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1. 发明专利

JP2007059479A Optical amplifier 有权
标题翻译：光放大器
公开(公告)号：JP2007059479A
公开(公告)日：2007-03-08
申请号：JP2005240187
申请日：2005-08-22
申请人： Nippon Hoso Kyokai , Sumitomo Electric Ind Ltd , 住友電気工業株式会社 , 日本放送協会
发明人： SANO KOICHI , SHITOMI TATSUHIKO , TSUZAKI TETSUFUMI , KUBO TOSHIHIRO , HONDA MADOKA , MATSUDA TAKAHIRO , SANO WATARU
IPC分类号： H01S3/13 , H01S3/10 , H04B10/07 , H04B10/29 , H04B10/293
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier which can improve the noise factor and reduce the cost. SOLUTION: A light to be amplified is input in an input terminal 11 and is amplified optically in an optical amplification medium 20 and output to an output terminal 12. The level of the light output from the output terminal 12 is detected with an output light monitor 40. A control unit 51 adjusts an excited energy supplied to the optical amplification medium 20 through an excitation section 30 so that the level of the output light obtained by the output light monitor 40 is constant, and performs ALC control. The control unit 51 monitors the level of the light to be input to the input terminal 11 on the basis of the level of the output light obtained by the output light monitor 40. In addition, the control unit 51 compares the output light with a first reference output light level. When it is decided that the level thereof is lower than the first reference output light level, the control unit 51 lowers the maximum supply quantity of excited energy supplied to the optical amplification medium 20 through the excitation section 30, and furthermore, it lowers the output light level still further than the first reference output light level. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供可以改善噪声因素并降低成本的光放大器。解决方案：要放大的光被输入到输入端11中，并在光放大介质20中被光学放大并输出到输出端12.从输出端12输出的光的电平用输出光监视器40.控制单元51通过激励部分30调节提供给光放大介质20的激发能，使得由输出光监视器40获得的输出光的电平恒定，并执行ALC控制。控制单元51基于由输出光监视器40获得的输出光的电平来监视要输入到输入端子11的光的电平。此外，控制单元51将输出光与第一参考输出光电平。当判定其电平低于第一参考输出光电平时，控制单元51降低通过激励部分30提供给光放大介质20的激励能量的最大供给量，此外，其降低输出光级别比第一参考输出光水平还要高。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JP2011077538A Optical amplifier 有权
标题翻译：光放大器
公开(公告)号：JP2011077538A
公开(公告)日：2011-04-14
申请号：JP2010262831
申请日：2010-11-25
申请人： Nippon Hoso Kyokai , Sumitomo Electric Ind Ltd , 住友電気工業株式会社 , 日本放送協会
发明人： SANO KOICHI , SHITOMI TATSUHIKO , TSUZAKI TETSUFUMI , KUBO TOSHIHIRO , HONDA MADOKA , MATSUDA TAKAHIRO , SANO WATARU
IPC分类号： H01S3/10 , H01S3/13 , H04B10/07 , H04B10/29 , H04B10/293
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier capable of improving a noise factor and reducing cost. SOLUTION: Amplification object light, input to an input end 11, is optically amplified in an optical amplification medium 20 to be output from an output end 12. The level of the light output from the output end 12 is detected by an output light monitor part 40. A control part 51 performs ALC control by adjusting excitation energy supplied to the optical amplification medium 20 by an excitation part 30 to make constant the output light level provided by the output light monitor part 40. The control part 51 monitors the level of the light input to the input end 11 based on the output light level provided by the output light monitor part 40. When the output light level is determined to be reduced to below a first reference output light level by comparing the output light level with the first reference output light level, the control part 51 lowers the maximum supply amount of the excitation energy supplied to the optical amplification medium 20 by the excitation part 30 to further reduce the output light level to below the first reference output light level. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供能够改善噪声因子并降低成本的光学放大器。
解决方案：输入到输入端11的放大对象光在光放大介质20中被光放大，以从输出端12输出。从输出端12输出的光的电平由输出端光监视器部分40.控制部分51通过调节由激励部分30提供给光放大介质20的激发能量来使由输出光监视器部分40提供的输出光水平为恒定来执行ALC控制。控制部分51监视基于由输出光监视器部分40提供的输出光水平输入到输入端11的光的电平。当通过将输出光电平与输出光电平进行比较来确定输出光电平被降低到低于第一参考输出光电平第一基准输出光电平，控制部51降低由激励部30向光放大介质20供给的激发能的最大供给量，进一步减少将输出光电平设置为低于第一参考输出光电平。版权所有（C）2011，JPO＆INPIT

3. 发明专利

JP2006128219A Optical amplifier 有权
标题翻译：光放大器
公开(公告)号：JP2006128219A
公开(公告)日：2006-05-18
申请号：JP2004311398
申请日：2004-10-26
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： TSUZAKI TETSUFUMI
IPC分类号： H01S3/10
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier which is easy to be controlled as a plurality of amplifiers are connected in multiple stages. SOLUTION: Input signal optical power is monitored by an optical coupler 11 and a light receiving element 61. Output signal optical power is monitored by an optical coupler 12 and a light receiving element 62. The number of waves of signal light is monitored by a wave number information monitoring part 90. A control unit 81 1 adjusts the power of excited light outputted from an excitation light source 71 and an excitation light source 72 based on the result of input signal light power monitoring, the result of output signal light power monitoring, and the result of wave number information monitoring, to control the entire gain of an optical amplifier 1 to be constant. A control unit 82 1 adjusts the loss of signal light in a variable optical attenuator 40 based on the result of input signal optical power monitoring and the result of wave number information monitoring, to control the output signal optical power to be constant. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种由多个放大器以多级连接而容易控制的光放大器。
解决方案：输入信号光功率由光耦合器11和光接收元件61监测。输出信号光功率由光耦合器12和光接收元件62监视。监视信号光的波数通过波数信息监视部分90.控制单元81 1 根据输入信号光功率监视的结果调节从激发光源71和激发光源72输出的激发光的功率，输出信号光功率监视的结果以及波数信息监视的结果，以控制光放大器1的整体增益恒定。基于输入信号光功率监视的结果和波数信息监视的结果，控制单元82 <1> 调整可变光衰减器40中的信号光损耗，以控制输出信号光功率要恒定版权所有（C）2006，JPO＆NCIPI

4. 发明专利

JP2004297101A Optical fiber amplifier 有权
公开(公告)号：JP2004297101A
公开(公告)日：2004-10-21
申请号：JP2004216382
申请日：2004-07-23
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： KADOI MOTOTAKA , TSUZAKI TETSUFUMI
IPC分类号： H01S3/10 , H01S3/07
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber amplifier capable of executing constant gain control even when neither lateral spontaneous emission light from amplifying optical fiber nor residual excitation light can be detected. SOLUTION: An optical connector 111, a monitoring coupler 121, an optical isolator 131, a WDM coupler 141, EDFs 151-153, a WDM coupler 142, an optical isolator 132, a monitoring coupler 122, and an optical connector 112 are connected in series from input end to output end of signal light in this order. A control circuit 170 controls the intensity of stimulating light supplied to the EDFs 151-153 from forward direction through the WDM coupler 141 to be kept unchanged, and the intensity of the excitation light supplied to the EDFs 151-153 from backward direction through the WDM coupler 142 in such a manner that a gain determined by the ratio between the intensity of input signal light and that of output one which is detected by photodiodes 161, 162 is kept unchanged. COPYRIGHT: (C)2005,JPO&NCIPI

5. 发明专利

JP2004198523A Optical fiber module 审中-公开
公开(公告)号：JP2004198523A
公开(公告)日：2004-07-15
申请号：JP2002364118
申请日：2002-12-16
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： FUKUDA KEIICHIRO , HIRANO MASAAKI , KADOI MOTOTAKA , TSUZAKI TETSUFUMI , TAMANO KENJI
IPC分类号： G02F1/35
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber module suitably used in a lumped constant type Raman amplifier. SOLUTION: In the optical fiber module 100, a minimum bending diameter D 1 of an optical fiber 110 for Raman amplification is set to be ϕ140 mm or smaller and more suitably ϕ60 mm or smaller. Because the minimum bending diameter D 1 is made small in a starting portion of winding of the optical fiber 110 for Raman amplification, an effective cutoff wavelength is shortened. Out of pumped light reaching the starting portion of winding of the optical fiber 110 for Raman amplification from a pigtail optical fiber 120, higher order mode propagation light is cut off at the starting portion of winding and only ground mode light passes through the starting portion of winding and is made incident on the optical fiber 110 for Raman amplification. COPYRIGHT: (C)2004,JPO&NCIPI

6. 发明专利

JP2010199213A Optical amplifier 审中-公开
标题翻译：光放大器
公开(公告)号：JP2010199213A
公开(公告)日：2010-09-09
申请号：JP2009040867
申请日：2009-02-24
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： TSUZAKI TETSUFUMI , YUSA HIDEAKI
IPC分类号： H01S3/10 , H01S3/06
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier which can realize rapid output control. SOLUTION: This optical amplifier includes a first photoelectrically converting device 21 which inputs a branched light S m1 , converts into a current, according to the intensity of the branched light S m1 to generate a first optical detection signal S g1 and outputs the first optical detection signal S g1 ; a first current-voltage converting circuit 25, which converts the first optical detection signal S g1 between a current and a voltage to create a second optical detection signal S g2 and outputs the second optical detection signal S g2 ; and a first ASE correcting part 31, which inputs the second optical detection signal S g2 , carries out an analog correction based on a natural release amplified light generating in an optical fiber 6, creates a third optical detection signal S g3 , and outputs the third optical detection signal S g3 . COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种可实现快速输出控制的光放大器。解决方案：该光放大器包括：第一光电转换装置21，其输入分支光S m1 ，根据分支光S m1 的强度转换成电流， SB>以产生第一光学检测信号S g1 ，并输出第一光学检测信号S g1 ; 第一电流电压转换电路25，其在电流和电压之间转换第一光学检测信号S g1 ，以产生第二光学检测信号S g2 ，并输出第二光学检测信号S g2 ; 并且输入第二光学检测信号S g2 的第一ASE校正部分31基于在光纤6中产生的自然释放放大光进行模拟校正，产生第三光学检测信号并且输出第三光学检测信号S g3 。版权所有（C）2010，JPO＆INPIT

7. 发明专利

JP2007318013A Optical amplifier, and optical transmission system 审中-公开
标题翻译：光放大器和光传输系统
公开(公告)号：JP2007318013A
公开(公告)日：2007-12-06
申请号：JP2006148382
申请日：2006-05-29
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： TSUZAKI TETSUFUMI
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H04B10/03 , H04B10/032 , H04B10/079 , H04B10/29 , H04B10/293
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier capable of suppressing deterioration of excitation efficiency. SOLUTION: A fiber 11 for optical amplification optically amplifies a signal light inputted into an incident end 10a, and outputs the optically amplified signal light from an output end 10b. Excitation light sources 12, 13 each output an excitation light having a wavelength enough to excite the fiber 11 for optical amplification. A control unit 16 monitors power of an excitation light to be outputted from the usual excitation light source 12. If the excitation light power is not less than a predetermined value, the control unit 16 causes the usual excitation light source 12 to operate and a standby excitation light source 13 to stop. Further, if the excitation light power to be outputted from the usual excitation light source 12 is less than the predetermined value, the control unit 16 causes the standby excitation light source 13 to operate. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：提供能够抑制激励效率的劣化的光放大器。解决方案：用于光放大的光纤11光输入入射端10a的信号光，并输出来自输出端10b的光放大信号光。激励光源12,13各自输出具有足以激发用于光放大的光纤11的波长的激发光。控制单元16监视从通常的激发光源12输出的激发光的功率。如果激发光功率不小于预定值，则控制单元16使通常的激发光源12工作并且待机激发光源13停止。此外，如果要从通常的激发光源12输出的激发光功率小于预定值，则控制单元16使待机激励光源13工作。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2007074511A Optical amplifier and optical communication system 审中-公开
标题翻译：光放大器和光通信系统
公开(公告)号：JP2007074511A
公开(公告)日：2007-03-22
申请号：JP2005260655
申请日：2005-09-08
申请人： Kddi Corp , Kddi株式会社 , Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： TSUZAKI TETSUFUMI , SHITOMI TATSUHIKO , HATA YOICHI , TSURITANI TAKEHIRO
IPC分类号： H04B10/07 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/293 , H04B17/00
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier by which transmission quality of signal light on an optical transmission path is easily monitored or managed.
SOLUTION: Output light level information obtained by an output light level monitoring part 30 is transmitted from an output end 1d to a rear stage optical amplifier provided at a rear stage of itself by a transmitting part 50. Output light level information of a front stage optical amplifier transmitted from a front stage optical amplifier provided at a front stage of itself and reaching an input end 1c is received by a receiving part 60. Span loss of the optical transmission path from the front stage optical amplifier to itself is calculated based the output light level information of the front stage optical amplifier received by the receiving part 60 and an input light level obtained by an input light level monitoring part 20 by an operation part 70. A gain adjustment part 80 adjusts a gain based on the span loss calculated by the operation part 70 by a gain adjustment part 80.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：解决的问题：提供一种光学放大器，通过该放大器容易地监视或管理光传输路径上的信号光的传输质量。解决方案：由输出光电平监视部分30获得的输出光电平信息从输出端1d发送到设置在其自身的后级的后级光放大器，由发射部分50输出。从设置在其前端并到达输入端1c的前级光放大器传输的前级光放大器由接收部分60接收。基于前级光放大器到其自身的光传输路径的跨度损耗基于由接收部分60接收的前级光放大器的输出光级信息和由操作部分70由输入光电平监视部分20获得的输入光级。增益调整部分80根据跨度损耗来调整增益通过增益调整部分80由操作部分70计算。版权所有：（C）2007，JPO＆INPIT

9. 发明专利

JP2006067364A Analog optical transmission system 审中-公开
标题翻译：模拟光传输系统
公开(公告)号：JP2006067364A
公开(公告)日：2006-03-09
申请号：JP2004248977
申请日：2004-08-27
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： MIYAMOTO TOSHIYUKI , TSUZAKI TETSUFUMI , SHITOMI TATSUHIKO
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/2519 , H04B10/2525 , H04B10/54 , H04B10/58
CPC分类号： H04B10/25253
摘要： PROBLEM TO BE SOLVED: To provide an analog optical transmission system equipped with a structure for expanding a distance for which analog transmission can be performed.
SOLUTION: The analog optical transmission system has an optical transmitter (10) for sending an optical signal modulated on the basis of an electrical signal multiplexed on a frequency axis, a transmission path (30) including a 20 km or less full length SMF, and an optical receiver (20). A distribution compensation fiber (400) for compensating wavelength distribution of the transmission path (30) is arranged on the transmission path (30). The distribution compensation fiber (400) has a -250 ps/nm/km or shorter wavelength distribution and a 1.2 km or shorter, or a -330 ps/nm/km or shorter wavelength distribution and a 1.1 km or shorter. Optical suppression devices (410a, 410b) for reducing MPI noise are arranged on ends of the distribution compensation fiber (400).
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种配备有用于扩展可以进行模拟传输的距离的结构的模拟光传输系统。解决方案：模拟光传输系统具有用于发送基于在频率轴上多路复用的电信号调制的光信号的光发射机（10），包括20km或更小全长的传输路径（30） SMF和光接收器（20）。用于补偿传输路径（30）的波长分布的分布补偿光纤（400）布置在传输路径（30）上。分布补偿光纤（400）具有-250ps / nm / km或更短的波长分布和1.2km或更短或-330ps / nm / km或更短的波长分布和1.1km或更短的波长分布。用于降低MPI噪声的光抑制装置（410a，410b）布置在分配补偿光纤400的端部。版权所有（C）2006，JPO＆NCIPI

10. 发明专利

JP2004139047A Optical fiber product and method for manufacturing the same, raman amplifier and method for manufacturing the same, method for manufacturing optical coupler, and optical transmission line 审中-公开
公开(公告)号：JP2004139047A
公开(公告)日：2004-05-13
申请号：JP2003320238
申请日：2003-09-11
申请人： Sumitomo Electric Ind Ltd , 住友電気工業株式会社
发明人： TSUZAKI TETSUFUMI , ISHIKAWA SHINJI
IPC分类号： G02B6/255 , G02B6/02 , G02B6/10 , G02F1/35 , H01S3/06 , H01S3/30
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing or the like of an optical fiber product with which an increase in loss in the vicinity of 1.38 μm wavelength due to absorption of an OH group is effectively suppressed. SOLUTION: Two lines of optical fibers (4, 2) of which the mode field diameters are different from each other are prepared. Before or after melting connection of the optical fibers (4, 2), the vicinity of at least a connection end face of the fiber with the smaller mode field diameter is heated with a heat source (12) using no fuel containing pure hydrogen as a constituent element. Thereby the absorption of the OH group within the heated region is reduced. Consequently the increase of transmission loss at 1.38μm wavelength is suppressed to be 0.1 dB or lower. COPYRIGHT: (C)2004,JPO

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