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公开(公告)号：US20190089113A1
公开(公告)日：2019-03-21
申请号：US16194071
申请日：2018-11-16
Applicant: Furukawa Electric Co., Ltd.
Inventor： Kosuke KASHIWAGI , Akira FUJISAKI , Yoshihiro EMORI
IPC: H01S3/067 , B23K26/042
Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a core and that propagates a fundamental mode and a low-order mode is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of the amplification optical fiber, a cladding light attenuating section that attenuates light which has propagated through a cladding of the amplification optical fiber, at a subsequent stage of the amplification optical fiber, and a drive unit that drives the visible laser light source to emit the visible laser light through a core of the output optical fiber in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece.
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公开(公告)号：US20220003950A1
公开(公告)日：2022-01-06
申请号：US17479269
申请日：2021-09-20
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Takahiro TOMIYASU , Hirotatsu ISHII , Yoshihiro EMORI , Kenichi SUYAMA , Kouji MOCHIDUKI
IPC: G02B6/44
Abstract: An optical processing structure of an optical fiber, includes: an optical fiber that includes a core, a cladding, and a coating, the coating being partially removed; and a thermally conductive protective material made of a silicone-based thermally conductive compound and provided around the cladding in a coating removed region of the optical fiber. Further, the thermally conductive protective material contains a filler having a refractive index higher than a refractive index of the cladding, and the filler is present in a region where evanescent light seeping out of the cladding is present when cladding mode light propagating in the cladding is totally reflected.
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Patent Agency Ranking
公开(公告)号：US20200083661A1
公开(公告)日：2020-03-12
申请号：US16684040
申请日：2019-11-14
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Koji KAJIWARA , Takeshi TAKAGI , Kousuke KASHIWAGI , Kazuaki HYUGA , Yoshihiro EMORI
Abstract: An optical fiber laser device generates laser light by using an optical amplifying fiber as an amplification medium in a laser oscillator and includes: an optical outputting fiber configured to emit laser light to an outside; a return-light-attenuating portion configured to perform an attenuation process to return light propagating through at least the optical outputting fiber in a reverse direction of the laser light; a thermal conversion unit provided at the return-light-attenuating portion and configured to convert the return light into heat; a temperature-monitoring device configured to measure an increase in a temperature, of the return-light-attenuating portion, caused by the heat converted by the thermal conversion unit; and a control unit configured to decrease or stop an output of the laser light when the temperature measured by the temperature-monitoring device becomes a predetermined threshold temperature or higher.
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公开(公告)号：US20160291252A1
公开(公告)日：2016-10-06
申请号：US15175134
申请日：2016-06-07
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Kousuke KASHIWAGI , Yoshihiro EMORI , Kanji TANAKA
CPC classification number: G02B6/29398 , G02B6/04 , G02B6/2938 , G02B6/3801 , G02B6/4201 , G02B6/4268 , G02B6/4478 , H01S3/042 , H01S3/06704 , H01S3/0675 , H01S3/06754 , H01S3/094007 , H01S3/094053 , H01S3/094069 , H01S3/09408 , H01S3/09415 , H01S5/02248 , H01S5/02284 , H01S5/02469 , H01S5/4012 , H01S5/4025
Abstract: A laser unit includes: multi-mode semiconductor lasers configured to output laser lights in multi-mode; an optical multiplexer configured to multiplex and output the laser lights; a multi-mode optical fiber configured to connect the multi-mode semiconductor lasers to the optical multiplexer, and including a core portion, a cladding portion, and a coated portion; a first bending portion formed to the multi-mode optical fiber and bent with a predetermined bending length and at a predetermined first bending radius; a radiation portion formed outside the coated portion at the first bending portion, and configured to radiate heat of the multi-mode optical fiber; and a second bending portion formed to the multi-mode optical fiber between the first bending portion and the optical multiplexer and bent at a predetermined second bending radius, wherein increase in a temperature at the second bending portion is restrained by radiation from the radiation portion.
Abstract translation: 激光单元包括：多模半导体激光器，被配置为以多模式输出激光; 配置为复用和输出激光的光复用器; 多模光纤被配置为将多模半导体激光器连接到光复用器，并且包括芯部，包层部分和涂覆部分; 第一弯曲部分，形成于所述多模光纤上，并以预定的弯曲长度和预定的第一弯曲半径弯曲; 形成在所述第一弯曲部的所述被覆部的外侧的被配置为散射所述多模光纤的热的辐射部; 以及第二弯曲部，其在所述第一弯曲部和所述光复用器之间形成为所述多模光纤，并且以预定的第二弯曲半径弯曲，其中，所述第二弯曲部处的温度的增加被来自所述辐射部的辐射抑制。
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5.发明申请Fiber Laser Apparatus and Method of Aligning Laser Light Irradiation Position 审中-公开光纤激光装置及对准激光照射位置的方法公开(公告)号：US20130299474A1
公开(公告)日：2013-11-14
申请号：US13944415
申请日：2013-07-17
Applicant: Furukawa Electric Co. Ltd.
Inventor： Kosuke KASHIWAGI , Akira FUJISAKI , Yoshihiro EMORI
CPC classification number: H01S3/0675 , B23K26/042 , H01S3/067 , H01S3/06754 , H01S3/094003 , H01S3/09415 , H01S3/10038 , H01S3/2375 , H01S3/2391
Abstract: A fiber laser apparatus that generates invisible laser light using an amplification optical fiber having a single-mode core and outputs the invisible laser light via an output optical fiber is provided. The fiber laser apparatus includes a visible laser light source that generates visible laser light, an introducing section that introduces the visible laser light generated by the visible laser light source into a core of one of the amplification optical fiber and the output optical fiber, and a drive unit that drives, in a case of performing alignment of an irradiation position of the invisible laser light with respect to a workpiece, the visible laser light source and emits the visible laser light via the core of the output optical fiber.
Abstract translation: 提供一种使用具有单模核心的放大光纤产生不可见激光并通过输出光纤输出不可见激光的光纤激光装置。 光纤激光装置包括产生可见激光的可见激光光源，将由可见激光光源产生的可见激光引入放大光纤和输出光纤之一的核心的导入部，以及 驱动单元，在对不可见激光的照射位置相对于工件进行对准的情况下，驱动所述可见激光光源，并通过所述输出光纤的纤芯发射所述可见激光。
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公开(公告)号：US20240014622A1
公开(公告)日：2024-01-11
申请号：US18472597
申请日：2023-09-22
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Shigehiro TAKASAKA , Yoshihiro EMORI , Shinichi ARAI , Ryuichi SUGIZAKI
CPC classification number: H01S3/06737 , H01S3/094003
Abstract: A laser device includes: a seed light source configured to output a laser light having a single mode; a multicore fiber including at least one core group having at least one core, each of the core in the core group being optically coupled to neighboring cores; and an optical coupler configured to input the laser light to the core group, wherein in the multicore fiber, the laser light propagates through the core group in a super mode representing propagation mode of the core group.
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公开(公告)号：US20170110847A1
公开(公告)日：2017-04-20
申请号：US15393709
申请日：2016-12-29
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Koji KAJIWARA , Takeshi TAKAGI , Kousuke KASHIWAGI , Kazuaki HYUGA , Yoshihiro EMORI
Abstract: An optical fiber laser device generates laser light by using an optical amplifying fiber as an amplification medium in a laser oscillator and includes: an optical outputting fiber configured to emit laser light to an outside; a return-light-attenuating portion configured to perform an attenuation process to return light propagating through at least the optical outputting fiber in a reverse direction of the laser light; a thermal conversion unit provided at the return-light-attenuating portion and configured to convert the return light into heat; a temperature-monitoring device configured to measure an increase in a temperature, of the return-light-attenuating portion, caused by the heat converted by the thermal conversion unit; and a control unit configured to decrease or stop an output of the laser light when the temperature measured by the temperature-monitoring device becomes a predetermined threshold temperature or higher.
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