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公开(公告)号：US5463312A
公开(公告)日：1995-10-31
申请号：US205899
申请日：1994-03-03
申请人： Dale R. Lutz , Trevor W. MacDougall , William L. Taylor , Wayne F. Varner , Robert A. Wandmacher
发明人： Dale R. Lutz , Trevor W. MacDougall , William L. Taylor , Wayne F. Varner , Robert A. Wandmacher
IPC分类号： G01R15/24 , G01R33/032 , G02B6/02 , G01R1/04
CPC分类号： G01R33/032 , G01R15/246
摘要： A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.
摘要翻译： 光纤，法拉第效应感测线圈具有非常低的线性和圆形双折射，其在宽的温度范围内保持稳定。 线圈由具有100米以上的有效线性拍子长度的纺丝纤维制成，并且在形成为线圈之后进行退火。 线圈已经改善了与载流电缆相关联的磁场的区分，并且可以被并入到光学电流传感器（OCT）中，无论是干涉测量还是偏振测量。
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2.发明授权Faraday-effect sensing coil with stable birefringence and method of making same 失效具有稳定双折射的法拉第效应感测线圈及其制造方法
公开(公告)号：US5553173A
公开(公告)日：1996-09-03
申请号：US393413
申请日：1995-02-23
申请人： Dale R. Lutz , Trevor W. MacDougall , William L. Taylor , Wayne F. Varner , Robert A. Wandmacher
发明人： Dale R. Lutz , Trevor W. MacDougall , William L. Taylor , Wayne F. Varner , Robert A. Wandmacher
CPC分类号： G01R33/032 , G01R15/246
摘要： A fiber optic, Faraday-effect sensing coil has very low linear and circular birefringence, which remains stable over a wide range of temperatures. The coil is fabricated from a spun fiber having an effective linear beat length of 100 meters or more, and is annealed after being formed into the coil. The coil has improved discrimination for magnetic fields associated with electric current-carrying cables, and may be incorporated into an optical current transducer (OCT), either interferometric or polarimetric.
摘要翻译： 光纤，法拉第效应感测线圈具有非常低的线性和圆形双折射，其在宽的温度范围内保持稳定。 线圈由具有100米以上的有效线性拍子长度的纺丝纤维制成，并且在形成为线圈之后进行退火。 线圈已经改善了与载流电缆相关联的磁场的区分，并且可以被并入到光学电流传感器（OCT）中，无论是干涉测量还是偏振测量。
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公开(公告)号：US5570449A
公开(公告)日：1996-10-29
申请号：US407188
申请日：1995-03-21
CPC分类号： G02B6/2551 , C03B37/15 , G02B6/3628 , G02B6/3636 , G02B6/3684
摘要： A holder for annealing a fiber optic coil uses a silica ring on a silica substrate, or silica tubular coil, either of which may be directly incorporated into a coil subassembly for a Faraday-effect current sensor. The ring may be formed in a silica plate by sandblasting or grinding, or formed separately and adhered to the plate. In the tubular holder embodiment, silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.
摘要翻译： 用于退火光纤线圈的保持器使用二氧化硅衬底上的二氧化硅环或二氧化硅管状线圈，其中任一个可以直接并入用于法拉第效应电流传感器的线圈子组件中。 环可以通过喷砂或研磨在二氧化硅板中形成，或者单独形成并粘附到板上。 在管状保持器实施例中，使用石英管和套管来保护纤维线圈的端部和偏振纤维之间的熔接。 大多数子组件部件使用二氧化硅将子组件的热膨胀系数与纤维线圈的热膨胀系数相匹配，并且还允许线圈在极高温度下退火。 退火产生具有降低的双折射的纤维线圈，特别是当与纺丝纤维一起使用时。 套圈用于调整纤维相对于它们的极化平面的角取向。
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4.发明授权Method of annealing a fiber within a coiled tube to thereby make a fiber coil for a Faraday-effect current-sensor 失效在线圈管内退火纤维的方法，从而制成用于法拉第效应电流传感器的纤维线圈
公开(公告)号：US5645622A
公开(公告)日：1997-07-08
申请号：US407905
申请日：1995-03-21
IPC分类号： G01R15/24 , C03B37/15 , G02B6/00 , G02B6/02 , G02B6/255 , G02B6/36 , C03B23/20 , C03B23/00 , C03B37/00
CPC分类号： G02B6/2551 , C03B37/15 , G02B6/3628 , G02B6/3636 , G02B6/3684
摘要： Silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.
摘要翻译： 二氧化硅管和套管用于保护纤维线圈端部和极化纤维之间的熔接。 大多数子组件部件使用二氧化硅将子组件的热膨胀系数与纤维线圈的热膨胀系数相匹配，并且还允许线圈在极高温度下退火。 退火产生具有降低的双折射的纤维线圈，特别是当与纺丝纤维一起使用时。 套圈用于调整纤维相对于它们的极化平面的角取向。
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公开(公告)号：US5492552A
公开(公告)日：1996-02-20
申请号：US205880
申请日：1994-03-03
CPC分类号： G02B6/2551 , C03B37/15 , G02B6/3628 , G02B6/3636 , G02B6/3684
摘要： A holder for annealing a fiber optic coil uses a silica ring on a silica substrate, or silica tubular coil, either of which may be directly incorporated into a coil subassembly for a Faraday-effect current sensor. The ring may be formed in a silica plate by sandblasting or grinding, or formed separately and adhered to the plate. In the tubular holder embodiment, silica tubes and sleeves are used to protect fusion splices between the ends of the fiber coil and polarizing fibers. Use of silica for most of the subassembly components matches the coefficients of thermal expansion of the subassembly to that of the fiber coil, and also allows the coil to be annealed at extremely high temperatures. Annealing yields fiber coils of lowered birefringence, particularly when used with spun fibers. Ferrules are used to adjust the angular orientation of the fibers with respect to their planes of polarization.
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公开(公告)号：US08070369B2
公开(公告)日：2011-12-06
申请号：US10755708
申请日：2004-01-12
申请人： Mark R. Fernald , Trevor W. MacDougall , Martin A. Putnam , Rebecca S. Bryant , Christopher J. Wright , Michael Arcand , Christopher T. Chipman
发明人： Mark R. Fernald , Trevor W. MacDougall , Martin A. Putnam , Rebecca S. Bryant , Christopher J. Wright , Michael Arcand , Christopher T. Chipman
CPC分类号： G02B6/2551
摘要： Techniques and systems suitable for performing low-loss fusion splicing of optical waveguide sections are provided. According to some embodiments, multiple laser beams (from one or more laser) may be utilized to uniformly heat a splice region including portions of the optical waveguide sections to be spliced, which may have different cross-sectional dimensions. According to some embodiments, the relative distance of the optical waveguide sections and/or the power of the multiple laser beams may be varied during splicing operations.
摘要翻译： 提供了适合于执行光波导部分的低损耗熔接的技术和系统。 根据一些实施例，可以使用多个激光束（来自一个或多个激光器）来均匀地加热包括可以具有不同横截面尺寸的要拼接的光波导部分的部分的接合区域。 根据一些实施例，可以在拼接操作期间改变光波导部分的相对距离和/或多个激光束的功率。
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7.发明授权Method for restoring or increasing photosensitivity in hydrogen or deuterium loaded large diameter optical waveguide 有权在氢或氘负载的大直径光波导中恢复或增加光敏性的方法公开(公告)号：US07068897B2
公开(公告)日：2006-06-27
申请号：US10459653
申请日：2003-06-10
IPC分类号： G02B6/02
CPC分类号： G02B6/02133 , G02B5/1857 , G02B6/02114 , G02B6/02123
摘要： The present invention provides a new and unique method for increasing the photosensitivity of a large diameter optical waveguide having a cross-section of at least about 0.3 millimeters. The method features loading the large diameter optical waveguide with a photosensitizing gas at a pressure at least about 4000 pounds per square inch (PSI) at a temperature of at least about 250E Celsius. The photosensitizing gas may be hydrogen, Deuterium or other suitable gas. The method also includes the step of using a particular large diameter optical waveguide having a diameter of greater than 0.9 millimeters. The method may be used as part of a process for writing a Bragg grating in an inner core or a cladding of the large diameter optical waveguide.
摘要翻译： 本发明提供了一种增加具有至少约0.3毫米横截面的大直径光波导的光敏性的新颖且独特的方法。 该方法特征是在至少约250摄氏度的温度下，在至少约4000磅/平方英寸（PSI）的压力下加载具有光敏气体的大直径光波导。 光敏气体可以是氢气，氘气或其它合适的气体。 该方法还包括使用直径大于0.9毫米的特定大直径光波导的步骤。 该方法可以用作在大直径光波导的内芯或包层中写入布拉格光栅的过程的一部分。
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公开(公告)号：US5780847A
公开(公告)日：1998-07-14
申请号：US822894
申请日：1997-03-24
CPC分类号： G01R15/246
摘要： A fiber optic, Faraday-effect current sensor (optical current transducer) which has improved temperature sensitivity due to compensation for temperature-induced variations of the Verdet constant. Fiber optic sensing coils can exhibit shifts in their bias angle due to a number of reasons, including physical rotation of the fibers, an apparent circular birefringence attributable to the sensing coil shape (Berry's phase), circular birefringence in the sensing fiber, or a DC magnetic field or current. The present invention takes advantage of the change in bias angle by identifying a preferred channel from the two sensing axes of the output fiber, based on the manner in which these axes respond to the change in bias angle. One of the axes will exhibit a change in sensitivity that exacerbates the change in sensitivity due to the Verdet constant, while the other channel will exhibit a change that complements, or compensates for, the change in sensitivity due to the Verdet constant. Once the preferred channel is identified, a polarizing fiber is attached to the output of the sensing coil, aligned to transmit the preferred channel to the optical detector.
摘要翻译： 一种光纤，法拉第效应电流传感器（光电流传感器），由于对温度引起的Verdet常数的变化的补偿而具有改善的温度灵敏度。 由于许多原因，光纤感测线圈可能会出现偏移角偏移，包括纤维的物理旋转，归因于感测线圈形状（Berry's phase）的表观圆形双折射，感测光纤中的圆形双折射或DC 磁场或电流。 本发明通过基于这些轴对偏置角的改变的方式来识别来自输出光纤的两个感测轴的优选通道来利用偏置角的变化。 其中一个轴会出现灵敏度的变化，这会加剧由于Verdet常数导致的灵敏度变化，而另一个通道会出现由于Verdet常数而导致的灵敏度变化的补偿或补偿。 一旦识别出优选的通道，偏振光纤被附着到感测线圈的输出端，对准以将优选的通道传送到光学检测器。
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9.发明申请公开(公告)号：US20090310925A1
公开(公告)日：2009-12-17
申请号：US12251334
申请日：2008-10-14
IPC分类号： G02B6/036 , G02B6/02 , C03B37/023 , G02B6/032 , G02B6/028
CPC分类号： C03B37/02709 , C03B2201/02 , C03B2201/10 , C03B2201/12 , C03B2201/31 , C03B2203/12 , C03B2203/224 , C03B2203/30 , G01C19/721 , G02B6/024
摘要： Methods and apparatus provide for birefringent waveguides suitable for optical systems exhibiting polarization dependence such as interferometer sensors including Sagnac interferometric fiber optic gyroscopes (IFOG). The waveguides, for some embodiments, may offer single polarization performance over lengths of about a kilometer or more due to polarization dependent attenuation. According to some embodiments, the waveguides incorporate a pure silica core for resistance to radiation-induced attenuation (RIA).
摘要翻译： 方法和装置提供适用于呈现偏振相关性的光学系统的双折射波导，例如包括Sagnac干涉光纤陀螺仪（IFOG）的干涉仪传感器。 对于一些实施例，波导可以由于偏振相关衰减而提供长度大约一公里或更长的单极化性能。 根据一些实施例，波导包含用于抵抗辐射诱导衰减（RIA）的纯二氧化硅芯。
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10.发明申请公开(公告)号：US20080151254A1
公开(公告)日：2008-06-26
申请号：US11614606
申请日：2006-12-21
IPC分类号： G02B6/024 , C03B37/022 , G01C19/64
CPC分类号： C03B37/02709 , C03B2201/02 , C03B2201/10 , C03B2201/12 , C03B2201/31 , C03B2203/12 , C03B2203/224 , C03B2203/30 , G01C19/721 , G02B6/024
摘要： Methods and apparatus provide for birefringent waveguides suitable for optical systems exhibiting polarization dependence such as interferometer sensors including Sagnac interferometric fiber optic gyroscopes (IFOG). The waveguides, for some embodiments, may offer single polarization performance over lengths of about a kilometer or more due to polarization dependent attenuation. According to some embodiments, the waveguides incorporate a pure silica core for resistance to radiation-induced attenuation (RIA).
摘要翻译： 方法和装置提供适用于呈现偏振相关性的光学系统的双折射波导，例如包括Sagnac干涉光纤陀螺仪（IFOG）的干涉仪传感器。 对于一些实施例，波导可以由于偏振相关衰减而提供长度大约一公里或更长的单极化性能。 根据一些实施例，波导包含用于抵抗辐射诱导衰减（RIA）的纯二氧化硅芯。
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