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11. 发明专利

JP2000196169A OPTICALLY AMPLIFYING DEVICE 失效
公开(公告)号：JP2000196169A
公开(公告)日：2000-07-14
申请号：JP2000033016
申请日：2000-02-10
申请人： FUJITSU LTD
发明人： SUGAYA YASUSHI , KINOSHITA SUSUMU
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H04B10/07 , H04B10/2525 , H04B10/2543 , H04B10/29 , H04B10/293 , H04B10/296 , H04B10/54 , H04B10/564 , H04B10/572 , H04B10/58 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide an optically amplifying device used for a wavelength division multiplex optical transmission system which multiplexes and transmits optical signals of various wavelengths, where the optical amplifying device can be restrained from deteriorating in nonlinear characteristics and an S/N ratio due to a change in number of channels. SOLUTION: An optically amplifying device is equipped with a first part 1000 which comprises a rare earth doped optical fiber 521, an exciting laser diode(LD) 591, and an automatic optical gain control circuit (AGC) 601, a second part 2000 which comprises an optical attenuator (ATT) 64 and an automatic level control circuit (ALC) 66, and a monitor signal processing circuit 70. The optically amplifying device is so controlled to amplify and output wavelength division multiplex optical signals at a level corresponding to the number of channels before channels are changed in number, and when a change in number of channels is noticed, the optical attenuator 64 is temporarily kept constant in light transmittivity, and the optical amplifying device is so controlled as to keep its gain constant and output light signal at a level corresponding to the number of channels. When the change in the number of channels is finished, the optically amplifying device is so controlled as to keep its gain constant at a level corresponding to the number of channels starting to control the light transmittivity of the optical attenuator 64.

12. 发明专利

JP2013172375A Optical receiver 有权
标题翻译：光接收机
公开(公告)号：JP2013172375A
公开(公告)日：2013-09-02
申请号：JP2012036003
申请日：2012-02-22
申请人： Fujitsu Telecom Networks Ltd , 富士通テレコムネットワークス株式会社 , Fujitsu Ltd , 富士通株式会社
发明人： HONDA TOSHIKI , FUJITA TAKEHIRO , SUGAYA YASUSHI
IPC分类号： H04B10/40 , H04B10/50 , H04B10/60 , H04J14/00 , H04J14/02
CPC分类号： H04B10/60 , H04B10/695
摘要： PROBLEM TO BE SOLVED: To suitably adjust the RXDTV of an optical receiving unit receiving each optical signal, in an optical receiver receiving a wavelength multiplex optical signal.SOLUTION: An optical receiver 11 includes an optical amplifier 16 for amplifying a wavelength multiplex optical signal, a demultiplexer 17 for demultiplexing an amplified wavelength multiplex optical signal into optical signals of a plurality of wavelengths, an optical receiving unit 18 for identifying and reproducing each demultiplexed optical signal, an error correction unit 20 for performing code error correction of each optical signal subjected to identification and reproduction, and a main control unit 22. When adjusting the RXDTV of an optical receiving unit receiving an optical signal of a certain wavelength, the main control unit 22 lowers the gain of the optical amplifier 16 when compared with that during normal operation, within such a range that the code error generation state of an optical signal having another wavelength does not exceed the correction capability of the error correction unit 20, and adjusts the RXDTV to an optimum value under that state.
摘要翻译：要解决的问题：在接收波长复用光信号的光接收机中适当调整接收各光信号的光接收单元的RXDTV。解决方案：光接收机11包括用于放大波长复用光信号的光放大器16，用于将放大的波长复用光信号解复用为多个波长的光信号的解复用器17，用于识别和再现每个解复用的光信号的光接收单元18，用于对经过...的每个光信号执行码纠错的纠错单元20 识别和再现以及主控制单元22.当调整接收到一定波长的光信号的光接收单元的RXDTV时，与正常操作相比，主控制单元22降低光放大器16的增益，在光学信号的代码错误发生状态的范围内 l具有不超过纠错单元20的校正能力的另一波长，并且在该状态下将RXDTV调整到最佳值。

13. 发明专利

JP2009055058A Optical amplifier, and optical amplification method and system 审中-公开
标题翻译：光放大器和光放大方法及系统
公开(公告)号：JP2009055058A
公开(公告)日：2009-03-12
申请号：JP2008275216
申请日：2008-10-27
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ONAKA YOSHINORI , TANAKA TOMOTO , HAYASHI ETSUKO , SUGAYA YASUSHI , KINOSHITA SUSUMU
IPC分类号： H01S3/10 , G02F1/35 , H01S3/06 , H01S3/23 , H01S5/14
摘要： PROBLEM TO BE SOLVED: To provide a system configuration for broadening the band of an optical amplifier for increasing a wavelength multiplex number and constituting a broad transmission signal band. SOLUTION: The plurality of optical amplifiers of different optical amplification gain band widths are combined, and blocking is executed using a plurality of excitation light sources so as to configure a Raman amplifier covering the plurality of optical amplification gain bands. Thus, the band of the optical amplifier is broadened. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于拓宽光放大器的频带以增加波长多路复用数并构成宽的发送信号频带的系统配置。解决方案：组合具有不同光放大增益带宽的多个光放大器，并且使用多个激发光源执行阻挡，以便配置覆盖多个光放大增益带的拉曼放大器。因此，光放大器的频带变宽。版权所有（C）2009，JPO＆INPIT

14. 发明专利

JP2009044327A Wavelength division multiplex signal monitoring device and wavelength division multiplex transmission apparatus possessing the same 有权
标题翻译：波长段多路信号监测装置和波长段多路传输装置
公开(公告)号：JP2009044327A
公开(公告)日：2009-02-26
申请号：JP2007205607
申请日：2007-08-07
申请人： Fujitsu Ltd , 富士通株式会社
发明人： KACHITA YOSHITO , NAKAJIMA ICHIRO , SUGAYA YASUSHI , GOTO RYOSUKE
IPC分类号： H04B10/07 , H04B10/077 , H04B10/29 , H04B10/296 , H04J14/00 , H04J14/02
CPC分类号： H04B10/07955 , H04J14/0212 , H04J14/0221
摘要： PROBLEM TO BE SOLVED: To accurately determine a power level and a wavelength of a WDM signal at each channel, using the fewest light-receiving elements. SOLUTION: Information on a bit rate and a modulation method at each channel is informed to each WDM (Wavelength Division Multiplex) transmission apparatus, using an OSC (optical supervisory channel). A waveform search portion 72 refers to the waveform database 70 based on this information, and determines an approximated waveform according to the informed bit rate and the informed modulation method at each channel. A waveform approximation portion 74 approximates a measured value by the approximated waveform, and determines a power level and a wavelength. Tilting compensation is performed, based on the result. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：使用最少的光接收元件来精确地确定每个通道处的WDM信号的功率电平和波长。解决方案：使用OSC（光监控通道）向每个WDM（波分复用）发送装置通知每个信道上的比特率和调制方法的信息。波形搜索部分72基于该信息参考波形数据库70，并根据通知的比特率和每个信道的通知调制方法确定近似波形。波形近似部分74通过近似波形近似测量值，并确定功率电平和波长。根据结果进行倾斜补偿。版权所有（C）2009，JPO＆INPIT

15. 发明专利

JP2008182679A Distributed raman amplifier and wdm optical transmission system 有权
标题翻译：分布式拉曼放大器和波分复用光传输系统
公开(公告)号：JP2008182679A
公开(公告)日：2008-08-07
申请号：JP2007321775
申请日：2007-12-13
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUGAYA YASUSHI
IPC分类号： H04B10/29 , G02F1/35 , H01S3/30 , H04B10/07 , H04B10/294 , H04J14/00 , H04J14/02
CPC分类号： H01S3/302 , H01S3/06758 , H01S3/094096 , H01S3/10015 , H01S3/1301 , H01S3/1305 , H01S2301/04
摘要： PROBLEM TO BE SOLVED: To realize a low-cost distributed Raman amplifier of a simple configuration, capable of realizing an automatic gain-fixed control with high precision and also capable of compensating for gain wavelength characteristics using a fixed gain equalizer, and a WDM optical transmission system using the same. SOLUTION: In the distributed Raman amplifier, a WDM signal light and a reference light Lr are supplied to one end of an optical transmission path 2 to which pumping lights Lp1-Lp3 are supplied; the WDM signal light and the reference light, which are propagated through the optical transmission path 2, are subjected to the distributed Raman amplification; the powers of the WDM signal light and the reference light, which are output from the other end of the optical transmission path 2, are monitored; and pumping light sources 11-13 are controlled based on the monitor result. A wavelength of the reference light Lr is set within a gain band of the distributed Raman amplification but longer or shorter than a wavelength of the WDM signal light, and also, set to be in a wavelength region in which a fluctuation amount of a Raman gain generated in the wavelength of the reference light Lr becomes equal to or smaller than 1.5 of a fluctuation amount of a Raman gain generated in the wavelength band of the WDM signal light. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：解决的问题：为了实现简单配置的低成本分布式拉曼放大器，能够以高精度实现自动增益固定控制，并且还能够使用固定增益均衡器来补偿增益波长特性，以及一种使用其的WDM光传输系统。解决方案：在分布式拉曼放大器中，将WDM信号光和参考光Lr提供给提供泵浦光Lp1-Lp3的光传输路径2的一端; 通过光传输路径2传播的WDM信号光和参考光经受分布式拉曼放大; 监视从光传输路径2的另一端输出的WDM信号光和参考光的功率; 并且基于监视器结果来控制泵浦光源11-13。参考光Lr的波长被设定在分布式拉曼放大的增益带内，但比WDM信号光的波长长或短，并且也被设置在波长范围内，其中拉曼增益的波动量在参考光Lr的波长中产生的波长为在WDM信号光的波长带中产生的拉曼增益的波动量的1.5以下。版权所有（C）2008，JPO＆INPIT

16. 发明专利

JP2007312155A Wavelength multiplex optical transmission system and its management method 有权
标题翻译：波长多重光传输系统及其管理方法
公开(公告)号：JP2007312155A
公开(公告)日：2007-11-29
申请号：JP2006139820
申请日：2006-05-19
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUGAYA YASUSHI
IPC分类号： H04B10/077 , H04B10/079 , H04B10/29 , H04B10/293 , H04B10/296 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02
CPC分类号： H04J14/0221
摘要： PROBLEM TO BE SOLVED: To limit a difference between an output level of an optical amplifier and a regular level at the time of a change in the number of channels such that it falls within a range where no signal transmission error happens.
SOLUTION: In a wavelength multiplex optical transmission system wherein an optical node device for relaying and transmitting wavelength multiplex light is disposed at a predetermined node of a main line system optical transmission line, an optical amplifier 13
2 , when noticed about a change in a multiplex number, is changed to constant gain control, and resumes level control such that a target level associated with an actual wavelength multiplex number is attained after predetermined time. At this time, an optical transmission system management 51 controls the optical transmission system such that a relation T
摘要翻译：要解决的问题：为了限制光放大器的输出电平与通道数量变化时的规律电平之间的差异，以使其落在不发生信号传输错误的范围内。解决方案：在其中用于中继和发送波长多路复用光的光节点装置设置在主线路系统光传输线路的预定节点的波分复用光传输系统中，光放大器13 2 ，当注意到多路复用数字的变化时，改变为恒定增益控制，并且恢复电平控制，使得在预定时间之后获得与实际波长多路复用数相关联的目标电平。此时，光传输系统管理51控制光传输系统，使得当时间被定义为T直到从波长多路复用数目改变开始恒定增益控制之后，满足关系T

17. 发明专利

JP2006279610A Optical transmission apparatus 有权
标题翻译：光传输装置
公开(公告)号：JP2006279610A
公开(公告)日：2006-10-12
申请号：JP2005096531
申请日：2005-03-29
申请人： Fujitsu Ltd , 富士通株式会社
发明人： ONAKA YOSHINORI , SUGAYA YASUSHI , OOI HIROMI
IPC分类号： H04B10/00 , H04B10/077 , H04B10/079 , H04B10/2507 , H04B10/2525 , H04B10/2537 , H04B10/2543 , H04B10/27 , H04B10/29 , H04B10/296 , H04B10/297 , H04J14/00 , H04J14/02
CPC分类号： H04J14/0221 , H04B10/296 , H04B2210/003 , H04B2210/256 , H04J14/0201 , H04J14/0212
摘要： PROBLEM TO BE SOLVED: To provide an optical transmission apparatus capable of reducing the initial introduction cost, flexibly extending its function in response to the tendency of high power and a long distance and realizing OSNR improvement at a low cost at extending the function. SOLUTION: The optical transmission apparatus includes an OADM 102 located on an optical transmission line 101 and adding and dropping an optical signal; a Preamplifier section 103 located at a pre-stage of the OADM 102; and a post amplifier section 104 located at a post-stage of the OADM 102. The Post amplifier section 104 includes: a dispersion compensation fiber 111 and an excitation light multiplexer 124a located at the post stage of the OADM 102; and an excitation light source 125a connected to the excitation light multiplexer 124a at the extension of the function of the optical transmission apparatus and for applying Raman amplification to the dispersion compensation fiber 111. The Preamplifier section 103 includes a excitation light multiplexer 114a and an excitation light source 115a connected at the extension of the function of the optical transmission apparatus and for applying Raman amplification to the signal on the transmission line 101. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供能够降低初始引入成本的光传输装置，响应于高功率和长距离的趋势灵活地扩展其功能，并且在扩展功能的同时以低成本实现OSNR的改进。光传输装置包括：位于光传输线101上的OADM 102，并且添加和删除光信号; 位于OADM 102的前级的前置放大器部分103; 以及位于OADM 102的后级的后置放大器部分104.后置放大器部分104包括：位于OADM 102的后级的色散补偿光纤111和激发光复用器124a; 以及在光传输装置的功能扩展处连接到激发光多路复用器124a并用于向色散补偿光纤111施加拉曼放大的激发光源125a。前置放大器部分103包括激发光多路复用器114a和激发光源115a，其连接在光传输装置的功能的扩展上，并用于对传输线101上的信号进行拉曼放大。版权所有（C）2007，JPO＆INPIT

18. 发明专利

JP2006148961A Wavelength multiplex optical transmission system using remote excitation system 有权
标题翻译：使用远程激励系统的波长多光子传输系统
公开(公告)号：JP2006148961A
公开(公告)日：2006-06-08
申请号：JP2005380365
申请日：2005-12-28
申请人： Fujitsu Ltd , 富士通株式会社
发明人： SUGAYA YASUSHI , CHIKAMA TERUMI
IPC分类号： H01S3/10 , H04B10/29 , H04B10/296 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To properly adjust the level of the light of each channel which is multiplexed into wavelength multiplex light, in an optical transmission system that remotely controls an optical fiber amplifier for amplifying wavelength multiplexed light. SOLUTION: The wavelength multiplex light that is outputted from a transmitter station 10 is amplified by an EDF47 and then is transmitted to a receiver station 20. Exciting light generated by a light source 71 which is provided in the transmitter station 10 is supplied to the EDF47. A control circuit 72 detects the number of channels which are multiplexed into wavelength multiplexed light and adjusts exciting light power according to the number of channels. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：在远程控制用于放大波长复用光的光纤放大器的光传输系统中，适当地调整复用到波长多路复用光中的每个通道的光的电平。解决方案：从发射机站10输出的波长多路复用光被EDF47放大，然后被发送到接收站20.提供在发射机站10中提供的由光源71产生的激发光到EDF47。控制电路72检测被多路复用为波长复用光的通道数，并根据通道数调节激发光功率。版权所有（C）2006，JPO＆NCIPI

19. 发明专利

JP2004279557A Optical amplifier equipped with connection loss detecting function 有权
公开(公告)号：JP2004279557A
公开(公告)日：2004-10-07
申请号：JP2003068289
申请日：2003-03-13
申请人： Fujitsu Ltd , 富士通株式会社
发明人： NISHIHARA MASATO , SUGAYA YASUSHI , HAYASHI ETSUKO
IPC分类号： G02F1/35 , H01S3/06 , H01S3/067 , H04B10/07 , H04B10/071 , H04B10/079 , H04B10/29 , H04B10/294 , H04B10/08 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide an optical amplifier with which power of light passing through a connection point is certainly controlled by accurately detecting deterioration of a connection state at a connection point on the optical path. SOLUTION: With respect to a construction to amplify signal light Ls by supplying pump light Lp generated in a pump unit A to an optical amplifying medium B, an optical amplifier equipped with a connection loss detecting function is provided with a connection loss measuring part C making measuring light Lm different from the signal light Ls incident on an optical path between the pump unit A and the optical amplifying medium B and measuring connection loss at one or more connection points existing on the optical path based on reflected light and backscattering light of the measuring light Lm generated in the optical path and a controlling part D controlling a supplied state of the pump light Lp by the pump unit A corresponding to the connection loss measured at the connection loss measuring part C. COPYRIGHT: (C)2005,JPO&NCIPI

20. 发明专利

JP2004006887A OPTICAL TRANSMISSION APPARATUS AND WAVELENGTH MULTIPLEXING OPTICAL COMMUNICATION SYSTEM 审中-公开
公开(公告)号：JP2004006887A
公开(公告)日：2004-01-08
申请号：JP2003148588
申请日：2003-05-27
申请人： FUJITSU LTD
发明人： SUGAYA YASUSHI , TAKEDA YOSHINORI , KINOSHITA SUSUMU , CHIKAMA TERUMI
IPC分类号： H01S3/10 , H04B10/07 , H04B10/29 , H04B10/293 , H04B10/294 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide an optical transmission apparatus and a wavelength multiplexing optical communication system using the same, which have gains independent of the wavelengths of optical signals and are capable of amplifying wavelength multiplexing optical signals collectively. SOLUTION: The optical transmission apparatus is equipped with a first optical amplifying means (pre-stage optical amplifier 1) which amplifies the input wavelength multiplexing optical signals by the controlled gains, an optical variable attenuating means (variable optical attenuator 11) which attenuates the first amplified optical signals amplified by the first optical amplifying means by the controlled amount of attenuation, and a second optical amplifying means (post-stage optical amplifier 2) which amplifies the first amplified optical signals attenuated by the optical variable attenuating means by the controlled gains to output the second amplified optical signals. The optical transmission apparatus controls the optical variable attenuating means on the basis of the first amplified optical signals or the second amplified optical signals and sends out the wavelength multiplexing signals as amplifying them. COPYRIGHT: (C)2004,JPO

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