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1. 发明公开

EP3780298A1 FIBER LASER DEVICE, PRODUCTION METHOD FOR FIBER LASER DEVICE, AND SETTING METHOD 有权
公开(公告)号：EP3780298A1
公开(公告)日：2021-02-17
申请号：EP19775175.3
申请日：2019-03-27
申请人： Fujikura, Ltd.
发明人： SAKAMOTO, Shinichi
IPC分类号： H01S3/067 , H01S3/00
摘要： An increase in power of Raman scattered light is suppressed, and thereby a possibility that oscillation of laser light becomes unstable is reduced. A Raman filter (RF) which reflects part of Raman scattered light is provided to a fiber laser device (FL) so that 10 (2×g1×L1-am)/10 +10 (2×g1×L1+2×g2×L2-2×at-ar)/10 (2×g1×L1-2×g2×L2-ar) is satisfied.

2. 发明公开

EP3657617A1 LASER DEVICE, AND METHOD FOR ESTIMATING DEGREE OF DETERIORATION OF LIGHT SOURCE OF LASER DEVICE 审中-公开
公开(公告)号：EP3657617A1
公开(公告)日：2020-05-27
申请号：EP18836099.4
申请日：2018-06-27
申请人： Fujikura Ltd.
发明人： SAKAMOTO, Shinichi
IPC分类号： H01S5/06 , H01S3/0941 , H01S5/40
摘要： The laser device (1) includes a light source (2) including a plurality of laser diodes (21); a driving current peak hold unit (52) that holds a maximum value within a predetermined period of a driving current applied to the plurality of laser diodes (21); an optical power peak hold unit (53) that holds a maximum value within the predetermined period of a power of light emitted from the light source (2); a memory (56) that stores a relationship between a magnitude of the driving current, a magnitude of the power of the light, and a degree of deterioration of the light source (2); and a degree-of-deterioration estimation unit (54) that refers to the memory (56) to estimate the degree of deterioration from the maximum value within the predetermined period of the driving current held in the driving current peak hold unit (52) and the maximum value within the predetermined period of the power of the light held in the optical power peak hold unit (53).

3. 发明公开

EP3312950A1 LASER DEVICE AND LASER DEVICE MANUFACTURING METHOD 审中-公开
标题翻译：激光装置和激光装置制造方法
公开(公告)号：EP3312950A1
公开(公告)日：2018-04-25
申请号：EP16811264.7
申请日：2016-02-26
申请人： Fujikura Ltd.
发明人： SAKAMOTO, Shinichi , KASAI, Yohei
IPC分类号： H01S5/022 , H01L23/36 , H01S5/024
CPC分类号： H01S5/02256 , H01L23/36 , H01S5/0207 , H01S5/022 , H01S5/02236 , H01S5/02268 , H01S5/02272 , H01S5/024 , H01S5/02469
摘要： In a laser device 1 in which a laser module 2 is mounted on a heat sink 3, a base plate 20 of the laser module 2 is fixed onto a mounting surface 3s of the heat sink 3 in such a manner that a peripheral part 20b is fixed to the heat sink 3 with screws. The elastic force of the base plate 20 causes stress in the direction toward the mounting surface 3s on the central part 20a of the base plate 20 surrounded by the peripheral part 20b.
摘要翻译：在激光模块2被安装在散热器3上的激光装置1中，激光模块2的基板20被固定到散热器3的安装表面3s上，使得周边部分20b 用螺丝固定在散热器3上。底板20的弹性力在由周边部分20b围绕的底板20的中心部分20a上产生朝向安装表面3s的方向上的应力。

4. 发明公开

EP2891911A1 LIGHT GUIDING DEVICE, METHOD FOR PRODUCING SAME, AND LD MODULE 审中-公开
标题翻译：光引导装置，用于制造该装置的方法以及LD模块
公开(公告)号：EP2891911A1
公开(公告)日：2015-07-08
申请号：EP13832216.9
申请日：2013-08-13
申请人： FUJIKURA LTD.
发明人： KUMETA, Shohei , SAKAMOTO, Shinichi
IPC分类号： G02B6/42 , H01S5/40
CPC分类号： G02B26/0816 , G02B6/42 , G02B6/4204 , G02B6/4214 , G02B6/4296 , H01S5/005 , H01S5/0071 , H01S5/02248 , H01S5/02284 , H01S5/4012 , H01S5/4031
摘要： A light-guiding device that converts an input beam bundle made of a plurality of laser beams that have respectively been emitted from a plurality of LD elements, to an output beam bundle made of a plurality of output beams, includes a plurality of double mirrors each corresponding to a corresponding one of the LD elements LDi, the double mirrors being separated from one another. The double mirrors Mi each are made of a first mirror Mi1 that is mounted on a top surface of a base plate B and a second mirror Mi2 that is mounted on a top surface the first mirror Mi1. The first mirror has a first reflective surface whose normal makes an angle of 45° with a normal of the top surface of the base plate. The second mirror has a second reflective surface whose normal makes an angle of 135° with the normal of the top surface of the base plate. The laser beams respectively emitted from the LD elements respectively corresponding to the double mirrors each are first reflected by the first reflective surface and then further reflected by the second reflective surface. By adjusting orientations and positions of the first mirror and the second mirror, it is possible to adjust a propagation direction of each of the output beams.
摘要翻译：将由多个LD元件分别发射的多个激光束构成的输入光束转换成由多个输出光束构成的输出光束的光导装置包括多个双反射镜，每个双反射镜各自对应于LD元件LDi中相应的一个，双镜彼此分开。双反射镜Mi分别由安装在基板B的上表面上的第一反射镜Mi1和安装在第一反射镜Mi1的上表面上的第二反射镜Mi2构成。第一反射镜具有第一反射表面，该第一反射表面的法线与基板的顶表面的法线形成45°的角度。第二反射镜具有第二反射表面，其法线与基板的顶表面的法线成135°的角度。从分别对应于双反射镜的LD元件分别发射的激光束首先被第一反射表面反射，然后被第二反射表面反射。通过调整第一反射镜和第二反射镜的方位和位置，可以调整每个输出光束的传播方向。

5. 发明公开

EP3933370A1 LASER DEVICE 审中-实审
公开(公告)号：EP3933370A1
公开(公告)日：2022-01-05
申请号：EP20762832.2
申请日：2020-02-27
申请人： Fujikura Ltd.
发明人： HASUNUMA, Takashi , SAKAMOTO, Shinichi , CHIBA, Yasuto , KIYOYAMA, Wataru , YAMAGUCHI, Yutaka
IPC分类号： G01M11/00 , H01S3/00
摘要： A laser device includes at least one light source; a delivery fiber configured to propagate laser light launched from the light source; a monitor fiber optically coupled to the delivery fiber and configured to propagate a part of the light propagating in a direction opposite to a propagation direction of the laser light in the delivery fiber, and a light receiving unit configured to receive the light propagated by the monitor fiber. The light receiving unit is configured to detect first light included in a wavelength band of visible light.

6. 发明公开

EP3176889A1 LD MODULE 有权
标题翻译： LD模块
公开(公告)号：EP3176889A1
公开(公告)日：2017-06-07
申请号：EP15840866.6
申请日：2015-09-14
申请人： Fujikura Ltd.
发明人： SAKAMOTO, Shinichi
IPC分类号： H01S5/20 , G02B6/42 , H01S5/022
CPC分类号： H01S5/02252 , G02B6/42 , H01S5/005 , H01S5/022 , H01S5/02284 , H01S5/02288 , H01S5/20 , H01S5/2036 , H01S5/4012 , H01S2301/16
摘要： An emitter width W LD of an LD (11) is set so as to be greater than a diameter D c , of a core (121), in an entrance end surface (12S) of an optical fiber (12). An optical system (13) provided between the LD (11) and the optical fiber (12) is configured to cause a diameter D B , of a laser beam, in the entrance end surface (12S) of the optical fiber (12) to become smaller than the diameter D c , of the core, in the entrance end surface (12S) of the optical fiber (12). This causes an enhancement in reliability of the LD (11) without causing a reduction in efficiency of coupling the LD (11) with the optical fiber (12).
摘要翻译： LD（11）的发射极宽度WLD被设定为大于光纤（12）的入射端面（12S）中的芯（121）的直径Dc。设置在LD（11）与光纤（12）之间的光学系统（13）被配置为使得光纤（12）的入射端面（12S）中的激光束的直径DB变为小于光纤（12）的入射端面（12S）中的芯的直径Dc。这导致LD（11）的可靠性提高，而不会导致LD（11）与光纤（12）耦合的效率的降低。

7. 发明公开

EP3125009A1 LIGHT GUIDE DEVICE, MANUFACTURING METHOD, AND LD MODULE 有权
标题翻译： LICHTLEITERVORRICHTUNG，HERSTELLUNGSVERFAHREN UND LD-MODUL
公开(公告)号：EP3125009A1
公开(公告)日：2017-02-01
申请号：EP15769947.1
申请日：2015-03-17
申请人： Fujikura Ltd.
发明人： SAKAMOTO, Shinichi , KUMETA, Shohei
IPC分类号： G02B6/42 , H01S5/022 , H01S5/40
CPC分类号： G02B6/2817 , G02B5/04 , G02B6/0031 , G02B6/32 , G02B6/34 , G02B6/4206 , G02B6/4226 , G02B6/4239 , G02B6/4244 , G02B6/43 , G02B17/006 , G02B19/0057 , G02B27/30 , H01S5/0014 , H01S5/005 , H01S5/0071 , H01S5/02252 , H01S5/02284 , H01S5/4012 , H01S5/4031
摘要： A double mirror (Mi) of a light-guiding device of the present invention is made of (i) a first mirror (Mi1) that is mounted on a top surface of a base plate (B) and has a reflective surface (S1) reflecting an input beam reflected by the reflective surface (S1) and (ii) a second mirror (Mi2) that is mounted on a top surface of the first mirror (Mi1) and is a prism having a reflective surface (S2) reflecting the input beam that has been reflected by the reflective surface (S1), the input beam reflected by the reflective surface (S2) being totally reflected inside the prism.
摘要翻译：本发明的导光装置的双镜（Mi）由（i）安装在基板（B）的上表面上并具有反射面（S1）的第一反射镜（Mi1）构成，反射由所述反射表面（S1）反射的输入光束和（ii）安装在所述第一反射镜（Mi1）的顶表面上的第二反射镜（Mi2），并且是具有反射所述输入的反射表面（S2）的棱镜由反射面反射的光束（S1），由反射面（S2）反射的输入光束在棱镜内全反射。

8. 发明公开

EP2458695A1 FIBER LASER APPARATUS 审中-公开
标题翻译： FASERLASERGERÄT
公开(公告)号：EP2458695A1
公开(公告)日：2012-05-30
申请号：EP11744664.1
申请日：2011-02-16
申请人： Fujikura, Ltd.
发明人： SAKAMOTO, Shinichi
IPC分类号： H01S3/131 , H01S3/042 , H01S3/06 , H01S3/094
CPC分类号： H01S3/06754 , H01S3/0404 , H01S3/042 , H01S3/06704 , H01S3/09408 , H01S3/09415 , H01S3/10007 , H01S5/02248 , H01S5/02407 , H01S5/02446 , H01S5/0612 , H01S5/4025
摘要： A PA section (3) of a fiber laser device includes: an amplifying fiber (4); an LD (5) for exciting the amplifying fiber (4); an LD heat sink (6a) that absorbs heat generated by the LD (5); and an LD fan (7a), a thermistor (8), and a CPU (9) that control a heat resistance R th of the LD heat sink (6a). A temperature of the LD (5) is controlled to approach T peak by changing the heat resistance R th of the LD heat sink (6a), where T peak is a temperature at which a lasing wavelength of the LD (5) equals a wavelength at which an absorptance by the amplifying fiber (4) peaks.
摘要翻译：光纤激光器件的PA部分（3）包括：放大光纤（4）; 用于激励放大光纤（4）的LD（5）; 吸收由LD（5）产生的热量的LD散热器（6a）; 以及控制LD散热器（6a）的耐热性Rth的LD风扇（7a），热敏电阻（8）和CPU（9）。通过改变LD散热器（6a）的耐热性R th来控制LD（5）的温度接近T峰，其中T peak是LD（5）的激光波长等于波长的温度其中放大纤维（4）的吸收峰达到峰值。

9. 发明公开

EP4138235A1 OPTICAL DEVICE AND FIBER LASER APPARATUS 审中-实审
公开(公告)号：EP4138235A1
公开(公告)日：2023-02-22
申请号：EP21788419.6
申请日：2021-02-19
申请人： Fujikura Ltd.
发明人： MASHIKO, Yasuhiro , SAKAMOTO, Shinichi , NAMIKI, Sho
IPC分类号： H01S3/067
摘要： This optical device includes: a resonator fiber including an HR-FBG, a resonator fiber including an OC-FBG, and an amplifying fiber having an end portion connected to the resonator fiber and an end portion connected to the resonator fiber, and having a normalized frequency equal to 5.13 or higher. The amplifying fiber is wound so as not to intersect on one plane and so as to have an end located on an inside thereof, and has an outer section in which the amplifying fiber is wound in a circular manner and an inner section in which the amplifying fiber is wound so as to have at least two arc portions having a radius of curvature set such that a higher-order mode higher than an LP11 mode has loss.

10. 发明公开

EP3883071A1 FIBER LASER DEVICE 审中-公开
公开(公告)号：EP3883071A1
公开(公告)日：2021-09-22
申请号：EP20760291.3
申请日：2020-02-21
申请人： Fujikura Ltd.
发明人： NAKANISHI, Yasuo , MASHIKO, Yasuhiro , SAKAMOTO, Shinichi , SHIMA, Kensuke
IPC分类号： H01S3/067 , G02B6/02
摘要： Provided is a fiber laser device including a pumping light source configured to output pumping light; an amplifying fiber including a core doped with a rare earth element excitable by the pumping light from the pumping light source; an input side fiber fusion-spliced on an input side of the amplifying fiber and formed with a HR-FBG; an output side fiber fusion-spliced on an output side of the amplifying fiber and formed with an OC-FBG, the OC-FBG having a reflectivity smaller than a reflectivity of the HR-FBG; an output end configured to output laser beams; and a mode filter configured to remove at least a portion of a predetermined higher-order mode from the core of the amplifying fiber. The input side fiber or an intermediate fiber disposed between the amplifying fiber and the input side fiber is fusion-spliced with the amplifying fiber via a fusion splice portion, and at least a portion of the mode filter is disposed in a region between the fusion splice portion and a position separated from the fusion splice portion by a coherence length of beating caused by mode interference of signal light propagating in the amplifying fiber.

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