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1. 发明授权

US06930768B2 Detection of discontinuities in a multimode optical fiber 有权
标题翻译：检测多模光纤中的不连续性
公开(公告)号：US06930768B2
公开(公告)日：2005-08-16
申请号：US10436030
申请日：2003-05-12
申请人： Andrew L. Ingles, Jr. , Alice Liu , William A. Reed , Peng Wang , Ming Yang
发明人： Andrew L. Ingles, Jr. , Alice Liu , William A. Reed , Peng Wang , Ming Yang
IPC分类号： G01M11/00 , G01M11/08 , G01N21/00
CPC分类号： G01M11/083 , G01M11/3109
摘要： A system and technique for determining discontinuities over a span of a multimode optical fiber (MMF). An optical time domain reflectometer (OTDR) has an operating port, and a first end face of a singlemode optical fiber (SMF) is coupled to the operating port. Light pulses produced by the OTDR emerge from a second end face of the SMF, and an alignment stage aligns the second end face with an end face of a multimode optical fiber (MMF) having a core of given radius. The light pulses from the second end face of the SMF are applied at selected radial positions on the MMF core to excite corresponding mode groups in the MMF. Backscatter light produced by each excited mode group is coupled to the OTDR through the SMF. Locations and values of events detected along the MMF are indicated on the OTDR for each selected radial position.
摘要翻译：一种用于确定多模光纤（MMF）的跨度上的不连续性的系统和技术。光时域反射计（OTDR）具有操作端口，并且单模光纤（SMF）的第一端面耦合到操作端口。由OTDR产生的光脉冲从SMF的第二端面出现，并且对准台将第二端面与具有给定半径的芯的多模光纤（MMF）的端面对准。来自SMF的第二端面的光脉冲被施加在MMF芯上的选定的径向位置，以激发MMF中相应的模式组。由每个激发模式组产生的反向散射光通过SMF耦合到OTDR。每个选定的径向位置，在OTDR上都会显示沿着MMF检测到的事件的位置和值。

2. 发明授权

US06456370B1 Method of measuring bending loss with an optical time domain reflectometer 失效
标题翻译：用光时域反射计测量弯曲损耗的方法
公开(公告)号：US06456370B1
公开(公告)日：2002-09-24
申请号：US09820405
申请日：2001-03-29
申请人： Andrew L. Ingles, Jr.
发明人： Andrew L. Ingles, Jr.
IPC分类号： G01N2100
CPC分类号： G01M11/088
摘要： This disclosure provides a method, system, and computer system for measuring bending loss of an optical fiber with an optical time domain reflectometer (OTDR). Generally, the method of the present invention provides OTDR device that measures a one-way OTDR splice loss at a point in the optical fiber. Subsequently, a bend is introduced into the optical fiber and a second one-way OTDR splice loss measurement is performed at the same point in the optical fiber as the first measurement. Thereafter, the bending loss of the optical fiber is determined and related to an approximate cut-off wavelength of the optical fiber.
摘要翻译：本公开提供了一种用光学时域反射计（OTDR）测量光纤弯曲损耗的方法，系统和计算机系统。通常，本发明的方法提供了测量光纤中的点处的单向OTDR接合损耗的OTDR器件。随后，将弯曲部引入到光纤中，并且在第一测量中在光纤中的相同点进行第二单向OTDR接合损耗测量。此后，光纤的弯曲损耗被确定并且与光纤的近似截止波长有关。

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