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1. 发明专利

JP2012129426A Multiport coupler, and optical fiber amplifier, fiber laser device and resonator with using the same 有权
标题翻译：多功能耦合器和光纤放大器，光纤激光器和谐振器
公开(公告)号：JP2012129426A
公开(公告)日：2012-07-05
申请号：JP2010281065
申请日：2010-12-16
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： NGUYEN PHI KHANH , KITABAYASHI KAZUHIRO
IPC分类号： H01S3/10 , G02B6/02 , G02B6/036 , G02B6/26 , H01S3/067
摘要： PROBLEM TO BE SOLVED: To provide a multiport coupler, and an optical fiber amplifier, a fiber laser device and a resonator with using the same, capable of achieving high light beam quality to be output.SOLUTION: A multiport coupler 3 includes: an optical fiber for signal light 15; optical fibers for excitation light 25; and a bridge fiber 50 of which one end side is reduced in diameter. The optical fiber for signal light 15 and each of the optical fibers for excitation light 25 are connected to the bridge fiber 50 from the other end side of the bridge fiber 50 which is not reduced in diameter. A refractive index of an inside clad 57 of the bridge fiber 50 is set to be lower than a refractive index of a core 56 and higher than a refractive index of an outside clad 58. If r1 represents an outer diameter of the inside clad 57 on the part which is not reduced in diameter, r2 represents the smallest diameter on the part which is reduced in diameter, NA0 represents a numerical aperture of the core 16 of the optical fiber for signal light 15, and NA1 represents a numerical aperture of the inside clad 57, the following formula is satisfied: (r1/r2)×NAO≥NA1.
摘要翻译：要解决的问题：提供能够实现高光束质量输出的多端口耦合器，光纤放大器，光纤激光器件和使用该谐振器的谐振器。解决方案：多端口耦合器3包括：用于信号光15的光纤; 用于激发光的光纤25; 以及其一端侧的直径减小的桥式纤维50。用于信号光15的光纤和用于激发光25的每个光纤从桥式光纤50的另一端侧连接到桥式光纤50，该桥式光纤50的直径没有减小。桥式纤维50的内包层57的折射率被设定为低于芯56的折射率并高于外包层58的折射率。如果r1表示内包层57的外径，则直径不减小的部分r2表示直径减小的部分的最小直径，NA0表示用于信号光15的光纤的芯16的数值孔径，NA1表示内部的数值孔径包层57，满足以下公式：（r1 / r2）×NAO≥NA1。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2007234943A Fiber laser and stabilization method of its output 有权
标题翻译：光纤激光器及其输出的稳定方法
公开(公告)号：JP2007234943A
公开(公告)日：2007-09-13
申请号：JP2006056061
申请日：2006-03-02
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , NAKAI MICHIHIRO , SAKAI TETSUYA
IPC分类号： H01S3/06 , H01S3/083
摘要： PROBLEM TO BE SOLVED: To provide a method for solving a problem of a first pulse in a fiber laser, and the fiber laser which makes it difficult to cause the first pulse. SOLUTION: The fiber laser comprises a seed light pulse light source for generating pulse light serving as a seed light, and an optical fiber amplifier connected to an output terminal of the seed light pulse light source for amplifying and outputting the seed light pulse. In a method for stabilizing the pulse output of the fiber laser, after a stable output pulse is output from the seed light pulse light source, the optical fiber amplifier starts to amplify, whereby a pulse to be output from the fiber laser is stabilized. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种解决光纤激光器中的第一脉冲的问题的方法和使得难以引起第一脉冲的光纤激光器。解决方案：光纤激光器包括用于产生用作种子光的脉冲光的种子光脉冲光源和连接到种子光脉冲光源的输出端的光纤放大器，用于放大和输出种子光脉冲。在用于稳定光纤激光器的脉冲输出的方法中，在从种子光脉冲光源输出稳定的输出脉冲之后，光纤放大器开始放大，由此光纤激光器输出的脉冲是稳定的。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2005003871A Optical connector 审中-公开
标题翻译：光学连接器
公开(公告)号：JP2005003871A
公开(公告)日：2005-01-06
申请号：JP2003166464
申请日：2003-06-11
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G02B6/38 , G02B6/26
摘要： PROBLEM TO BE SOLVED: To provide an optical connector which can optically connect optical fibers with high accuracy without bringing the ferrules attached to the respective ends of the optical fiber pair into contact with each other. SOLUTION: The ferrules 21, 22 are attached to the ends of coated optical fibers 11, 12, respectively, and butted to each other in the sleeve 30 to optically connect the coated optical fibers 11, 12 in the optical connector 10. In this connector, a gap 25 is formed between the end faces of the ferrules 21, 22, and the gap 25 is controlled to ≤300 μm. The length D 1 of the sleeve 30 and the sum length D 2 of the ferrules 21, 22 inserted into the sleeve 30 satisfy 0 1 -D 2 ≤300 μm. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种光学连接器，其可以在不使附接到光纤对的各个端部的套圈彼此接触的情况下以高精度光学连接光纤。解决方案：套管21,22分别在套筒30中分别附接到涂覆光纤11,12的端部并彼此对接，以光学连接光学连接器10中的涂覆光纤11,12。在该连接器中，在套圈21,22的端面之间形成间隙25，将间隙25控制为≤300μm。套筒30的长度D 1 和插入套筒30中的套圈21,22的总和长度D 2 满足0 1 -D 2 ≤300μm。版权所有（C）2005，JPO＆NCIPI

4. 发明专利

JP2014225584A ファイバレーザ装置审中-公开
标题翻译：光纤激光器件
公开(公告)号：JP2014225584A
公开(公告)日：2014-12-04
申请号：JP2013104563
申请日：2013-05-16
申请人：株式会社フジクラ , Fujikura Ltd
发明人： KITABAYASHI KAZUHIRO
IPC分类号： H01S3/067 , H01S3/086
CPC分类号： H01S3/0675 , H01S3/067 , H01S3/06754 , H01S3/094007
摘要：【課題】所望の波長の光を出射することができるファイバレーザ装置を提供する。【解決手段】ファイバレーザ装置1は、増幅用光ファイバ10と、増幅用光ファイバ10の活性元素を励起する励起光を出力する励起光源20と、増幅用光ファイバ10の一方側に設けられる第1ミラーと、増幅用光ファイバの他方側に設けられる第2ミラーと、を備え、第1ミラーと第2ミラーとの間の光の損失と増幅用光ファイバ10における光の利得とが等しくなる時において、増幅用光ファイバ10における最も利得が大きくなる波長での利得と第1ミラー及び第2ミラーに反射される光の波長での利得との差が35dB以下であることを特徴とする。【選択図】図1
摘要翻译：要解决的问题：提供一种可以发射所需波长的光的光纤激光器件。解决方案：光纤激光器件1包括用于放大的光纤10，激发光源20，其输出用于激发用于放大的光纤10，设置在用于放大的光纤10的一侧的第一反射镜，以及设置在光纤10的另一侧用于放大的第二反射镜。当第一和第二反射镜之间的光的损失等于用于放大的光纤10中的光的增益时，在最大增益的波长处的用于放大的光纤10中的增益的差异和由第一和第二反射镜反射的光的波长为35dB以下。

5. 发明专利

JP2005221755A Structure and method of connecting optical fiber 审中-公开
标题翻译：连接光纤的结构和方法
公开(公告)号：JP2005221755A
公开(公告)日：2005-08-18
申请号：JP2004029406
申请日：2004-02-05
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G02B6/24 , G02B6/38
CPC分类号： G02B6/3838 , G02B6/3847 , G02B6/4207
摘要： PROBLEM TO BE SOLVED: To provide a connecting structure of an optical fiber realizing optical connection with a simple structure without using a highly accurate positioning component.
SOLUTION: The connecting structure of an optical fiber is such that an optical fiber 3 with a dielectric multilayered film installed on the end face is fixedly stuck to the outgoing end seating 4 and the receiving end seating 6 each of which is provided with a groove for storing the optical fiber, and that the optical fiber 3 on the outgoing end is connected to the optical fiber 5 on the receiving end by bringing the two pieces of seating into contact with each other. The outgoing end seating 4 having a connecting end face 12 in which the tip end of the outgoing end optical fiber 3 and a contact face 22 formed on the receiving end seating 6 are abutted on each other, so that an optical connection is made in a state with a clearance secured between the outgoing end optical fiber 3 exposed on the connecting end face 12 of the outgoing end seating 4 and the receiving end optical fiber 5 exposed on the slope 23 of the receiving end seating 6.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种实现光学连接的光纤的连接结构，其结构简单，而不使用高精度的定位部件。解决方案：光纤的连接结构使得安装在端面上的具有电介质多层膜的光纤3固定地粘附到出口端座4和接收端座6，每个底座设有用于存储光纤的槽，并且出射端的光纤3通过使两个座彼此接触而在接收端连接到光纤5。具有连接端面12的出射端座4，其中出射端光纤3的前端和形成在接收端座6上的接触面22彼此抵接，使得在在出射端座4的连接端面12上露出的出射光纤3和露出在接收端座6的斜面23上的接收端光纤5之间具有间隙的状态。版权所有（ C）2005，JPO＆NCIPI

6. 发明专利

JP2005019540A Optical fiber laser 审中-公开
标题翻译：光纤激光
公开(公告)号：JP2005019540A
公开(公告)日：2005-01-20
申请号：JP2003179850
申请日：2003-06-24
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G02B6/00 , H01S3/06 , H01S3/094
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber laser which hardly stops oscillating even when a part of an excitation light inlet introduces exciting light to the rare earth-loaded optical fiber from an excitation light source therethrough and is partially damaged by burnout. SOLUTION: The optical fiber laser is equipped with resonator mirrors 12 and 13 which are arranged at the end faces of the rare earth ion-loaded optical fiber 11 respectively, and four guide fibers 15 which are extended from an exciting LD module 14 and connected to the side of the rare earth ion-loaded optical fiber 11 at different points. A laser beam emitted from the exciting LD module 14 is introduced into the rare earth ion-loaded fiber 11 through the four points located on its side through the intermediary of the four guide fibers 15. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：即使当激发光入口的一部分从激发光源引入来自稀土负载光纤的激发光并且被烧坏部分损坏时，也提供几乎不停止振荡的光纤激光器。解决方案：光纤激光器分别配置有分别位于稀土离子负载光纤11的端面处的谐振器反射镜12和13以及从激励LD模块14延伸的四个引导光纤15 并且在不同点与稀土离子负载光纤11的一侧连接。从激发的LD模块14发射的激光束通过位于其侧面的四个导体纤维15的介质引入到稀土离子负载光纤11中。（C）2005年，JPO和NCIPI

7. 发明专利

JP2011054913A Fiber laser device 有权
标题翻译：光纤激光器件
公开(公告)号：JP2011054913A
公开(公告)日：2011-03-17
申请号：JP2009205197
申请日：2009-09-04
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO
IPC分类号： H01S3/06 , H01S3/094
CPC分类号： H01S3/06754 , H01S3/06733 , H01S3/094069 , H01S3/09408 , H01S3/09415 , H01S3/10007 , H01S3/1301 , H01S3/1618 , H01S5/0612
摘要： PROBLEM TO BE SOLVED: To provide a fiber laser device capable of performing stable processing and measuring even when a temperature change is caused. SOLUTION: The fiber laser device includes an excitation light source 20 for outputting an excitation light of wavelength λ and a rare earth-added fiber. The wavelength λ is such a wavelength wherein ΔP, Δλp×A'(λ) and ΔA(λ) mutually offset, when a fluctuation rate of strength of the excitation light to temperature is ΔP [dB/°C], a fluctuation rate of wavelength of the excitation light to temperature is Δλp [nm/°C], a fluctuation rate of the amount of absorption of the excitation light per unit wavelength in wavelength λ nm, which is a fluctuation rate of the amount of absorption of the excitation light in the rare earth-added fiber 50 when the wavelength of the excitation light is fluctuated, is A'(λ) [dB/nm], and a fluctuation rate of the amount of absorption of the excitation light per unit temperature in wavelength λ nm, which is a fluctuation rate of absorption of the excitation light in the rare earth-added fiber 50 when the temperature of the rare earth-added fiber 50 is fluctuated, is ΔA(λ) [dB/°C]. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供即使当发生温度变化时也能够进行稳定的处理和测量的光纤激光器件。解决方案：光纤激光器件包括用于输出波长λ的激发光的激发光源20和添加有稀土的光纤。当激发光强度的波动率为ΔP[dB /℃]时，波长λ为波长λP，Δλp×A'（λ）和ΔA（λ）相互偏移的波长，波长λ 激发光的温度的波长为Δλp[nm /℃]，波长λnm的每单位波长的激发光的吸收量的波动率为激发光的吸收量的波动率在激发光的波长波动时的稀土添加纤维50中，为A'（λ）[dB / nm]，波长λnm的每单位温度的激发光的吸收量的变动率是当稀土添加纤维50的温度波动时，稀土添加纤维50中的激发光的吸收波动率为ΔA（λ）[dB /℃]。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2010263188A Fiber output stabilizer 有权
标题翻译：光纤输出稳压器
公开(公告)号：JP2010263188A
公开(公告)日：2010-11-18
申请号：JP2010050414
申请日：2010-03-08
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： MIMURO MASAKUNI , HIMENO KUNIHARU , KITABAYASHI KAZUHIRO
IPC分类号： H01S3/06
CPC分类号： H01S3/067 , H01S3/06754 , H01S3/09408 , H01S3/1301 , H01S3/1312 , H01S3/1618
摘要： PROBLEM TO BE SOLVED: To stabilize a power output from a rare earth doped optical fiber by exactly measuring an increase in loss caused by photodarkening. SOLUTION: A fiber power output stabilizer stabilizes output light from the rare earth doped optical fiber 1, whose core is doped with at least one kind of a rare earth element. The fiber power output stabilizer includes a monitoring light source 2, which emits a monitoring light shorter in wavelength than that of an exciting light that excites the rare earth element; an optical multiplexer 3 which synthesizes monitoring light from the monitoring light source 2 with exciting light; an optical demultiplexer 4 which separates monitoring light having passed through the rare earth doped optical fiber 1 as branch light; and a passed light detector 5, which detects the light intensity of monitoring light from the optical demultiplexer 4. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：通过精确测量由光暗化引起的损耗的增加，来稳定来自稀土掺杂光纤的功率输出。解决方案：光纤功率输出稳定器稳定来自稀土掺杂光纤1的输出光，其掺杂有至少一种稀土元素。光纤功率输出稳定器包括：监测光源2，其发射比激发稀土元素的激发光的波长短的监测光; 光复用器3，其利用激发光合成来自监视光源2的监视光; 将通过稀土掺杂光纤1的监测光分离为分支光的光解复用器4; 以及通过的光检测器5，其检测来自光解复用器4的监视光的光强度。版权所有（C）2011，JPO＆INPIT

9. 发明专利

JP2005303166A Optical fiber end surface structure, optical fiber laser and laser processing unit 审中-公开
标题翻译：光纤端面结构，光纤激光和激光加工单元
公开(公告)号：JP2005303166A
公开(公告)日：2005-10-27
申请号：JP2004120006
申请日：2004-04-15
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G02B6/00 , G02B6/02 , G02B6/26 , G02B6/42 , H01S3/00 , H01S3/06 , H01S3/067 , H01S3/0941 , G02B6/10
CPC分类号： H01S3/06708 , G02B6/262 , H01S3/005 , H01S3/06729 , H01S3/06745 , H01S3/094007 , H01S3/0941 , H01S3/117
摘要： PROBLEM TO BE SOLVED: To provide an end surface structure of low cost which prevents an end surface damage on an optical fiber outputting a high output laser beam. SOLUTION: The optical fiber end surface structure is characterized in that a coreless fiber is connected in a melting state with an outgoing end surface of an optical fiber 21, and there is provided a cladding material 24 having a higher refractive index than that of the coreless fiber 25 around the coreless fiber 25. In this end surface structure, it is desirable that a length of the coreless fiber 25 is set to such a length by which a light outgoing from the optical fiber 21 and propagating inside the coreless fiber 25 may be output from the coreless fiber 25 without reaching once a side surface of the coreless fiber 25. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供低成本的端面结构，其防止在输出高输出激光束的光纤上的端面损伤。光纤端面结构的特征在于，无芯纤维以熔融状态与光纤21的出射端面连接，并且设置了折射率高于其的折射率的包层材料24。无芯纤维25周围。在该端面结构中，希望将无芯纤维25的长度设定为从光纤21射出并在无芯纤维内传播的光的长度 25可以从无芯光纤25输出，而不到达无芯光纤25的侧表面。（C）2006年，JPO和NCIPI

10. 发明专利

JP2007324452A Optical coupler, fiber laser, and optical fiber amplifier 有权
标题翻译：光学耦合器，光纤激光器和光纤放大器
公开(公告)号：JP2007324452A
公开(公告)日：2007-12-13
申请号：JP2006154544
申请日：2006-06-02
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , NAKAI MICHIHIRO , SAKAI TETSUYA
IPC分类号： H01S3/094
摘要： PROBLEM TO BE SOLVED: To provide a fiber laser with rare earth element-doped optical fiber as an oscillation medium, an optical coupler capable of efficiently making exciting light from a plurality of excitation light sources incident to an optical fiber amplifier, fiber laser, and an optical fiber amplifier. SOLUTION: There is provided an optical coupler including a first optical coupler having at least two or more exciting light entrance ports and one exit port, formed by melting/integrating or melting/integrating and further extending an optical fiber of this entrance port, so that the exciting light, made incident to the excitation light entrance port, is emitted from a core of the exit port; and a second optical coupler comprising at least two or more exciting light entrance ports and one exit port, formed by melting/integrating or melting/integrating and further extending the optical fiber of this entrance port, so that the core diameter and the number of openings of this exit port are smaller than that of the core diameter and the number of openings of the entrance port of the first optical coupler; and each exit port of a plurality of second optical couplers is connected to the excitation light entrance port of the first optical coupler. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供具有稀土元素掺杂光纤作为振荡介质的光纤激光器，能够有效地从入射到光纤放大器的多个激发光源产生激发光的光耦合器，光纤激光器和光纤放大器。解决方案：提供了一种光耦合器，包括具有至少两个或更多个激发光入口和一个出口的第一光耦合器，其通过熔融/集成或融合/集成并进一步延伸该入口端口的光纤而形成使得入射到激发光入口的激发光从出口的核心发射; 以及第二光耦合器，包括至少两个或更多个激发光入口和一个出口，其通过熔化/整合或融合/整合并进一步延伸该入口的光纤而形成，使得芯直径和开口数的出口口径小于第一光耦合器的入口的芯径和开口数; 并且多个第二光耦合器的每个出口连接到第一光耦合器的激发光入口。版权所有（C）2008，JPO＆INPIT

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