公开(公告)号：US08565273B2

公开(公告)日：2013-10-22

申请号：US13586542

申请日：2012-08-15

申请人： Tomoharu Kitabayashi

发明人： Tomoharu Kitabayashi

IPC分类号： H01S3/30

CPC分类号： H01S3/2308 ,  G02B6/02338 ,  G02B6/02357 ,  G02B6/0238 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/09408

摘要： An optical fiber laser including: a master oscillator; and a power amplifier, the power amplifier including: a plurality of excitation light sources; excitation ports each of which is connected to the excitation light sources and which an excitation light emitted from each of the excitation light source enters; a signal port which a laser beam emitted from the master oscillator enters; an optical coupler with an exit port that outputs the excitation lights from the excitation ports together with the laser beam from the signal port; and an optical fiber connected to the exit port, in which the optical fiber is a photonic bandgap fiber, and the optical fiber has a loss wavelength characteristic in that a photonic bandgap region is narrower than a gain wavelength band in a graph with an axis of abscissa representing a wavelength and an axis of ordinate representing a loss amount.

摘要翻译： 一种光纤激光器，包括：主振荡器; 和功率放大器，所述功率放大器包括：多个激发光源; 激励端口各自连接到激发光源，并且从每个激发光源发射的激发光进入; 从主振荡器发射的激光束进入的信号端口; 具有出射端口的光耦合器，其与来自信号端口的激光束一起从激励端口输出激发光; 以及连接到出射口的光纤，其中光纤是光子带隙光纤，并且光纤具有损耗波长特性，因为光子带隙区域比具有轴线的图中的增益波长带窄 表示波长的横坐标和表示损失量的纵坐标轴。

公开(公告)号：US08548013B2

公开(公告)日：2013-10-01

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：US20120307848A1

公开(公告)日：2012-12-06

申请号：US13586542

申请日：2012-08-15

申请人： Tomoharu KITABAYASHI

发明人： Tomoharu KITABAYASHI

IPC分类号： H01S3/067

CPC分类号： H01S3/2308 ,  G02B6/02338 ,  G02B6/02357 ,  G02B6/0238 ,  H01S3/06729 ,  H01S3/06741 ,  H01S3/06754 ,  H01S3/06791 ,  H01S3/09408

摘要： An optical fiber laser including: a master oscillator; and a power amplifier, the power amplifier including: a plurality of excitation light sources; excitation ports each of which is connected to the excitation light sources and which an excitation light emitted from each of the excitation light source enters; a signal port which a laser beam emitted from the master oscillator enters; an optical coupler with an exit port that outputs the excitation lights from the excitation ports together with the laser beam from the signal port; and an optical fiber connected to the exit port, in which the optical fiber is a photonic bandgap fiber, and the optical fiber has a loss wavelength characteristic in that a photonic bandgap region is narrower than a gain wavelength band in a graph with an axis of abscissa representing a wavelength and an axis of ordinate representing a loss amount.

摘要翻译： 一种光纤激光器，包括：主振荡器; 和功率放大器，所述功率放大器包括：多个激发光源; 激励端口各自连接到激发光源，并且从每个激发光源发射的激发光进入; 从主振荡器发射的激光束进入的信号端口; 具有出射端口的光耦合器，其与来自信号端口的激光束一起从激励端口输出激发光; 以及连接到出射口的光纤，其中光纤是光子带隙光纤，并且光纤具有损耗波长特性，因为光子带隙区域比具有轴线的图中的增益波长带窄 表示波长的横坐标和表示损失量的纵坐标轴。

公开(公告)号：US08306073B2

公开(公告)日：2012-11-06

申请号：US13197922

申请日：2011-08-04

申请人： Tomoharu Kitabayashi

发明人： Tomoharu Kitabayashi

IPC分类号： H01S3/30

CPC分类号： H01S3/06754 ,  H01S3/06733 ,  H01S3/094069 ,  H01S3/09408 ,  H01S3/09415 ,  H01S3/10007 ,  H01S3/1301 ,  H01S3/1618 ,  H01S5/0612

摘要： A fiber laser device includes a pumping light source configured to output pumping light having a wavelength λ, and a rare earth-doped fiber, wherein when the intensity change rate of the pumping light with respect to the temperature is denoted by ΔP dB/° C., the wavelength change rate of the pumping light with respect to the temperature is denoted by Δλp nm/° C., the pumping light absorption change rate of the rare earth-doped fiber per unit wavelength change at the wavelength of λ nm when the wavelength of the pumping light changes is denoted by A′(λ) dB/nm, and the pumping light absorption change amount of the rare earth-doped fiber per unit temperature change at the wavelength of λ nm when the temperature of the rare earth-doped fiber changes is denoted by ΔA(λ) dB/° C., the wavelength λ of the pumping light is such a wavelength λ that ΔP, Δλp×A′(λ) and ΔA(λ) compensate with each other.

摘要翻译： 光纤激光器件包括被配置为输出具有波长λ的泵浦光的泵浦光源和稀土掺杂光纤，其中当泵浦光的相对于温度的强度变化率由＆Dgr; P dB / 相对于温度的泵浦光的波长变化率由＆Dgr;λpnm /℃表示，每单位波长的稀土掺杂光纤的泵浦光吸收变化率在波长 当泵浦光的波长改变时，λnm表示为A'（λ）dB / nm，并且当单位温度下的稀土掺杂光纤的泵浦光吸收变化量在λnm的波长处变化时， 稀土掺杂光纤的变化由＆Dgr; A（λ）dB /°C表示，泵浦光的波长λ为＆Dgr; P，＆Dgr;λp×A'（λ）和＆Dgr ; A（λ）相互补偿。

公开(公告)号：US08295314B2

公开(公告)日：2012-10-23

申请号：US12648031

申请日：2009-12-28

申请人： Tomoharu Kitabayashi

发明人： Tomoharu Kitabayashi

IPC分类号： H01S3/30 ,  H01S3/10

CPC分类号： H01S3/06754 ,  H01S3/0078 ,  H01S3/06741 ,  H01S3/06779 ,  H01S3/1618 ,  H01S3/2375 ,  H01S3/302

摘要： An MO-PA fiber laser having a master oscillator; and a first power amplifier which uses as a gain medium, a rare earth-doped optical fiber which is connected to a later stage of the master oscillator, wherein the MO-PA fiber laser has a wavelength conversion portion between the master oscillator and the power amplifier, and has a wavelength filter between the wavelength conversion portion and the master oscillator which only allows wavelength components of pulse light emitted from the master oscillator to pass, thereby making it possible to prevent breakage to a fiber laser which is caused by reflection light without using high-cost optical components.

摘要翻译： 具有主振荡器的MO-PA光纤激光器; 和作为增益介质的第一功率放大器，连接到主振荡器的后级的稀土掺杂光纤，其中MO-PA光纤激光器在主振荡器和功率之间具有波长转换部分 放大器，并且在波长转换部分和主振荡器之间具有仅允许从主振荡器发射的脉冲光的波长分量通过的波长滤波器，从而可以防止由反射光引起的光纤激光器的破坏，而没有 使用高成本的光学元件。

公开(公告)号：US20100135340A1

公开(公告)日：2010-06-03

申请号：US12648031

申请日：2009-12-28

申请人： Tomoharu KITABAYASHI

发明人： Tomoharu KITABAYASHI

IPC分类号： H01S3/30

CPC分类号： H01S3/06754 ,  H01S3/0078 ,  H01S3/06741 ,  H01S3/06779 ,  H01S3/1618 ,  H01S3/2375 ,  H01S3/302

摘要： An MO-PA fiber laser having a master oscillator; and a first power amplifier which uses as a gain medium, a rare earth-doped optical fiber which is connected to a later stage of the master oscillator, wherein the MO-PA fiber laser has a wavelength conversion portion between the master oscillator and the power amplifier, and has a wavelength filter between the wavelength conversion portion and the master oscillator which only allows wavelength components of pulse light emitted from the master oscillator to pass, thereby making it possible to prevent breakage to a fiber laser which is caused by reflection light without using high-cost optical components.

摘要翻译： 具有主振荡器的MO-PA光纤激光器; 和作为增益介质的第一功率放大器，连接到主振荡器的后级的稀土掺杂光纤，其中MO-PA光纤激光器在主振荡器和功率之间具有波长转换部分 放大器，并且在波长转换部分和主振荡器之间具有仅允许从主振荡器发射的脉冲光的波长分量通过的波长滤波器，从而可以防止由反射光引起的光纤激光器的破坏，而没有 使用高成本的光学元件。

公开(公告)号：US07065279B2

公开(公告)日：2006-06-20

申请号：US10853114

申请日：2004-05-26

申请人： Kensuke Shima ,  Tomoharu Kitabayashi ,  Tetsuya Sakai

发明人： Kensuke Shima ,  Tomoharu Kitabayashi ,  Tetsuya Sakai

IPC分类号： G02B6/02

CPC分类号： H01S3/06708 ,  H01S3/094003

摘要： An inner cladding exposure section 14 is formed by removing a part of an outer cladding 4 of an optical amplification medium fiber 10 which has a porous layer 3 between the inner cladding 2 and the outer cladding 4 in a longitudinal direction. An end surface 23 of an optical fiber 20 for the excited light incidence is cemented on an outer periphery of the exposed inner cladding 2. The excited light 24 is incident into the optical amplification medium fiber 10 from the optical fiber 20 for the excited light incidence. By doing this, it is possible to provide a method for exciting a light in an optical amplification medium fiber which can realize a superior amplitude while emitting the excited light so as to be incident into the optical amplification medium fiber highly efficiently.

摘要翻译： 通过在纵向方向上去除在内包层2和外包层4之间具有多孔层3的光学放大介质纤维10的外包层4的一部分来形成内包层曝光部分14。 用于激发的光入射的光纤20的端表面23胶合在暴露的内包层2的外周上。 激发光24从用于激发光入射的光纤20入射到光学放大介质光纤10中。 通过这样做，可以提供一种用于激发光放大介质光纤中的光的方法，其可以在发射激发光的同时实现优异的振幅，从而高效地入射到光放大介质光纤中。

公开(公告)号：US08279899B2

公开(公告)日：2012-10-02

申请号：US12621318

申请日：2009-11-18

申请人： Tomoharu Kitabayashi

发明人： Tomoharu Kitabayashi

IPC分类号： H01S3/30

CPC分类号： H01S3/2308 ,  A61B18/22 ,  H01S3/0064 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/09415 ,  H01S2301/02

摘要： A fiber laser of an MOPA type includes an MO which is a laser oscillator for generating seed light, a PA which is a light amplifier connected to a rear stage of the MO, for amplifying and outputting laser light emitted from the MO, and a reflection device which is provided between the MO and the PA. According to the present invention, the MOPA type fiber laser can decrease the peak value of the pulse which is emitted toward the MO or the pump light source by self-oscillation or reflection, and makes it unlikely that the pump light source or the MO will be damaged.

摘要翻译： MOPA型的光纤激光器包括MO，其是用于产生种子光的激光振荡器，作为连接到MO的后级的光放大器的PA，用于放大并输出从MO发射的激光，以及反射 设置在MO和PA之间。 根据本发明，MOPA型光纤激光器可以通过自振荡或反射来降低朝向MO或泵浦光源发射的脉冲的峰值，并且使泵浦光源或MO不可能 被损坏

公开(公告)号：US20100276822A1

公开(公告)日：2010-11-04

申请号：US12837109

申请日：2010-07-15

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： B29D11/00

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 absorption band which appears around a wavelength of 976 nm in the absorption band by ytterbium contained in the core shows a peak absorption coefficient 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吸收带中出现的波长976nm附近的吸收带表现出峰 吸收系数为800dB / m以下。

公开(公告)号：US20100260212A1

公开(公告)日：2010-10-14

申请号：US12757190

申请日：2010-04-09

申请人： Masakuni Mimuro ,  Kuniharu Himeno ,  Tomoharu Kitabayashi

发明人： Masakuni Mimuro ,  Kuniharu Himeno ,  Tomoharu Kitabayashi

IPC分类号： H01S3/13 ,  H01S3/30

CPC分类号： H01S3/067 ,  H01S3/06754 ,  H01S3/09408 ,  H01S3/1301 ,  H01S3/1312 ,  H01S3/1618

摘要： A fiber output stabilizer according to an aspect of the invention stabilizes output light from a rare-earth doped optical fiber in which at least one kind of a rare-earth element is added to a core. The fiber output stabilizer includes: a monitoring light source that emits monitoring light having a wavelength shorter than that of excitation light exciting the rare-earth element; an optical multiplexer that multiplexes the monitoring light into the excitation light; an optical demultiplexer that demultiplexes the monitoring light passing through the rare-earth doped optical fiber; and a passing light detector that detects light intensity of the monitoring light from the optical demultiplexer.

摘要翻译： 根据本发明的一个方面的光纤输出稳定器稳定了将掺杂有至少一种稀土元素的稀土掺杂光纤的输出光稳定在芯上。 光纤输出稳定器包括：监测光源，其发射波长短于激发稀土元素的激发光的波长的监测光; 一个光复用器，将监控光复用到激发光中; 光分路器，其对通过稀土掺杂光纤的监控光进行解复用; 以及通过光检测器，其检测来自光解复用器的监视光的光强度。