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1. 发明公开

EP4166517A1 OPTICAL FIBER AND METHOD FOR PRODUCING OPTICAL FIBER 审中-实审
公开(公告)号：EP4166517A1
公开(公告)日：2023-04-19
申请号：EP21822269.3
申请日：2021-05-18
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： HASEGAWA Takemi , KAWAGUCHI Yuki
IPC分类号： C03B37/023 , G02B6/02 , G02B6/44
摘要： An optical fiber has a central axis. The optical fiber includes a core made of silica glass and extending along the central axis, a cladding made of silica glass and surrounding the core, the cladding extending along the central axis, and a coating layer made of resin and surrounding the cladding, the coating layer extending along the central axis. An outer diameter of the cladding varies along the central axis. A residual stress in a direction along the central axis varies along the central axis, the residual stress being averaged over the core and the cladding in a cross section perpendicular to the central axis. A deviation from an average value of the outer diameter and a deviation from an average value of the residual stress have signs opposite to each other.

2. 发明公开

EP4220995A1 MULTICORE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM 审中-实审
公开(公告)号：EP4220995A1
公开(公告)日：2023-08-02
申请号：EP21872564.6
申请日：2021-09-24
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： SUGANUMA Takahiro , HASEGAWA Takemi , HAYASHI Tetsuya , SAKUMA Hirotaka
IPC分类号： H04B10/25 , G02B6/02
摘要： A multi-core optical fiber includes: a pair of cores; and a cladding that covers both of the pair of cores. A diameter of the cladding is 124 µm or more and 126 m or less. A distance between centers of the pair of cores is 46.5 µm or less. Cross talk between counter-propagating cores at a wavelength of 1550 nm is -30 dB/100km or less.

3. 发明公开

EP3591450A1 OPTICAL FIBER 审中-公开
公开(公告)号：EP3591450A1
公开(公告)日：2020-01-08
申请号：EP18761969.7
申请日：2018-01-19
申请人： Sumitomo Electric Industries, Ltd.
发明人： TAMURA, Yoshiaki , SOHMA, Kazuyuki , HASEGAWA Takemi
IPC分类号： G02B6/44 , G02B6/02 , G02B6/036
摘要： An optical fiber according to an embodiment comprises, as a structure suitable for large capacity transmission over a long haul, a core, a cladding having an outer diameter of 80 µm or more and 130 µm or less, a primary coating, and a secondary coating having elasticity higher than that of the primary coating and an outer diameter of 210 µm or less. The optical fiber having the structure as described above has an MFD of 10 µm or more at a wavelength of 1550 nm, a cable cutoff wavelength longer than 1260 nm, and a microbending loss of 0.6 dB/km or less at a wavelength of 1550 nm.

4. 发明公开

EP2329907A1 LASER PROCESSING APPARATUS AND PROCESSING METHOD EMPLOYED THEREIN 审中-公开
标题翻译：激光雷达发射器（VERARBEITUNGSVERFAHREN）
公开(公告)号：EP2329907A1
公开(公告)日：2011-06-08
申请号：EP09797780.5
申请日：2009-06-18
申请人： Sumitomo Electric Industries, Ltd.
发明人： YAMADA Eiichiro , INOUE Akira , NAKAZATO Koji , KOHDA Hiroshi , HATAYAMA Hitoshi , HASEGAWA Takemi
IPC分类号： B23K26/00 , B23K26/08 , A61B1/00 , G02B23/26
CPC分类号： G02B6/04 , B23K26/032 , B23K2201/40 , G01N21/95684
摘要： A laser processing apparatus 1 includes a processing light source 3 emitting processing light; an observation light emitting unit 4 emitting observation light; optical fibers 19 conducting light having a plurality of wavelengths generated at an electronic component 2; a detecting unit 5 detecting the light conducted by the optical fibers 19; and a control unit 31 controlling a light emitting state of the processing light emitting unit 3. The optical fibers 19 are categorized into four groups, and disposed so as to surround an optical fiber 18 conducting the processing light. The optical fibers 19 categorized into the four groups are capable of conducting the observation light to the electronic component 2 every group.
摘要翻译：激光加工设备1包括发射处理光的处理光源3; 发射观察光的观察发光单元4; 在电子部件2处产生具有多个波长的光的光纤19; 检测由光纤19传导的光的检测单元5; 以及控制处理用发光单元3的发光状态的控制单元31.光纤19分为四组，并且设置成围绕进行处理光的光纤18。分为四组的光纤19能够每组观察光到电子部件2。

5. 发明公开

EP2284514A1 BEAM PATH MONITORING DEVICE, AND BEAM PATH MONITORING SYSTEM 有权
标题翻译：用于监控光路和监测系统的光路
公开(公告)号：EP2284514A1
公开(公告)日：2011-02-16
申请号：EP09758230.8
申请日：2009-05-25
申请人： Sumitomo Electric Industries, Ltd.
发明人： HASEGAWA Takemi , HAYASHI Tetsuya , NAKAJI Haruo
IPC分类号： G01M11/00
CPC分类号： G01M11/3136 , G01M11/3145
摘要： An optical line monitoring apparatus and optical line monitoring system which can measure a reflectance distribution in an optical line with a high spatial resolution in a short time are provided. An optical line monitoring apparatus 14A provided in a station 10A comprises an OCDR measurement section 15 for carrying out OCDR measurement, an OTDR measurement section 16 for carrying out OTDR measurement, an optical switch 13 for selectively connecting one of the OCDR measurement section 15 and OTDR measurement section 16 to the optical coupler 12, a control section 17, and a storage device 18. The control section 17 performs a predetermined arithmetic operation according to an OCDR measurement result acquired by causing the OCDR measurement section 15 to carry out the OCDR measurement and an OTDR measurement result acquired by causing the OTDR measurement section 16 to carry out the OTDR measurement.
摘要翻译：本发明提供一种光线路监视装置和光线路监视系统，其可以在与在短时间内高空间分辨率的光学线测量的反射率分布。在站OCDR测定部15的10A包括用于执行OCDR测定到OTDR测定部16用于执行OTDR测量到光开关13，用于选择性地将OCDR测定部15及OTDR的一个中提供的光线路监视装置14A 测量部16与光学耦合器12，一个控制部17，以及存储装置18。控制部17在通过使OCDR测定部15进行OCDR测定及取得OCDR测定结果执行预定的算术运算雅丁到到通过使OTDR测定部16进行OTDR测定取得OTDR测定结果。

6. 发明公开

EP3623789A1 NONLINEARITY MEASURING METHOD AND NONLINEARITY MEASURING DEVICE 有权
公开(公告)号：EP3623789A1
公开(公告)日：2020-03-18
申请号：EP18798419.0
申请日：2018-05-11
申请人： Sumitomo Electric Industries, Ltd.
发明人： HASEGAWA Takemi , HAYASHI Tetsuya
IPC分类号： G01M11/02
摘要： The present invention relates to a method and device for measuring optical nonlinearity of an optical fiber to be measured comprising a plurality of cores having mutually coupled waveguide modes. The method includes at least a preparing step of arranging a laser light source configured to emit laser light and a detecting unit configured to determine an optical intensity, a light launching step of inputting laser light into a specific core of the optical fiber to be measured, a light detecting step of determining the intensity of a specific wavelength component caused by optical nonlinearity among the reflective light components from the optical fiber to be measured, and an analyzing step of determining optical nonlinearity of the optical fiber to be measured on the basis of the intensity of the specific wavelength component.

7. 发明公开

EP3457184A1 COUPLED MULTICORE OPTICAL FIBER AND OPTICAL TRANSMISSION SYSTEM INCLUDING SAME 审中-公开
公开(公告)号：EP3457184A1
公开(公告)日：2019-03-20
申请号：EP17796193.5
申请日：2017-05-10
申请人： Sumitomo Electric Industries, Ltd.
发明人： HASEGAWA Takemi , HAYASHI Tetsuya , TAMURA Yoshiaki
IPC分类号： G02B6/02
摘要： The present embodiment relates to a CC-MCF capable of generating sufficient mode coupling even with bending or twisting less. The CC-MCF includes two fiber parts having cores mutually directly or indirectly connected, each fiber part having a plurality of cores in which a pair of adjacent cores has a mode-coupling coefficient of 1 (1/m) or more. Each fiber part is provided with a transition section including a fiber end face and a stationary section adjacent to the transition section. In the stationary section, the MFD of each core is substantially constant in a fiber longitudinal direction, and in the transition section, the MFD of each core is continuously expanding from the stationary section to the fiber end face.

8. 发明公开

EP4141499A1 GAIN FLATTENING FILTER, AND METHOD FOR MANUFACTURING GAIN FLATTENING FILTER 审中-实审
公开(公告)号：EP4141499A1
公开(公告)日：2023-03-01
申请号：EP21791610.5
申请日：2021-04-05
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. , Sumitomo Electric Optifrontier Co., Ltd.
发明人： NAGANO Shigehiro , HASEGAWA Takemi , KINUGASA Jun , MASUI Kazuaki
IPC分类号： G02B6/02 , G02B6/036 , G02B6/255
摘要： A gain flattening filter includes a first optical fiber that has a core, a core, a first cladding, and a second cladding and that has a uniform composition in a length direction; and a pair of second optical fibers fused to both ends of the first optical fiber. The first optical fiber has a first section in which a slanted refractive index grating is formed and a pair of second sections connecting both ends of the first section to the pair of second optical fibers. The first cladding contains a photosensitive material whose refractive index increases upon irradiation with light having a specific wavelength. In the core, a tensile stress remains in the first section. An average MFD of the second sections is larger than an average MFD of the second optical fibers and smaller than an average MFD of the first section.

9. 发明公开

EP4050388A1 OPTICAL FIBER AND OPTICAL CABLE 审中-公开
公开(公告)号：EP4050388A1
公开(公告)日：2022-08-31
申请号：EP20878082.5
申请日：2020-10-13
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： HASEGAWA Takemi , KAWAGUCHI Yuki , SUZUKI Masato
IPC分类号： G02B6/028 , G02B6/036
摘要： The present disclosure relates to an optical fiber or the like that can be adapted to an optical transceiver for a short wavelength band of 850 nm or more and 1060 nm or less while maintaining compatibility with an SMF of the related art. An optical fiber of one embodiment includes a core, a cladding, and a resin coating, and has a mode field diameter of 8.2 µm or more and 9.6 µm or less at a wavelength of 1310 nm, a cable cutoff wavelength of an LP11 mode of 1060 nm or more and 1260 nm or less, and a cable cutoff wavelength of an LP02 mode of 1060 nm or less.

10. 发明公开

EP3474050A1 METHOD FOR AXIAL ALIGNMENT OF COUPLED MULTICORE OPTICAL FIBER 审中-公开
公开(公告)号：EP3474050A1
公开(公告)日：2019-04-24
申请号：EP17813432.6
申请日：2017-06-16
申请人： Sumitomo Electric Industries, Ltd.
发明人： SAKUMA Hirotaka , HASEGAWA Takemi
IPC分类号： G02B6/26 , G02B6/02 , G02B6/24
摘要： The present embodiment relates to a method for enabling axis alignment to realize a desired coupling state between CC-MCFs. In this method, a relative position and a relative angle for realizing a desired coupling state are determined by repeatedly performing a step of performing one or both of a relative movement and a relative rotation of a first CC-MCF and a second CC-MCF, and a step of calculating a coupling efficiency index between the first and second CC-MCFs by detecting light propagating through the first and second CC-MCFs, and comparing each of the obtained coupling efficiency indices.

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