spectral filter. In addition, since fiber-cladding modes are weakly-guided modes, their power can be easily dissipated by scattering, bending, stretching, and/or rotating the optical fiber. Multiple configurations of these gratings within an optical fiber are given. Methodologies are given for the fabrication of these gratings. Devices are presented which can dynamically attenuate, tune, switch, or modulate the wavelength spectral characteristics of an optical signal.
摘要翻译：本发明涉及一种具有方位角折射率扰动的光纤光栅。光纤包括在其中形成有多个光栅元件的光纤光栅。光栅元件中的至少一个具有空间变化的折射率，其围绕光纤的中心线方位改变。光纤光栅用作带阻光谱滤波器。此外，由于光纤包层模式是弱引导模式，它们的功率可以通过散射，弯曲，拉伸和/或旋转光纤而容易地消散。给出光纤内的这些光栅的多种配置。给出了制造这些光栅的方法。可以提供可以动态地衰减，调谐，切换或调制光信号的波长光谱特性的装置。

2. 发明授权

US06832023B1 Optical fiber gratings with azimuthal refractive index perturbation, method of fabrication, and devices for tuning, attenuating, switching, and modulating optical signals 失效
$Optical fiber gratings with azimuthal refractive index perturbation, method of fabrication, and devices for tuning, attenuating, switching, and modulating optical signals$
标题翻译：具有方位角折射率扰动的光纤光栅，制造方法以及用于调谐，衰减，开关和调制光信号的器件
公开(公告)号：US06832023B1
公开(公告)日：2004-12-14
申请号：US09860790
申请日：2001-05-18
申请人： Thomas K. Gaylord , Gregory D. Van Wiggeren , Donald D. Davis , Elias N. Glytsis , Emmanuel Anemogiannis
发明人： Thomas K. Gaylord , Gregory D. Van Wiggeren , Donald D. Davis , Elias N. Glytsis , Emmanuel Anemogiannis
IPC分类号： G02B634
CPC分类号： G02B6/02085 , G02B6/02142 , G02B6/022
摘要： The present invention relates to a type of optical fiber grating having an azimuthal refractive-index perturbation. The optical fiber includes a fiber grating that has a plurality of grating elements formed therein. At least one of the grating elements has a spatially varying index of refraction that varies azimuthally about the centerline of the optical fiber. The fiber grating acts as a band-stop optical spectral filter. In addition, since fiber-cladding modes are weakly-guided modes, their power can be easily dissipated by scattering, bending, stretching, and/or rotating the optical fiber. Multiple configurations of these gratings within an optical fiber are given. Methodologies are given for the fabrication of these gratings. Devices are presented which can dynamically attenuate, tune, switch, or modulate the wavelength spectral characteristics of an optical signal.
摘要翻译：本发明涉及一种具有方位角折射率扰动的光纤光栅。光纤包括在其中形成有多个光栅元件的光纤光栅。光栅元件中的至少一个具有空间变化的折射率，其围绕光纤的中心线方位改变。光纤光栅用作带阻光谱滤波器。此外，由于光纤包层模式是弱引导模式，它们的功率可以通过散射，弯曲，拉伸和/或旋转光纤而容易地消散。给出光纤内的这些光栅的多种配置。给出了制造这些光栅的方法。可以提供可以动态地衰减，调谐，切换或调制光信号的波长光谱特性的装置。

3. 发明授权

US06825934B2 Vibration noise mitigation in an interferometric system 失效
标题翻译：干涉测量系统中的振动噪声抑制
公开(公告)号：US06825934B2
公开(公告)日：2004-11-30
申请号：US10099480
申请日：2002-03-14
申请人： Douglas M. Baney , Gregory D. Van Wiggeren , Ali Motamedi
发明人： Douglas M. Baney , Gregory D. Van Wiggeren , Ali Motamedi
IPC分类号： G01B902
CPC分类号： G01M11/3172 , G01M11/331
摘要： In the measurements of optical characteristics, such as measurements of group delay using an interferometric system, vibration noise can be at least partially offset by providing corrections on the basis of detecting light patterns that are indicative of the vibration noise. In each embodiment, light beams propagating through first and second paths are combined to form an interference signal, which is analyzed to provide the basis for the adjustments.
摘要翻译：在光学特性的测量中，例如使用干涉仪系统的组延迟的测量，可以基于检测指示振动噪声的光图案提供校正来至少部分地偏移振动噪声。在每个实施例中，通过第一和第二路径传播的光束被组合以形成干扰信号，其被分析以提供调整的基础。

4. 发明授权

US06900895B2 Phase noise compensation in an interferometric system 失效
标题翻译：干涉系统中的相位噪声补偿
公开(公告)号：US06900895B2
公开(公告)日：2005-05-31
申请号：US10006490
申请日：2001-12-06
申请人： Gregory D. Van Wiggeren
发明人： Gregory D. Van Wiggeren
IPC分类号： G01B9/02 , G01B11/14 , G01B11/24 , G01N21/00 , G01R29/26
CPC分类号： G01B9/02004 , G01B2290/60
摘要： Phase noise is at least partially cancelled for an interferometric system by using a delay/phase cross-correlation approach for two interferometers within the system. The cross-correlation approach may be used in measuring group delay of a device under test and includes determining the differences between the phase of the output of each interferometer at time t and the phase of the same output at the time t minus the delay of the other interferometer. In one embodiment, the first phase difference is the difference between the phase of a test interferometer output at time t and the phase of the test interferometer output at the time t offset by the known delay of a reference interferometer. The second phase difference is calculated using the same technique, but the time offset is a delay representative of the relative delay of two light propagations within the test interferometer. A noise-cancelled time series output that is indicative of group delay can then be generated by determining the difference between the first and second differences.
摘要翻译：通过对系统内的两个干涉仪使用延迟/相位互相关方法，干涉系统至少部分消除相位噪声。互相关方法可用于测量被测器件的组延迟，并且包括确定在时间t的每个干涉仪的输出相位与在时间t的相同输出的相位之间的差异减去其他干涉仪。在一个实施例中，第一相位差是时间t的测试干涉仪输出的相位与在时间t偏移下的测试干涉仪输出的相位与参考干涉仪的已知延迟之间的差。使用相同的技术计算第二相位差，但是时间偏移是表示测试干涉仪内的两个光传播的相对延迟的延迟。然后可以通过确定第一和第二差异之间的差异来产生指示组延迟的噪声消除时间序列输出。

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