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1. 发明授权

US11870491B2 Method and apparatus for measurement of mode delay in optical fibers 有权
公开(公告)号：US11870491B2
公开(公告)日：2024-01-09
申请号：US17153798
申请日：2021-01-20
申请人： Fluke Corporation
发明人： J. David Schell
IPC分类号： H04B10/079 , H04B10/25 , G01M11/00 , G02B6/42 , G02B6/028
CPC分类号： H04B10/0795 , G01M11/33 , G02B6/4206 , H04B10/25 , G02B6/0288
摘要： A system for testing an optical fiber includes an optical source apparatus and an optical image sensor apparatus. The optical source apparatus includes a fiber optic connector that connects to a first end of the fiber, and a light emitting device which emits light into the first end of the fiber. The optical image sensor apparatus includes a fiber optic connector that connects to a second end of the fiber, an image sensor that receives light output from the second end of the fiber and generates corresponding image data, a lens array in an optical path between the fiber optic connector and the image sensor, and a processor coupled to the image sensor. The processor, in operation, determines a set of two-dimensional positions based on the image data output from the image sensor, and determines a test result based on the set of two-dimensional positions.

2. 发明公开

US20230258882A1 MODAL CONDITIONER FOR USE WITH BEND-INSENSITIVE, MULTIMODE OPTICAL FIBERS 审中-公开
公开(公告)号：US20230258882A1
公开(公告)日：2023-08-17
申请号：US18165581
申请日：2023-02-07
申请人： COMMSCOPE TECHNOLOGIES LLC
发明人： Antonius Bernardus Gerardus BOLHAAR , Sander Johannes FLORIS , Gary Federico GIBBS , Bradley Scott BILLMAN
IPC分类号： G02B6/42 , G01M11/00 , G02B6/028
CPC分类号： G02B6/4206 , G01M11/33 , G02B6/028
摘要： A light source unit generates an optical signal out of a bend-insensitive (“BI”) optical fiber that is compliant with a desired encircled flux (“EF”). The unit includes a light source to generate an optical light signal and a conventional multimode optical fiber coupled to receive the optical light signal from the light source at a first end. A modal conditioner is arranged to condition the optical light signal propagating along different modes of the conventional multimode fiber. A first bend-insensitive (BI) multimode optical fiber has an input end, the input end of the first BI multimode optical fiber being coupled at a second end of the conventional multimode optical fiber to receive the conditioned optical light signal from the conventional multimode fiber. The output from the first BI multimode optical fiber outputs an optical signal having the desired EF.

3. 发明申请

US20180340859A1 DOE defect monitoring utilizing total internal reflection 审中-公开
公开(公告)号：US20180340859A1
公开(公告)日：2018-11-29
申请号：US16055181
申请日：2018-08-06
申请人： Apple Inc.
发明人： Brian S. Medower , Meng Zhang
IPC分类号： G01M11/02 , G02B5/18 , G01N21/88 , G01M11/00 , G02B6/124 , F21V8/00
CPC分类号： G01M11/0207 , G01M11/33 , G01N21/8806 , G01N21/958 , G01N2021/9511 , G01N2201/061 , G02B5/18 , G02B6/0033 , G02B6/124 , G02B2005/1804
摘要： An optical apparatus includes a diffractive optical element (DOE), having at least one optical surface, a side surface, which is not parallel to the at least one optical surface of the DOE, and a grating, which is formed on the at least one optical surface so as to receive and diffract first radiation from a primary radiation source that is incident on the grating. The apparatus further includes at least one secondary radiation source, which is configured to direct second radiation to impinge on the side surface, causing at least part of the second radiation to propagate within the DOE while diffracting internally from the grating and to exit through the side surface. The apparatus also includes at least one radiation detector, which is positioned so as to receive and sense an intensity of the second radiation that has exited through the side surface.

4. 发明授权

US10073004B2 DOE defect monitoring utilizing total internal reflection 有权
公开(公告)号：US10073004B2
公开(公告)日：2018-09-11
申请号：US15594607
申请日：2017-05-14
申请人： Apple Inc.
发明人： Brian S. Medower , Meng Zhang
IPC分类号： G01J1/42 , G01M11/02 , G01N21/88 , G02B5/18 , G02B6/124
CPC分类号： G01M11/0207 , G01M11/33 , G01N21/8806 , G01N21/958 , G01N2021/9511 , G01N2201/061 , G02B5/18 , G02B6/0033 , G02B6/124 , G02B2005/1804
摘要： An optical apparatus includes a diffractive optical element (DOE), having at least one optical surface, a side surface, which is not parallel to the at least one optical surface of the DOE, and a grating, which is formed on the at least one optical surface so as to receive and diffract first radiation that is incident on the grating. The apparatus further includes at least one secondary radiation source, which is configured to direct second radiation to impinge on the side surface, causing at least part of the second radiation to propagate within the DOE while diffracting internally from the grating and to exit through the side surface. The apparatus also includes at least one radiation detector, which is positioned so as to receive and sense an intensity of the second radiation that has exited through the side surface.

5. 发明申请

US20180202895A1 MODE-DEPENDENT LOSS MEASUREMENT METHOD AND MEASUREMENT DEVICE 审中-公开
公开(公告)号：US20180202895A1
公开(公告)日：2018-07-19
申请号：US15923062
申请日：2018-03-16
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Tetsuya HAYASHI
IPC分类号： G01M11/00 , G02B6/02 , G02B6/42
CPC分类号： G01M11/337 , G01M11/33 , G02B6/02 , G02B6/02014 , G02B6/02042 , G02B6/02266 , G02B6/2808 , G02B6/42
摘要： A present embodiment relates to a MDL measurement method and the like including a structure for enabling MDL measurement without increasing a processing load. The present embodiment sequentially executes, for N (≥2) spatial modes, light-input operation of inputting light of a predetermined intensity to an arbitrary spatial mode, and intensity measurement operation of measuring an output light intensity of each of the N spatial modes including the arbitrary spatial mode, to generate a transfer matrix relating to transmission loss in an optical fiber as a measurement target, and determine at least a linear value of MDL per unit fiber length by using each component value of the generated transfer matrix.

6. 发明授权

US09995649B2 Dual purpose optical test instrument 有权
公开(公告)号：US09995649B2
公开(公告)日：2018-06-12
申请号：US15146765
申请日：2016-05-04
申请人： Fluke Corporation
发明人： J. David Schell , Richard G. Tyler
IPC分类号： G01N21/00 , G01M11/00 , G02B6/38 , H04B10/07
CPC分类号： G01M11/3145 , G01M11/33 , G02B6/385 , H04B10/07
摘要： One or more embodiments are directed to optical test instruments, such as fiber optic inspection scopes and optical power meters, for testing optical communication links, such as fiber optic connectors. The optical test instruments include a single test port that is able to operate in two modes of operation. In a first mode of operation, the optical test instrument is configured to provide an image of the endface of a fiber optic connector under test. In a second mode of operation, the optical test instrument is configured to measure power or power loss in an optical fiber under test. In that regard, the fiber optic connector only has to be coupled to a single port of an optical test instrument for a visual inspection of an endface of a fiber optic connector and a power test of the optical fiber under test.

7. 发明申请

US20180100782A1 METHOD OF EVALUATING CHARACTERISTICS OF OPTICAL FIBER, AND APPARATUS OF EVALUATING CHARACTERISTICS OF OPTICAL FIBER 审中-公开
公开(公告)号：US20180100782A1
公开(公告)日：2018-04-12
申请号：US15726416
申请日：2017-10-06
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Tetsuya HAYASHI
IPC分类号： G01M11/00 , G01N21/41
CPC分类号： G01M11/33
摘要： An optical-fiber-characteristic-evaluating apparatus includes a measuring unit and an analyzing unit. The measuring unit measures, in one arbitrary direction, dependence Fφ(φ) of an electric field F of a measurement-object mode, which is one of high-order spatial modes of a multimode optical fiber that is to be evaluated, upon an angle of divergence φ in a far field by performing FFS. The analyzing unit obtains dependence fr(r) of the electric field F of the measurement-object mode upon a fiber-radial-direction position r at the exit end of the multimode optical fiber by performing a calculation in accordance with a predetermined expression containing Fφ(φ).

8. 发明申请

US20180059323A1 SPLICE WITH CLADDING MODE LIGHT STRIPPING 审中-公开
公开(公告)号：US20180059323A1
公开(公告)日：2018-03-01
申请号：US15686100
申请日：2017-08-24
申请人： Chris A. Rivera , Dahv A.V. Kliner , Joseph Emery
发明人： Chris A. Rivera , Dahv A.V. Kliner , Joseph Emery
IPC分类号： G02B6/255 , G02B6/14 , G02B6/245 , G01M11/00
CPC分类号： G02B27/10 , G01M11/33 , G02B6/02042 , G02B6/04 , G02B6/14 , G02B6/245 , G02B6/2551 , G02B6/2558 , G02B6/2773 , G02B6/2821 , G02B6/4296 , H01S3/0064 , H01S3/0407 , H01S3/06754 , H01S3/06783 , H01S3/1305
摘要： Beam combining optical systems include a fiber beam combiner having multiple inputs to which output fibers of laser diode sources are spliced. Cladding light stripping regions are situated at the splices, and include exposed portions of fiber claddings that are at least partially encapsulated with an optical adhesive or a polymer. A beam combiner fiber that is optically downstream of a laser source has an exposed cladding secured to a thermally conductive support with a polymer or other material that is index matched to the exposed cladding. This construction permits attenuation of cladding light propagating toward a beam combiner from a splice.

9. 发明授权

US09612177B2 Ferrule-core concentricity measurement systems and methods 有权
公开(公告)号：US09612177B2
公开(公告)日：2017-04-04
申请号：US14571557
申请日：2014-12-16
申请人： CORNING OPTICAL COMMUNICATIONS LLC
发明人： Sterling Michael Clarke , John Joseph Costello, III , En Hong , Garrett Andrew Piech , Michael Brian Webb , Elvis Alberto Zambrano
IPC分类号： G01N21/00 , G06K9/00 , G02B6/00 , G01M11/00 , G01B11/14 , G02B6/38
CPC分类号： G02B6/385 , G01B11/14 , G01M11/33 , G02B6/3834 , G02B6/3843
摘要： Systems and methods of measuring ferrule-core concentricity for an optical fiber held by a ferrule are disclosed. The method includes: generating ferrule distance data by measuring distances to a ferrule outside surface as a function of rotation angle using a distance sensor and rotating either the ferrule or the distance sensor about an axis of rotation that is off-center from the true ferrule axis; aligning the axis of rotation with the fiber core; using the ferrule distance data to determine a position of the true ferrule center relative to the optical fiber core; and measuring the concentricity as the distance between the true center of the ferrule and the optical fiber core.

10. 发明授权

US09518892B1 Apparatus for identifying optical array polarity and measuring optical signal and power or loss 有权
标题翻译：用于识别光学阵列极性并测量光信号和功率或损耗的装置
公开(公告)号：US09518892B1
公开(公告)日：2016-12-13
申请号：US14830564
申请日：2015-08-19
申请人： FLUKE CORPORATION
发明人： J. David Schell
IPC分类号： G01N21/00 , G01M11/00 , G02B6/38 , G01D5/26 , G01J1/42
CPC分类号： G01M11/33 , G01D5/268 , G01J1/42 , G02B6/3885 , G02B6/3895 , H04B10/07
摘要： An apparatus for determining optical fiber array polarity is disclosed. The apparatus may be used to determine optical signal loss or intensity. An adapter may be used to couple the apparatus to a variety of optical fiber connectors. The apparatus includes a position sensing detector and processing circuitry. The position sensing detector includes a sensor that receives optical signals and electrodes that output respective output signals in response to receipt of an optical signal. The processing circuitry receives the output signals and identifies locations at which the optical signals were incident on the sensor. The processing circuitry also determines the receiving position in the optical array of an optical fiber and a polarity of the optical array based on the receiving position and a corresponding transmitting position. The processing circuitry may determine an intensity or loss of the optical signal based on an aggregate of the output signals.
摘要翻译：公开了一种用于确定光纤阵列极性的装置。该装置可用于确定光信号损失或强度。可以使用适配器来将设备耦合到各种光纤连接器。该装置包括位置检测检测器和处理电路。位置检测检测器包括接收光信号的传感器和响应于光信号的接收而输出相应输出信号的电极。处理电路接收输出信号并识别光信号入射到传感器上的位置。处理电路还基于接收位置和对应的发送位置确定光纤阵列中的接收位置和光学阵列的极性。处理电路可以基于输出信号的聚合来确定光信号的强度或损失。

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