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

IPC: G02B6/293 ,  H01S5/40 ,  H01S5/024 ,  H01S3/094 ,  H01S5/022 ,  G02B6/44 ,  H01S3/067

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。

公开(公告)号：US20150229095A1

公开(公告)日：2015-08-13

申请号：US14688709

申请日：2015-04-16

Applicant: Furukawa Electric Co., Ltd. ,  Komatsu Ltd.

Inventor： Taizo MIYATO ,  Kanji TANAKA ,  Koji KAJIWARA ,  Akira FUJISAKI ,  Seiichi HAYASHI

IPC: H01S3/091 ,  H01S3/23 ,  H01S3/094 ,  H01S3/0941 ,  H01S3/067 ,  H01S3/08

CPC classification number: H01S3/0912 ,  H01S3/067 ,  H01S3/06716 ,  H01S3/0675 ,  H01S3/06754 ,  H01S3/08009 ,  H01S3/094003 ,  H01S3/09408 ,  H01S3/0941 ,  H01S3/10069 ,  H01S3/1312 ,  H01S3/2308

Abstract: A laser device includes an optical fiber laser unit including an amplification optical fiber, a plurality of pumping light sources outputting pumping lights for optically pumping the amplification optical fiber, and a controller controlling the pumping light sources. When an instruction value for supplying a predetermined driving electric current to each of the pumping light sources is input to the controller, the controller conducts a control of supplying a compensated electric current value as a driving electric current obtained by multiplying an initial electric current value corresponding to the instruction value by a compensation coefficient and supplying the compensated electric current value to each of the pumping light sources. The compensation coefficient is set to restrain a decrease in a power with time of a laser light output from the optical fiber laser unit.

Abstract translation: 激光装置包括：包括放大光纤的光纤激光器单元，输出用于光学泵浦放大光纤的泵浦光的多个泵浦光源;以及控制泵浦光源的控制器。 当向控制器输入用于向每个泵浦光源提供预定的驱动电流的指令值时，控制器执行将补偿电流值提供作为驱动电流的控制，该驱动电流是通过将对应于 通过补偿系数提供给指令值，并将补偿的电流值提供给每个泵浦光源。 补偿系数被设定为抑制从光纤激光单元输出的激光的时间的降低。