专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08335405B2 Method and apparatus for measuring fiber twist by polarization tracking 有权
标题翻译：通过极化跟踪测量纤维捻度的方法和装置
公开(公告)号：US08335405B2
公开(公告)日：2012-12-18
申请号：US12614309
申请日：2009-11-06
申请人： Charles G Askins
发明人： Charles G Askins
IPC分类号： G02B6/00 , G02B6/34 , G01J3/28 , G01J4/00
CPC分类号： G01M11/088 , G01D5/344 , G01D5/35316 , G01D5/35354 , G01M11/3181 , G02B6/274 , G02B6/29319
摘要： An apparatus and accompanying method to measure fiber twist. The method includes independent determination of fiber bending by measuring strain sensing in outer cores of the same fiber. The apparatus includes a multi-core optical fiber comprising a center core and a plurality of peripheral cores at a distance radially from the center core and running parallel to the center core. The center core includes at least one fiber Bragg grating with polarization-dependent reflectivity. The fiber Bragg grating reflects the launched light as reflected light. The apparatus includes a multi-core optical fiber bend sensing system operable to communicate with the multi-core optical fiber. The multi-core optical fiber bend sensing system is operable to sense a bend in the multi-core optical fiber. The apparatus includes a processor operable to communicate with the polarization controller. The apparatus includes a polarization vector analyzer operable to communicate electronically with the processor, and optically with a portion of the light launched into the central core of the optical fiber. The polarization vector analyzer is operable to measure the state of polarization of the launched light. The polarization controller is operable to align the polarization of the launched light with the minor axis or the major axis of birefringence of the FBG. The processor is operable, after the polarization controller aligns the polarization of the launched light, to determine a twist in the multi-core optical fiber based on the polarization of the launched light and the bend in the multi-core optical fiber.
摘要翻译：一种测量纤维捻度的装置和附带方法。该方法通过测量同一纤维的外芯中的应变感测来独立确定纤维弯曲。该装置包括多芯光纤，其包括中心芯和与中心芯径向相距一定距离且平行于中心芯延伸的多个外围芯。中心芯包括至少一个具有偏振相关反射率的光纤布拉格光栅。光纤布拉格光栅将发射的光作为反射光反射。该装置包括可操作以与多芯光纤通信的多芯光纤弯曲感测系统。多核光纤弯曲传感系统可操作以感测多芯光纤中的弯曲。该装置包括可操作以与偏振控制器通信的处理器。该装置包括可操作以与处理器电子通信的偏振矢量分析仪，并且光学地将一部分光发射到光纤的中心芯中。偏振矢量分析器可操作以测量发射光的偏振状态。偏振控制器可操作以将发射光的偏振与FBG的双轴折射的短轴或长轴对准。在偏振控制器对准发射光的偏振之后，处理器可操作，以基于发射光的偏振和多芯光纤中的弯曲来确定多芯光纤中的扭曲。

2. 发明申请

US20100158433A1 METHOD AND APPARATUS FOR MEASURING FIBER TWIST BY POLARIZATION TRACKING 有权
标题翻译：用于通过偏振跟踪测量光纤的方法和装置
公开(公告)号：US20100158433A1
公开(公告)日：2010-06-24
申请号：US12614309
申请日：2009-11-06
申请人： CHARLES G. ASKINS
发明人： CHARLES G. ASKINS
IPC分类号： G02B6/00 , G01J3/28
CPC分类号： G01M11/088 , G01D5/344 , G01D5/35316 , G01D5/35354 , G01M11/3181 , G02B6/274 , G02B6/29319
摘要： An apparatus and accompanying method to measure fiber twist. The method includes independent determination of fiber bending by measuring strain sensing in outer cores of the same fiber. The apparatus includes a multi-core optical fiber comprising a center core and a plurality of peripheral cores at a distance radially from the center core and running parallel to the center core. The center core includes at least one fiber Bragg grating with polarization-dependent reflectivity. The fiber Bragg grating reflects the launched light as reflected light. The apparatus includes a multi-core optical fiber bend sensing system operable to communicate with the multi-core optical fiber. The multi-core optical fiber bend sensing system is operable to sense a bend in the multi-core optical fiber. The apparatus includes a processor operable to communicate with the polarization controller. The apparatus includes a polarization vector analyzer operable to communicate electronically with the processor, and optically with a portion of the light launched into the central core of the optical fiber. The polarization vector analyzer is operable to measure the state of polarization of the launched light. The polarization controller is operable to align the polarization of the launched light with the minor axis or the major axis of birefringence of the FBG. The processor is operable, after the polarization controller aligns the polarization of the launched light, to determine a twist in the multi-core optical fiber based on the polarization of the launched light and the bend in the multi-core optical fiber.
摘要翻译：一种测量纤维捻度的装置和附带方法。该方法通过测量同一纤维的外芯中的应变感测来独立确定纤维弯曲。该装置包括多芯光纤，其包括中心芯和与中心芯径向相距一定距离且平行于中心芯延伸的多个外围芯。中心芯包括至少一个具有偏振相关反射率的光纤布拉格光栅。光纤布拉格光栅将发射的光作为反射光反射。该装置包括可操作以与多芯光纤通信的多芯光纤弯曲感测系统。多核光纤弯曲传感系统可操作以感测多芯光纤中的弯曲。该装置包括可操作以与偏振控制器通信的处理器。该装置包括可操作以与处理器电子通信的偏振矢量分析仪，并且光学地将一部分光发射到光纤的中心芯中。偏振矢量分析器可操作以测量发射光的偏振状态。偏振控制器可操作以将发射光的偏振与FBG的双轴折射的短轴或长轴对准。在偏振控制器对准发射光的偏振之后，处理器可操作，以基于发射光的偏振和多芯光纤中的弯曲来确定多芯光纤中的扭曲。

3. 发明授权

US06233373B1 Optical spectrometer with improved geometry and data processing for monitoring fiber optic bragg gratings 失效
标题翻译：具有改进的几何形状和数据处理用于监测光纤布拉格光栅的光谱仪
公开(公告)号：US06233373B1
公开(公告)日：2001-05-15
申请号：US09337159
申请日：1999-06-21
申请人： Charles G. Askins , Martin A. Putnam
发明人： Charles G. Askins , Martin A. Putnam
IPC分类号： G02B602
CPC分类号： G01J3/02 , G01J3/021 , G01J3/18 , G01J3/1895 , G01J3/2803 , G02B6/2932
摘要： An aspect of the present invention is an optical spectrometer for detecting a spectral signature of a input optical signal, including: (a) a collimating lens having an optical axis and focal plane, for collimating the input optical signal; (b) an input optical system, for directing the input optical signal to the collimating lens; (c) a diffraction grating, for scattering the collimated input optical signal, positioned in the path of collimated light from the collimating lens, oriented to reflect a majority of the scattered light through the collimating lens; and (d) a detector, in a focal plane of the collimating lens. Another aspect of the invention is a fiber-based sensing system using the optical spectrometer of the invention. Such a system will include (a) an optical fiber having an array of fiber Bragg gratings, where each of the gratings is reflective at a selected wavelength; (b) a light source, for radiating light at each of the selected wavelengths, optically coupled to the optical fiber; and (c) the optical spectrometer of the invention, optically coupled to the optical fiber, for detecting a spectral signature of reflected light from the fiber Bragg gratings. Typically, the spectrometer output will be fed to a data capturing system, and subsequently to a data analysis system, which may combined in a single computer system for control, data capture.
摘要翻译：本发明的一个方面是用于检测输入光信号的光谱特征的光谱仪，包括：（a）具有光轴和焦平面的准直透镜，用于准直输入光信号; （b）用于将输入光信号引导到准直透镜的输入光学系统; （c）衍射光栅，用于散射位于来自准直透镜的准直光的路径中的准直输入光信号，其被定向成反射大部分散射光通过准直透镜; 和（d）在准直透镜的焦平面中的检测器。本发明的另一方面是使用本发明的光谱仪的基于光纤的感测系统。这样的系统将包括（a）具有光纤布拉格光栅阵列的光纤，其中每个光栅以选定的波长反射; （b）光源，用于在每个所选择的波长处照射光，光耦合到光纤; 和（c）光学耦合到光纤的本发明的光谱仪，用于检测来自光纤布拉格光栅的反射光的光谱特征。通常，光谱仪输出将被馈送到数据捕获系统，然后被馈送到数据分析系统，其可以组合在单个计算机系统中用于控制，数据捕获。

4. 依法登记的发明

USH1268H Method and apparatus for controlling internal rotation of principal axes in fabrication of birefringement fibers 失效
标题翻译：用于控制双折射纤维制造中主轴内旋转的方法和装置
公开(公告)号：USH1268H
公开(公告)日：1993-12-07
申请号：US906093
申请日：1992-06-29
申请人： Charles G. Askins , Michael J. Marrone
发明人： Charles G. Askins , Michael J. Marrone
IPC分类号： G01M11/00 , G01N21/23 , G01N21/00 , C03B37/075
CPC分类号： G01M11/37 , G01N21/23
摘要： A technique and apparatus for detecting the internal rotation of the principal axes in the fabrication of birefringent fibers is based upon a new method for producing and interpreting the interference fringe pattern backscattered power from a birefringent fiber side-illuminated with a laser light source to determine the internal orientation of the strain-inducing axes. An apparatus employing this technique for controlling internal rotation of the principal axes provides for adjustment of the orientation of at least one of the traction surfaces pulling the fiber during drawing fabrication to maintain parallel alignment of the planes of rotation of the surfaces to reduce the fiber rotation-inducing motion which leads to internal rotation of the fiber's principal axes.

5. 发明申请

US20120281205A1 METHOD AND APPARATUS FOR MEASURING FIBER TWIST BY POLARIZATION TRACKING 有权
标题翻译：用于通过偏振跟踪测量光纤的方法和装置
公开(公告)号：US20120281205A1
公开(公告)日：2012-11-08
申请号：US13552948
申请日：2012-07-19
申请人： Charles G. Askins
发明人： Charles G. Askins
IPC分类号： G01N21/23
CPC分类号： G01M11/088 , G01D5/344 , G01D5/35316 , G01D5/35354 , G01M11/3181 , G02B6/274 , G02B6/29319
摘要： A method of measuring fiber twist in a multi-core optical fiber bearing an FBG with polarization dependent reflectivity. The state of polarization of the launched light is adjusted until the reflected FBG wavelength is maximal, indicating that light reaching the FBG is linearly polarized, and the polarization axis of the light reaching the FBG is aligned with the slow birefringent axis of the FBG; the SOP of launched light is now measured. Bending experienced by the fiber is measured conventionally, and birefringence produced by bending of the multi-core optical fiber is calculated. A candidate amount of twist between the launch location and the FBG is proposed, and the corresponding twist-induced birefringence is calculated. When calculations show that light with the launched SOP becomes linearly polarized and aligned with the FBG after traversing a fiber section with the calculated birefringences and proposed rotation, the amount of twist has been properly identified.
摘要翻译：在具有偏振相关反射率的FBG的多芯光纤中测量纤维捻度的方法。调整发射光的偏振状态，直到反射的FBG波长最大，表示到达FBG的光线性偏振，并且到达FBG的光的偏振轴与FBG的慢双折射轴对准; 现在测量发射光的SOP。通常测量纤维经历的弯曲，并且计算通过多芯光纤的弯曲产生的双折射。提出了发射位置和FBG之间的候选扭曲量，并计算出相应的扭曲双折射。当计算结果表明，使用推出的SOP的光线在通过计算的双折射和提出的旋转穿过纤维部分之后，线性偏振并与FBG对准，扭曲量已被适当地识别。

6. 发明授权

US5400422A Technique to prepare high-reflectance optical fiber bragg gratings with single exposure in-line or fiber draw tower 失效
标题翻译：制备具有单次曝光在线或纤维拉制塔的高反射率光纤布拉格光栅的技术
公开(公告)号：US5400422A
公开(公告)日：1995-03-21
申请号：US6544
申请日：1993-01-21
申请人： Charles G. Askins , Edward J. Friebele
发明人： Charles G. Askins , Edward J. Friebele
IPC分类号： C03B37/027 , C03C25/62 , G02B6/34
CPC分类号： G02B6/02133 , C03B37/027 , C03C25/6226 , C03C25/6233 , C03B2201/31 , C03B2201/34 , C03B2201/36 , C03B2203/18 , C03B2205/20 , G02B2006/02157
摘要： A process for making an optical reflection grating in a glass fiber includes exposing an unjacketed optic fiber to a single writing pulse from a pair of interfering light beams that form an interference pattern in the fiber. A novel optical fiber has at least one optical grating with a preselected Bragg spacing in at least one region of the fiber, with a periodic modulation in its index of refraction, with high thermal stability and narrow linewidth. A process for making an array of optical reflection gratings in a glass fiber includes exposing a fiber to a plurality of writing pulse from a pair of interfering light beams that form an interference pattern in the fiber, where these pulses are applied sequentially as the fiber is drawn from a draw furnace. A novel optical fiber has a plurality of unspliced gratings with high thermal stability and narrow linewidth.
摘要翻译：用于在玻璃纤维中制造光学反射光栅的工艺包括将未封装的光纤暴露于在光纤中形成干涉图案的一对干涉光束的单个写入脉冲。一种新颖的光纤具有在光纤的至少一个区域中具有预选布拉格间隔的至少一个光栅，其折射率具有周期性调制，具有高热稳定性和窄线宽。用于在玻璃纤维中制造光学反射光栅阵列的工艺包括将光纤暴露于来自在光纤中形成干涉图案的一对干涉光束的多个写入脉冲，其中这些脉冲是随着光纤被依次施加的从拉丝机拉出。新颖的光纤具有多个具有高热稳定性和窄线宽的未切割光栅。

7. 发明授权

US08452135B2 Method and apparatus for measuring fiber twist by polarization tracking 有权
标题翻译：通过极化跟踪测量纤维捻度的方法和装置
公开(公告)号：US08452135B2
公开(公告)日：2013-05-28
申请号：US13552948
申请日：2012-07-19
申请人： Charles G Askins
发明人： Charles G Askins
IPC分类号： G02B6/00 , G02B6/34 , G01J3/28 , G01J4/00 , G01N21/00
CPC分类号： G01M11/088 , G01D5/344 , G01D5/35316 , G01D5/35354 , G01M11/3181 , G02B6/274 , G02B6/29319
摘要： A method of measuring fiber twist in a multi-core optical fiber bearing an FBG with polarization dependent reflectivity. The state of polarization of the launched light is adjusted until the reflected FBG wavelength is maximal, indicating that light reaching the FBG is linearly polarized, and the polarization axis of the light reaching the FBG is aligned with the slow birefringent axis of the FBG; the SOP of launched light is now measured. Bending experienced by the fiber is measured conventionally, and birefringence produced by bending of the multi-core optical fiber is calculated. A candidate amount of twist between the launch location and the FBG is proposed, and the corresponding twist-induced birefringence is calculated. When calculations show that light with the launched SOP becomes linearly polarized and aligned with the FBG after traversing a fiber section with the calculated birefringences and proposed rotation, the amount of twist has been properly identified.
摘要翻译：在具有偏振相关反射率的FBG的多芯光纤中测量纤维捻度的方法。调整发射光的偏振状态，直到反射的FBG波长最大，表示到达FBG的光线性偏振，并且到达FBG的光的偏振轴与FBG的慢双折射轴对准; 现在测量发射光的SOP。通常测量纤维经历的弯曲，并且计算通过多芯光纤的弯曲产生的双折射。提出了发射位置和FBG之间的候选扭曲量，并计算出相应的扭曲双折射。当计算结果表明，使用推出的SOP的光线在通过计算的双折射和提出的旋转穿过纤维部分之后，线性偏振并与FBG对准，扭曲量已被适当地识别。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式