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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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公开(公告)号：US20230219167A1
公开(公告)日：2023-07-13
申请号：US18185415
申请日：2023-03-17
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Atsushi OGINO , Ryosuke TAMURA , Kousuke KASHIWAGI , Masakazu YOSHIHARA , Keisuke TOMINAGA , Takashi KAYAHARA , Keigo MATSUNAGA
IPC: B23K26/0622 , B23K26/08
CPC classification number: B23K26/0622 , B23K26/0869 , B23K2101/18
Abstract: A laser processing method of laser processing a workpiece made of at least one sheet of metallic foil includes: generating laser light by supplying pulsed pumping energy to a laser medium, the laser light including an optical pulse component and a continuous light component that is continuous with the optical pulse component and temporally after the optical pulse component; irradiating a surface of the workpiece with the laser light; and limiting duration of the continuous light component such that a ratio of energy of the continuous light component to energy of the optical pulse component is equal to or less than a predetermined value.
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公开(公告)号：US20210086295A1
公开(公告)日：2021-03-25
申请号：US17115013
申请日：2020-12-08
Applicant: FURUKAWA ELECTRIC CO., LTD.
Inventor： Ryosuke NISHII , Kousuke KASHIWAGI , Takashi KAYAHARA , Tomomichi YASUOKA , Takashi SHIGEMATSU
IPC: B23K26/067 , B23K26/21 , B23K26/06
Abstract: A welding method includes: disposing a workpiece formed by stacking a plurality of metal foils in an area to be irradiated with laser light that contains a plurality of beams; irradiating a surface of the workpiece with the beams of the laser light by dispersing positions of the beams such that centers of the beams do not overlap with each other within a prescribed area on the surface; melting an irradiated part of the workpiece and performing welding; and setting each of the beams to have a power density with which no hole opens in the metal foils, and setting the power density of the beams and dispersing irradiating positions to be emitted so as to form a weld pool penetrating the workpiece by the beams.
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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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