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1. 发明申请

US20190317380A1 OPTICAL DEVICE, METHOD FOR MANUFACTURING OPTICAL DEVICE, AND WAVELENGTH CONVERSION METHOD 审中-公开
公开(公告)号：US20190317380A1
公开(公告)日：2019-10-17
申请号：US16451502
申请日：2019-06-25
申请人： Sumitomo Electric Industries, Ltd.
发明人： Shigehiro NAGANO , Masato SUZUKI , Masato TANAKA , Manabu SHIOZAKI , Hiroo KANAMORI
IPC分类号： G02F1/383 , G02B6/032 , G02B6/036
摘要： The present embodiment relates to an optical device or the like that is high in non-linearity and resistance to UV light and includes a structure allowing stable wavelength conversion. The optical device is comprised of glass containing SiO2 and comprises a repetitive structure including first sections being crystallized regions in which a radial polarization-ordered structure is formed and second sections being non-crystallized regions alternately arranged along a center axis extending from a center of a light-incidence end face toward a center of a light-emission end face.

2. 发明申请

US20160167166A1 LASER PROCESSING METHOD AND LASER BEAM IRRADIATION APPARATUS 审中-公开
标题翻译：激光加工方法和激光束辐射装置
公开(公告)号：US20160167166A1
公开(公告)日：2016-06-16
申请号：US14436616
申请日：2013-10-01
申请人： SUMITOMO Electric Industries ,Ltd.
发明人： Shigehiro NAGANO , Motoki KAKUI , Yasuhiro OKAMOTO , Akira OKADA
IPC分类号： B23K26/06 , B23K26/046
CPC分类号： B23K26/0648 , B23K26/046 , B23K26/0665
摘要： There is provided a laser processing method using a laser processing apparatus including a laser beam source for outputting a laser beam including a plurality of wavelength components, a collimating lens for receiving the laser beam, and a focusing lens for receiving the laser beam collimated by the collimating lens, the laser processing method including the step of: irradiating a material to be processed with the laser beam focused by the focusing lens in the laser processing apparatus. In the step of irradiating the material to be processed with the laser beam, positions of the collimating lens and the focusing lens are adjusted, and a wavefront shape of the laser beam received by the focusing lens is adjusted, thereby adjusting a size of a focusing area constituted by a plurality of focuses corresponding to the plurality of wavelength components of the laser beam focused by the focusing lens.
摘要翻译：提供一种使用激光加工装置的激光加工方法，该激光加工装置包括：激光束源，用于输出包括多个波长成分的激光束;准直透镜，用于接收激光束;以及聚焦透镜，用于接收由所述激光束准直的激光束准直透镜，该激光加工方法包括以下步骤：在激光加工设备中用聚焦透镜聚焦的激光束照射被处理材料。在用激光束照射待处理材料的步骤中，调整准直透镜和聚焦透镜的位置，调整由聚焦透镜接收的激光束的波前形状，从而调节聚焦的尺寸由与由聚焦透镜聚焦的激光束的多个波长分量对应的多个焦点构成的区域。

3. 发明公开

US20230152514A1 GAIN FLATTENING FILTER, AND METHOD FOR MANUFACTURING GAIN FLATTENING FILTER 审中-公开
公开(公告)号：US20230152514A1
公开(公告)日：2023-05-18
申请号：US17917493
申请日：2021-04-05
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. , SUMITOMO ELECTRIC OPTIFRONTIER CO., LTD.
发明人： Shigehiro NAGANO , Takemi HASEGAWA , Jun KINUGASA , Kazuaki MASUI
IPC分类号： G02B6/036 , G02B6/02
CPC分类号： G02B6/03694 , G02B6/03622 , G02B6/02052
摘要： A gain flattening filter includes a first optical fiber that has 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.

4. 发明申请

US20190207358A1 OPTICAL AMPLIFIER AND MULTI-CORE OPTICAL FIBER 审中-公开
公开(公告)号：US20190207358A1
公开(公告)日：2019-07-04
申请号：US16293883
申请日：2019-03-06
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Takemi HASEGAWA , Tetsuya HAYASHI , Yoshiaki TAMURA , Hirotaka SAKUMA , Shigehiro NAGANO
IPC分类号： H01S3/067 , H01S3/16 , H01S3/094
CPC分类号： H01S3/06737 , G02B6/02 , H01S3/067 , H01S3/06733 , H01S3/06754 , H01S3/094003 , H01S3/094042 , H01S3/094065 , H01S3/10 , H01S3/1608
摘要： The present embodiment relates to an optical amplifier and the like having a structure for enabling efficient use of pumping light while avoiding complication of a device structure. In such an optical amplifier, since pumping light from a pumping light source is supplied to each core of an amplification MCF, a coupling MCF in which adjacent cores form a coupled core is arranged between the amplification MCF and the pumping light source. The pumping light source is optically connected to a specific core of the coupling MCF, and pumping light is coupled from the specific core to remaining cores except the specific core in the coupling MCF before pumping light is supplied to each core of the amplification MCF. This enables coupling of pumping light between optically connected cores between the amplification MCF and the coupling MCF.

5. 发明申请

US20210223468A1 SLANT-TYPE FIBER GRATING 有权
公开(公告)号：US20210223468A1
公开(公告)日：2021-07-22
申请号：US17223424
申请日：2021-04-06
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Shigehiro NAGANO , Manabu SHIOZAKI , Jun KINUGASA , Takemi HASEGAWA
IPC分类号： G02B6/02
摘要： One embodiment of the present disclosure relates to an SFG (slanted fiber grating) that can easily realize a high-performance gain equalizer. The SFG includes an optical fiber comprised of silica-based glass and including a core, a first cladding containing a photosensitive material, and a second cladding. A specific section between two different points arranged along a fiber axis in the optical fiber is configured with a first region, a pair of second regions, and a third region. The first region includes a slanted Bragg grating provided in a region as the first cladding. The pair of second regions are arranged to sandwich the first region. The third region is disposed to sandwich both the first region and the pair of second regions. An MFD at a wavelength of 1.55 μm in the third region is smaller than an MFD at a wavelength of 1.55 μm in the first region.

6. 发明申请

US20210026222A1 WAVELENGTH CONVERSION OPTICAL DEVICE AND METHOD FOR MANUFACTURING WAVELENGTH CONVERSION OPTICAL DEVICE 有权
公开(公告)号：US20210026222A1
公开(公告)日：2021-01-28
申请号：US17039223
申请日：2020-09-30
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Shigehiro NAGANO
IPC分类号： G02F1/377 , G02F1/35 , B23K26/40 , B23K26/073
摘要： A wavelength conversion optical device includes: a substrate having a virtual plane and first and second regions and including multiple first crystal regions and multiple second crystal regions. Each of the multiple first crystal regions includes a pair of portions arranged in a direction intersecting a first plane with the first plane interposed therebetween, the first plane being located in the first region, and directions of spontaneous polarizations of each of the pair of portions being directions away from the first plane. Each of the multiple second crystal regions includes a pair of portions arranged in a direction intersecting a second plane with the second plane interposed therebetween, the second plane being located in the second region. Directions of spontaneous polarizations of each of the pair of portions being directions away from the second plane.

7. 发明申请

US20200324376A1 OPTICAL DEVICE AND METHOD FOR MANUFACTURING OPTICAL DEVICE 审中-公开
公开(公告)号：US20200324376A1
公开(公告)日：2020-10-15
申请号：US16912808
申请日：2020-06-26
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Shigehiro NAGANO , Tetsu MORISHIMA
IPC分类号： B23K26/53 , B29D11/00
摘要： A method for manufacturing an optical device according to an embodiment comprises: loading hydrogen into a glass member containing Ge; irradiating a laser beam from a femtosecond laser into the glass member having the hydrogen loaded therein, the laser beam having an amount of energy causing a light-induced change in refractive index of the glass member and having a repetition frequency of 10 kHz or higher; and moving a light convergence point position of the laser beam relative to the glass member. A repetition of the irradiating and the moving forms a continuous refractive index changed region in the glass member.

8. 发明申请

US20200225408A1 OPTICAL DEVICE AND METHOD FOR MANUFACTURING OPTICAL DEVICE 审中-公开
公开(公告)号：US20200225408A1
公开(公告)日：2020-07-16
申请号：US16836233
申请日：2020-03-31
申请人： Sumitomo Electric Industries, Ltd.
发明人： Shigehiro NAGANO
IPC分类号： G02B6/036 , G02F1/383 , G02B6/032
摘要： An embodiment of the invention relates to an optical device which is capable of realizing a secondary nonlinear optical phenomenon. The optical device is a fiber-type optical device which is comprised of glass containing SiO2, and includes a core region, a first cladding region, and a second cladding region. At least a part of a glass region configured by the core region and the first cladding region has such a repetition structure that a first section serving as a poled crystal region and a second section serving as an amorphous region are alternately disposed along a longitudinal direction of the optical device.

9. 发明申请

US20220196908A1 OPTICAL FIBER AND OPTICAL FIBER FILTER 有权
公开(公告)号：US20220196908A1
公开(公告)日：2022-06-23
申请号：US17557216
申请日：2021-12-21
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD. , Sumitomo Electric Optifrontier Co., Ltd.
发明人： Shigehiro NAGANO , Takemi HASEGAWA , Masakazu SHIGEHARA , Masayuki YAMAZAKI
IPC分类号： G02B6/02
摘要： An optical fiber includes a silica-based glass. The optical fiber includes a core, an optical cladding surrounding the core, and a physical cladding surrounding the optical cladding. The optical cladding includes a first region in contact with the core and surrounding the core. A photosensitive material is added to the core and the first region. A concentration of the photosensitive material in the first region is 30% or more of a concentration of the photosensitive material in the core. A value obtained by integrating a light intensity of an LP01 mode at a wavelength of 1310 nm in a region added with the photosensitive material is 87% or more of a value obtained by integrating the light intensity in an entire region of the optical fiber.

10. 发明申请

US20210080650A1 OPTICAL DEVICE PRODUCTION METHOD 有权
公开(公告)号：US20210080650A1
公开(公告)日：2021-03-18
申请号：US17098793
申请日：2020-11-16
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Shigehiro NAGANO
IPC分类号： G02B6/13 , C03C21/00
摘要： A method for manufacturing an optical device includes a hydrogen-loading step, a laser irradiation step, and a light condensing point movement step. The laser irradiation step and the light condensing point movement step are alternately repeated, or are performed in parallel. In the hydrogen-loading step, hydrogen is loaded into a glass member containing B2O3 and has a content of GeO2 less than 10% by mass fraction based on an oxide. In the laser irradiation step, a femtosecond laser beam having a repetition frequency of 10 kHz or higher is condensed and emitted into the glass member into which the hydrogen is loaded, and a light-induced change in refractive index is caused in the glass member. In the light condensing point movement step, a light condensing point position of the femtosecond laser beam is moved relative to the glass member.

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