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11. 发明专利

JP2007165822A Optical pumping device, optical amplifier, fiber laser, and multi-core fiber for optical pumping device 有权
标题翻译：光学泵浦装置，光学放大器，光纤激光器和用于光泵装置的多芯光纤
公开(公告)号：JP2007165822A
公开(公告)日：2007-06-28
申请号：JP2006104056
申请日：2006-04-05
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： TANIGAWA SHOJI , TANAKA HIRONORI , SAITO MANABU , SAKAI TETSUYA , KITABAYASHI KAZUHIRO
IPC分类号： H01S3/06 , G02B6/04 , G02B6/42
CPC分类号： H01S3/09408 , H01S3/06754 , H01S3/094053
摘要： PROBLEM TO BE SOLVED: To provide an optical pumping device for efficiently combining a signal light and an exciting light with an optical pumping double clad fiber. SOLUTION: A multi-core fiber in which a plurality of optical fibers acting as incident ports are banded, and the optical pumping double clad fiber are connected together with a bridge fiber comprising a tapered double clad fiber, in the optical pumping device. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于利用光泵浦双包层光纤有效地组合信号光和激发光的光泵装置。解决方案：在作为入射端口的多个光纤被带状并且光泵浦双包层光纤与包括锥形双包层光纤的桥式光纤连接在一起的多芯光纤中，在光泵装置中。版权所有（C）2007，JPO＆INPIT

12. 发明专利

JP2007114335A Output fall suppressing method for optical fibre for light amplification, optical fiber for light amplification, optical fiber amplifier, and optical fiber laser 有权
标题翻译：用于光放大的光纤的输出阻抗抑制方法，用于光放大的光纤，光纤放大器和光纤激光器
公开(公告)号：JP2007114335A
公开(公告)日：2007-05-10
申请号：JP2005303930
申请日：2005-10-19
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： G02B6/036 , C03B37/10 , H01S3/06
摘要： PROBLEM TO BE SOLVED: To provide an output fall suppression method for an optical fiber for light amplification, with which increase of transmission loss is reduced and a laser output is prevented from falling, to provide a light amplification optical fiber processed by this method for output fall suppression, and also to provide an optical fiber amplifier and an optical fiber laser having such fiber as a light amplification optical fiber. SOLUTION: The output fall suppression method for a light amplification optical fiber (the fiber) in which at least one kind of rare earth element is added to a core is characterized in that the fiber is preliminarily subjected either to a hydrogen adding process in which hydrogen is added to the core by leaving the fiber in an hydrogen atmosphere, or to the light irradiation process in which the core is irradiated with light having a wavelength absorbable by the rare earth ion added to the core of the fiber, with the remaining process subsequently applied thereto and, otherwise, in that both processes are simultaneously applied to the fiber. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：为了提供用于光放大的光纤的输出衰减抑制方法，其中传输损耗的增加减小并且防止激光输出下降，以提供由该处理的光放大光纤用于输出抑制的方法，并且还提供具有诸如光放大光纤的光纤的光纤放大器和光纤激光器。解决方案：将至少一种稀土元素添加到芯中的光放大光纤（光纤）的输出抑制方法的特征在于，纤维预先进行氢添加过程其中通过将纤维留在氢气气氛中将氢添加到芯中，或者通过添加到纤维的芯中的具有可被稀土离子吸收的波长的光照射核的光照射过程，随后对其进行剩余处理，否则，两种方法同时应用于纤维。版权所有（C）2007，JPO＆INPIT

13. 发明专利

JP2007042981A Optical fiber laser, optical fiber amplifier, and mopa-type optical fiber laser 有权
标题翻译：光纤激光器，光纤放大器和MOPA型光纤激光器
公开(公告)号：JP2007042981A
公开(公告)日：2007-02-15
申请号：JP2005227659
申请日：2005-08-05
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： H01S3/06 , H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber laser, an optical fiber amplifier, and an MOPA-type optical fiber laser wherein the generation of amplified return light (ASE) is prevented and their safety and lives are improved. SOLUTION: This optical fiber laser comprises a rare earth added optical fiber which is at least a laser medium, a plurality of pumping light sources for optically pumping the rare earth added optical fiber, and an optocoupler for combining pumping light from respective pumping light sources and making the combined light incident into the rare earth added optical fiber. In this optical fiber laser wherein the pumping light is incident into the rare earth added optical fiber and laser oscillation takes place, the optocoupler is provided with a monitor port through which part of return light from the rare earth added optical fiber toward the pumping light source side propagates, and provided with a pumping light source control means for measuring return light intensity propagating through the monitor port, and preventing the amplification of the return light by reducing outputs of the pumping light sources when the light intensity exceeds a predetermined value. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种光纤激光器，光纤放大器和MOPA型光纤激光器，其中防止放大返回光（ASE）的产生，并且其安全性和寿命得到改善。解决方案：该光纤激光器包括至少为激光介质的稀土添加光纤，用于光学泵浦稀土添加的光纤的多个泵浦光源和用于组合来自相应泵浦的泵浦光的光耦合器光源并使组合的光入射到稀土添加的光纤中。在这种光纤激光器中，其中泵浦光入射到稀土添加的光纤中并发生激光振荡，光耦合器设置有监测端口，通过该监视器端口将来自稀土添加的光纤的一部分返回光朝向泵浦光源并且设置有用于测量通过监视器端口传播的返回光强度的泵浦光源控制装置，并且当光强度超过预定值时，通过减小泵浦光源的输出来防止返回光的放大。版权所有（C）2007，JPO＆INPIT

14. 发明专利

JP2006292674A Method and device for monitoring optical power, and optical device 审中-公开
标题翻译：用于监测光功率的方法和装置以及光学装置
公开(公告)号：JP2006292674A
公开(公告)日：2006-10-26
申请号：JP2005117032
申请日：2005-04-14
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： GA KARAI , KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G01J1/02 , G01J1/42 , H01L31/0232
摘要： PROBLEM TO BE SOLVED: To provide a method for monitoring optical power capable of reducing the number of part items and fused connection points to reduce a loss as the whole system, and also to provide a device therefor and an optical device incorporating the device therein. SOLUTION: In this method for monitoring optical power, an optical fiber for monitoring is arranged in the vicinity of the fused connection point of a measured optical fiber to make scattered light emitted from the fused connection point get incident, and scattered light power is measured through the monitoring optical fiber to monitor the input and output optical powers of the measured optical fiber. This optical power monitoring device of the present invention has the monitoring optical fiber arranged to make the scattered light emitted from the fused connection point get incident, in the vicinity of the fused connection point of the measured optical fiber, and a light detecting means for measuring the scattered light power through the monitoring optical fiber. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于监视能够减少零件数量和熔断连接点的光功率的方法，以减少作为整个系统的损耗，并且还提供一种其设备和包含装置。解决方案：在这种监视光功率的方法中，用于监视的光纤被布置在测量光纤的熔接点附近，使得从熔接的连接点发射的散射光入射，散射光功率通过监控光纤测量，以监测测量光纤的输入和输出光功率。本发明的光功率监视装置具有：监视用光纤，其使从熔融连接点射出的散射光入射到被测光纤的熔接连接点附近;以及光检测装置，散射光功率通过监控光纤。版权所有（C）2007，JPO＆INPIT

15. 发明专利

JP2003069114A Photoamplifier 审中-公开
标题翻译： PHOTOAMPLIFIER
公开(公告)号：JP2003069114A
公开(公告)日：2003-03-07
申请号：JP2001256832
申请日：2001-08-27
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： SEKI TAKESHI , KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： H01S3/06 , H01S3/094
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier which can restrain unnecessary light of a polarized component from being incorporated in output signal light. SOLUTION: Polarizers 3a, 3b are connected to an input side and an output side of an EDF 6 and an excitation light source 5 is connected via a ware- synthesizing coupler 4. In signal light transmitted from an optical transmission path 1, only straight polarized light in either a slow axial direction or a fast axial direction can pass through the first polarizer 3a. Signal light whose straight polarized wave is held is amplified by the EDF 6 and output to the second polarizer 3b in this way. Since only polarized light which passed through the first polarizer 3a passes through in the second polarizer 3b, polarized light in an amplified polarized wave direction alone passes through the second polarizer 3b and is output to the light transmission path 1.
摘要翻译：要解决的问题：提供一种能够抑制偏振分量的不必要光并入输出信号光的光放大器。解决方案：偏振器3a，3b连接到输入侧，EDF 6的输出侧和激发光源5经由器件合成耦合器4连接。在从光传输路径1传输的信号光中，仅仅是直线偏振可以在慢轴向或快轴方向上的光通过第一偏振器3a。保持直线偏振波的信号光通过EDF6放大并以这种方式输出到第二偏振器3b。由于只有通过第1偏振片3a的偏振光通过第2偏振片3b，所以放大的偏振波方向的偏振光单独通过第2偏振片3b，输出到光传输路径1。

16. 发明专利

JP2003031875A Polarization-preserving optical fiber amplifier 审中-公开
标题翻译：偏光保护光纤放大器
公开(公告)号：JP2003031875A
公开(公告)日：2003-01-31
申请号：JP2001214388
申请日：2001-07-13
申请人： Fujikura Ltd , 株式会社フジクラ
发明人： KITABAYASHI KAZUHIRO , SEKI TAKESHI , SAKAI TETSUYA
IPC分类号： H01S3/06 , H01S3/10 , H01S3/23
摘要： PROBLEM TO BE SOLVED: To provide a polarization-preserving optical fiber amplifier that performs optical amplification by holding the polarized wave of signal light, can be improved in gain, and can be reduced in noise. SOLUTION: In this optical fiber amplifier, a polarizer 7 is connected between first and second EDFs 4a and 4b. Amplified spontaneous emission light is emitted from the emitting edge of the first EDF 4a together with amplified signal light and made incident to the polarizer 7. The polarizer 7 is positioned so that the polarizer 7 may only transmit the polarized light component parallel to the signal light and the polarized wave component perpendicular to the signal light of the light made incident to the polarizer 7 is removed. Consequently, the polarized wave component perpendicular to the signal light of the spontaneous emission light is removed and the power of the spontaneous emission light can be reduced by half without damping the intensity of the signal light.
摘要翻译：要解决的问题：为了提供通过保持信号光的偏振波进行光放大的偏振保留光纤放大器，可以提高增益，并且可以降低噪声。解决方案：在该光纤放大器中，偏振器7连接在第一和第二EDF 4a和4b之间。放大的自发发射光与放大的信号光一起从第一EDF 4a的发射边缘发射并入射到偏振器7.偏振器7被定位成使得偏振器7可以仅传输平行于信号光的偏振光分量并且去除垂直于入射到偏振器7的光的信号光的偏振分量。因此，消除了垂直于自发发射光的信号光的偏振分量，并且可以将自发发射光的功率减小一半，而不会阻碍信号光的强度。

17. 发明专利

JP2002076483A OPTICAL FIBER AMPLIFIER 失效
公开(公告)号：JP2002076483A
公开(公告)日：2002-03-15
申请号：JP2000266256
申请日：2000-09-01
申请人： FUJIKURA LTD
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： H01S3/10 , H01S3/06 , H01S3/131
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber amplifier not changing the flatness of gain over a wide wavelength band. SOLUTION: A thulium doped optical fiber 5 is provided between a first erbium-doped optical fiber amplifier 4 and a second erbium-doped optical fiber amplifier 8. A gain fixing control circuit 17 for controlling the gain of the first erbium-doped optical fiber amplifier 4 to be fixed, a gain control circuit 18 for controlling the power of signal light outputted from the second erbium- doped optical fiber amplifier 8 to be fixed and an absorption loss control circuit 19 for monitoring the input signal light 1-1 and the signal light outputted from the thulium-doped optical fiber 5 and changing the absorption characteristics of the light of the thulium-doped optical fiber 5 are provided and this optical fiber amplifier is constituted.

18. 发明专利

JP2006222352A OPTICAL FIBER LASER AND OPTICAL FIBER AMPLIFIER 审中-公开
公开(公告)号：JP2006222352A
公开(公告)日：2006-08-24
申请号：JP2005035908
申请日：2005-02-14
申请人： FUJIKURA LTD
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： H01S3/06
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber laser whose excitation light source is not damaged, and to provide an optical fiber amplifier. SOLUTION: The optical fiber laser has at least a rare earth added optical fiber which is a gain medium, an excitation light source which optically excites the rare earth added optical fiber, and a photocoupler; and carries out laser oscillation by injecting excitation light emitted from the excitation light source to the rare earth added optical fiber via the photocoupler. The optical fiber laser is provided with at least one light shielding means for shielding light injected to the excitation light source from the rare earth added optical fiber via the photocoupler, in a projection end of the excitation light source. COPYRIGHT: (C)2006,JPO&NCIPI

19. 发明专利

JP2008187100A RESIDUAL LIGHT-REMOVAL STRUCTURE, OPTICAL FIBER LASER AND OPTICAL FIBER AMPLIFIER USING THE SAME 审中-公开
公开(公告)号：JP2008187100A
公开(公告)日：2008-08-14
申请号：JP2007020977
申请日：2007-01-31
申请人： FUJIKURA LTD
发明人： KITABAYASHI KAZUHIRO
IPC分类号： H01S3/06 , H01S3/04 , H01S3/067 , H01S3/10 , H04B10/291 , H04B10/40 , H04B10/50 , H04B10/60
摘要： PROBLEM TO BE SOLVED: To provide a residual light-removal structure for removing residual light, other than amplified light, outputted from an outgoing edge side of a rare earth doped optical fiber in an optical amplification system. SOLUTION: A structure is provided on the outgoing edge side of the rare earth doped optical fiber in the optical amplification system using the rare earth doped optical fiber and is provided for removing residual light other than amplified light outputted from the outgoing edge of the rare earth doped optical fiber, wherein residual light-transmitting material is provided around a protective coating of the optical fiber to be connected to the outgoing edge side of the rare earth doped optical fiber, a residual light-absorbing material is provided on an outer periphery of the residual light-transmitting material, and a heat discharge part is thermally in contact with the residual light-absorbing material. COPYRIGHT: (C)2008,JPO&INPIT

20. 发明专利

JP2003092449A OPTICAL FIBER AMPLIFIER 审中-公开
公开(公告)号：JP2003092449A
公开(公告)日：2003-03-28
申请号：JP2001282435
申请日：2001-09-17
申请人： FUJIKURA LTD
发明人： KITABAYASHI KAZUHIRO , SAKAI TETSUYA
IPC分类号： G02F1/01 , H01S3/06 , H01S3/10 , H01S3/13 , H01S3/23
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber amplifier which has a low cost and high reliability with a simple constitution and in which a deterioration of a flatness of a gain due to a gain inclination or a temperature change is suppressed. SOLUTION: The optical fiber amplifier comprises a gain inclination compensator 3 having a loss medium in which wavelength characteristics of an absorption amount and an absorption loss are changed according to an incident light power, and which is connected between two EDFA stages. The compensator 3 has an optical isolator 4, a TDF 5, a WDM coupler 6 and an absorption loss control light source 7. These optical components are, for example, melted to connect by using an optical fiber 1. The inclination of the gain can be compensated by the compensator 3 so that the gain of the amplified light becomes flat in a using wavelength band.

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