公开(公告)号：US20120163402A1

公开(公告)日：2012-06-28

申请号：US13345133

申请日：2012-01-06

申请人： Yasuhiro OBA ,  Michihiro NAKAI

发明人： Yasuhiro OBA ,  Michihiro NAKAI

IPC分类号： H01S3/067

CPC分类号： H01S3/06754 ,  H01S3/0078 ,  H01S3/0092 ,  H01S3/10092 ,  H01S3/1022 ,  H01S3/302

摘要： The invention relates to a fiber laser device 100. In the preliminary pumping state, the laser light is not output from the seed laser light source 10, the pumping light is output from the pumping light source 10, and the pumping light has such an intensity that the wavelength of the laser light emitted and output from the amplification optical fiber 30 is not converted by the wavelength converter 71. In the output state, the laser light is output from the seed laser light source 10, the pumping light is output from the pumping light source 20, and the laser light and the pumping light have such intensities that the wavelength of the laser light amplified and output by the amplification optical fiber 30 is converted by the wavelength converter 71.

摘要翻译： 本发明涉及一种光纤激光装置100.在初步泵送状态下，激光不从种子激光光源10输出，泵浦光从泵浦光源10输出，泵浦光具有这样的强度 从放大光纤30发射和输出的激光的波长不被波长转换器71转换。在输出状态下，激光从种子激光光源10输出，泵浦光从 泵浦光源20，激光和泵浦光具有由放大光纤30放大和输出的激光的波长由波长转换器71转换的强度。

公开(公告)号：US20130057949A1

公开(公告)日：2013-03-07

申请号：US13605535

申请日：2012-09-06

申请人： Michihiro NAKAI ,  Yasuhiro OBA

发明人： Michihiro NAKAI ,  Yasuhiro OBA

IPC分类号： H01S5/04

CPC分类号： H01S3/06754 ,  H01S3/094011 ,  H01S3/09415 ,  H01S3/1024 ,  H01S5/06825

摘要： A high-power pulse light generator includes: a master oscillator generating oscillated pulse light in synchronization with a master clock signal; an optical amplifier amplifying the oscillated pulse light output from the master oscillator and outputting high-power pulsed light; a driving unit driving a pumping semiconductor laser in synchronization with the master clock signal; and a control unit controlling the driving unit so that the driving current to be supplied to the pumping semiconductor laser becomes lower than or equal to a set value at which the pumping semiconductor laser is not in a laser oscillation state when returning light from an irradiated body with the high-power pulsed light reaches the pumping semiconductor laser connected to the optical amplifier, the control unit determining a timing of the control in accordance with an optical path length between the irradiated body and the pumping semiconductor laser.

摘要翻译： 大功率脉冲光发生器包括：主振荡器，与主时钟信号同步产生振荡的脉冲光; 放大从主振荡器输出的振荡脉冲光并输出大功率脉冲光的光放大器; 驱动单元，与主时钟信号同步地驱动泵浦半导体激光器; 以及控制单元，其控制所述驱动单元，使得提供给所述泵浦半导体激光器的驱动电流变为低于或等于当从被照射体返回光时所述泵浦半导体激光器不处于激光振荡状态的设定值 利用高功率脉冲光到达连接到光放大器的泵浦半导体激光器，控制单元根据照射体与泵浦半导体激光器之间的光程长度确定控制的定时。

公开(公告)号：US20090175575A1

公开(公告)日：2009-07-09

申请号：US12273744

申请日：2008-11-19

申请人： Michihiro NAKAI

发明人： Michihiro NAKAI

IPC分类号： G02B6/26

CPC分类号： G02B6/2835

摘要： A multi-mode optical coupler which includes an integrated section in which two optical fibers are fused and integrated together, at least one of these optical fibers being a multi-mode fiber, the multi-mode optical coupler coupling multi-mode light carried in the one of the multi-mode fibers to the other of the optical fibers, wherein: assuming that an outline of the integrated section in a plane view of the optical coupler is a function of a position along the longitudinal direction of the fibers, the multi-mode optical coupler has a plurality of inflection points along the outline; the multi-mode optical coupler satisfies: in an area between the farthermost inflection points includes: the length of the area between the inflection points is not more than 2 mm and an outer diameter h2 of the optical fibers along the direction in which the optical fibers are arranged in parallel is in the range of 70% to 80% of a sum of the outer diameters of the optical fibers; or the length of the area between the inflection points is not less than 1 mm and not more than 2 mm and the outer diameter h2 is in the ranges of 50% to 70% and 80% to 90% of the sum of the outer diameters of the optical fibers.

摘要翻译： 一种多模光耦合器，其包括集成部分，其中两个光纤熔合并集成在一起，这些光纤中的至少一个是多模光纤，多模光耦合器耦合多模光 光纤中另一个的多模光纤之一，其中：假设光耦合器的平面图中的集成部分的轮廓是沿着光纤的纵向方向的位置的函数， 模式光耦合器沿着轮廓具有多个拐点; 多模光耦合器满足：在最远的拐点之间的区域包括：拐点之间的区域的长度不大于2mm，光纤的沿着光纤的方向的外径h2 平行布置在光纤的外径之和的70％至80％的范围内; 或拐点之间的区域的长度不小于1mm且不大于2mm，外径h2在外径之和的50％至70％的范围内，80％至90％ 的光纤。

公开(公告)号：US20100067860A1

公开(公告)日：2010-03-18

申请号：US12604913

申请日：2009-10-23

申请人： Masashi IKEDA ,  Naritoshi YAMADA ,  Kuniharu HIMENO ,  Michihiro NAKAI ,  Tomoharu KITABAYASHI

发明人： Masashi IKEDA ,  Naritoshi YAMADA ,  Kuniharu HIMENO ,  Michihiro NAKAI ,  Tomoharu KITABAYASHI

IPC分类号： G02B6/02 ,  G02B6/00

CPC分类号： G02B6/03688 ,  G02B6/02033 ,  G02B6/03633 ,  H01S3/06716 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/0675 ,  H01S3/094007 ,  H01S3/1618 ,  H01S3/1693 ,  H01S3/176

摘要： A rare earth-doped core optical fiber includes a core comprising a silica glass containing at least aluminum and ytterbium, a clad provided around the core and comprising a silica glass having a lower refraction index than that of the core, and a polymer layer provided on the outer circumference of the clad and having a lower refractive index than that of the clad, wherein aluminum and ytterbium are doped into the core such that a loss increase by photodarkening, TPD, satisfies the following inequality (A). By this rare earth-doped core optical fiber, it is possible to manufacture an optical fiber laser capable of maintaining a sufficient laser oscillation output even when used for a long period of time. TPD≧10{−0.655*(DAl)−4.304*exp{−0.00343*(AYb)}+1.274}  (A)

摘要翻译： 掺杂稀土的芯光纤包括包含至少包含铝和镱的二氧化硅玻璃的芯体，围绕芯部设置的包层，其包含比芯的折射率低的石英玻璃，以及设置在 包层的外周，折射率低于包层的折射率，其中铝和镱被掺杂到芯中，使得通过光暗化TPD的损耗增加满足以下不等式（A）。 通过这种稀土掺杂的芯光纤，即使长时间使用，也可以制造能够保持足够的激光振荡输出的光纤激光器。 TPD≥10{-0.655 *（DA1）-4.304 * exp {-0.00343 *（AYb）} + 1.274}（A）

公开(公告)号：US20090274175A1

公开(公告)日：2009-11-05

申请号：US12496200

申请日：2009-07-01

申请人： Tomoharu KITABAYASHI ,  Tetsuya SAKAI ,  Michihiro NAKAI

发明人： Tomoharu KITABAYASHI ,  Tetsuya SAKAI ,  Michihiro NAKAI

IPC分类号： H01S3/30

CPC分类号： H01S3/2333 ,  H01S3/0064 ,  H01S3/06758 ,  H01S3/2375 ,  H01S3/302

摘要： This fiber laser is provided with: a signal light source that outputs a signal light; a rare earth-doped fiber that amplifies and outputs the signal light from the signal light source; a Raman amplifying fiber that is routed as a portion of an optical transmission path in order to output the output light from the rare earth-doped fiber to an outside thereof; and a wavelength selecting element that is provided in the optical transmission path from the Raman amplifying fiber to the signal light source and does not allow transmission of a Stokes light that is generated in the Raman amplifying fiber.

摘要翻译： 该光纤激光器具有：输出信号光的信号光源; 稀土掺杂光纤，其放大并输出来自信号光源的信号光; 拉曼放大光纤，其被路由为光传输路径的一部分，以便将来自稀土掺杂光纤的输出光输出到其外部; 以及波长选择元件，其设置在从拉曼放大光纤到信号光源的光传输路径中，并且不允许透射在拉曼放大光纤中产生的斯托克斯光。

公开(公告)号：US20070280597A1

公开(公告)日：2007-12-06

申请号：US11755681

申请日：2007-05-30

申请人： Michihiro NAKAI ,  Tetsuya SAKAI

发明人： Michihiro NAKAI ,  Tetsuya SAKAI

IPC分类号： G02B6/26

CPC分类号： G02B6/2835 ,  H01S3/06729 ,  H01S3/094007 ,  H01S3/094015 ,  H01S3/094053 ,  H01S3/09415

摘要： A multi-port coupler for coupling an pumping light source to a cladding pump fiber for optical amplification, includes a central signal fiber and a plurality of pumping fibers arranged around the central signal fiber, the central signal fiber and the plurality of pumping fibers being unified and a front side is reduced in diameter, wherein an emitted light confining waveguide part is provided around a core of the signal fiber located at the center, and the emitted light confining waveguide part whose outer diameter is larger than that of the core has a higher refractive index than a cladding and a lower refractive index than the core and the emitted light confining waveguide part is formed continuously from a splicing point of the cladding pump fiber to a coupler front end branched into multiple fibers.

摘要翻译： 用于将泵浦光源耦合到用于光放大的包层泵浦光纤的多端口耦合器包括中心信号光纤和围绕中心信号光纤布置的多个泵浦光纤，中心信号光纤和多个泵浦光纤被统一 并且前侧的直径减小，其中发射的光限制波导部分设置在位于中心的信号光纤的芯周围，并且外径大于芯的发射光限制波导部分具有较高的 从包层泵浦纤维的拼接点到分支成多个纤维的耦合器前端连续地形成比包层折射率低且折射率低于芯部和发射的光限制波导部分的折射率。

公开(公告)号：US20100284429A1

公开(公告)日：2010-11-11

申请号：US12841730

申请日：2010-07-22

申请人： Michihiro NAKAI

发明人： Michihiro NAKAI

IPC分类号： H01S3/117

CPC分类号： H01S3/0675 ,  G02B6/29319 ,  H01S3/06708 ,  H01S3/09408 ,  H01S3/117

摘要： A pulsed light generator of the invention includes: an excitation light source; a fiber grating into which excitation light from the excitation light source enters; a rare-earth doped optical fiber optically coupled with the fiber grating, in which a rare-earth element is doped into a core, serving as an optical transmitting section; an optical switch including a deflection element for causing a Q-switching operation; a first optical fiber that causes light from the rare-earth doped optical fiber to enter into the optical switch; and a second optical fiber for waveguiding pulsed light output from the optical switch. One surface side of the optical switch, into which light enters, is subjected to anti-reflection treatment with a reflectance with respect to a wavelength of the pulsed light output from the optical switch being 0.1% or less. A low-reflection section having a reflectance with respect to the wavelength of the pulsed light output from the optical switch of from 1% to 60% inclusive, is arranged on an other surface side of the optical switch, from which light is emitted.

摘要翻译： 本发明的脉冲光发生器包括：激发光源; 来自激发光源的激发光进入的光纤光栅; 与光纤光栅光耦合的稀土掺杂光纤，其中将稀土元素掺杂到芯中，用作光发射部分; 光开关，其包括用于进行Q切换操作的偏转元件; 使来自稀土掺杂光纤的光进入光开关的第一光纤; 以及用于波导从光开关输出的脉冲光的第二光纤。 进入光开关的一个表面侧，相对于从光开关输出的脉冲光的波长为0.1％以下，以反射率进行防反射处理。 相对于从光开关输出的脉冲光的波长的反射率为1％至60％的低反射部分布置在光开关的另一个表面侧，从该光开关发射光。

公开(公告)号：US20090317042A1

公开(公告)日：2009-12-24

申请号：US12109612

申请日：2008-04-25

申请人： Masashi IKEDA ,  Naritoshi YAMADA ,  Kuniharu HIMENO ,  Michihiro NAKAI ,  Tomoharu KITABAYASHI

发明人： Masashi IKEDA ,  Naritoshi YAMADA ,  Kuniharu HIMENO ,  Michihiro NAKAI ,  Tomoharu KITABAYASHI

IPC分类号： G02B6/036 ,  G02B6/00 ,  B05D5/06

CPC分类号： H01S3/06716 ,  C03B37/01838 ,  C03B37/01853 ,  C03B2201/12 ,  C03B2201/31 ,  C03B2201/36 ,  C03B2203/23 ,  C03C13/045 ,  C03C13/046 ,  G02B6/03633 ,  G02B6/03638

摘要： A rare earth-doped core optical fiber of the present invention includes a core comprising a silica glass containing at least aluminum and ytterbium, and a clad provided around the core and comprising a silica glass having a lower refraction index than that of the core, wherein the core has an aluminum concentration of 2% by mass or more, and ytterbium is doped into the core at such a concentration that the light absorption band which appears around a wavelength of 976 nm in the light absorption band by ytterbium contained in the core shows a peak light absorption rate of 800 dB/m or less.

摘要翻译： 本发明的稀土掺杂的芯光纤包括包含至少含有铝和镱的二氧化硅玻璃的芯和在芯周围设置的包层，其包含比芯的折射率低的石英玻璃，其中 芯的铝浓度为2质量％以上，并且以这样的浓度将镱掺杂到芯中，使得在芯中包含的镱的光吸收带中出现的波长976nm附近的光吸收带显示 峰值光吸收率为800dB / m以下。

公开(公告)号：US20080175287A1

公开(公告)日：2008-07-24

申请号：US12017748

申请日：2008-01-22

申请人： Michihiro NAKAI

发明人： Michihiro NAKAI

IPC分类号： H01S3/13

CPC分类号： H01S3/1301 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/11 ,  H01S3/2308

摘要： A method of controlling a pulse output in a master oscillator-power amplifier type fiber pulse laser apparatus comprising a master oscillator unit and a power amplifier unit connected to the master oscillator unit, includes starting the master oscillator unit before starting the power amplifier unit.

摘要翻译： 一种控制主振荡器功率放大器型光纤脉冲激光装置中的脉冲输出的方法，包括主振荡器单元和连接到主振荡器单元的功率放大器单元，包括在启动功率放大器单元之前启动主振荡器单元。