专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

71. 发明专利

JP2004080301A Method and system for monitoring distributed raman optical transmission line 审中-公开
公开(公告)号：JP2004080301A
公开(公告)日：2004-03-11
申请号：JP2002236904
申请日：2002-08-15
申请人： Kddi Submarine Cable Systems Inc , Mitsubishi Electric Corp , ケイディディアイ海底ケーブルシステム株式会社 , 三菱電機株式会社
发明人： IMAI KAORU , KUROSAWA YOKO , EDAKAWA NOBORU , SAKATA HARUHISA
IPC分类号： H01S3/00 , H01S3/0941 , H01S3/13 , H01S3/30 , H04B10/07 , H04B10/071 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/291 , H04B10/08 , H04B10/16 , H04B10/17
CPC分类号： H04B10/2916 , H01S3/0941 , H01S3/1305 , H01S3/302 , H04B10/03 , H04B10/07955 , H04B10/0797
摘要： PROBLEM TO BE SOLVED: To conveniently discriminate a trouble of cable from a trouble of Raman pumping light.
SOLUTION: A pumping LD 22 generates a Raman pumping light of wavelength λp being fed through an optical circulator 20 to an optical fiber 12. A light receiving unit 24 monitors output power of the pumping LD 22. An optical demultiplexer 26 feeds the light entering an optical repeater 14 from the optical fiber 12, substantially entirely, to an optical isolator 28 and feeds the remainder to an optical demultiplexer 30. The optical demultiplexer 30 separates an input light into an optical signal Sa component and a component of wavelength λp. Light receiving units 32 and 34 convert the signal light component and the component of wavelength λp separated by means of the optical demultiplexer 30 into electric signals. A comparator 36 compares the outputs from the light receiving units 32 and 34 with a normal level stored in a storage 38 and judges presence and cause of a trouble in Raman amplification on the optical fiber 12.
COPYRIGHT: (C)2004,JPO

72. 发明专利

JP3502546B2 Optical amplification relay transmission system 有权
公开(公告)号：JP3502546B2
公开(公告)日：2004-03-02
申请号：JP22906498
申请日：1998-08-13
申请人：日本電信電話株式会社
发明人：崇雅今井 , 誠村上 , 俊哉松田
IPC分类号： H04B10/2507 , H04B10/2513 , H04B10/2563 , H04B10/29 , H04B10/294 , H04B10/16 , H04B10/02 , H04B10/17 , H04B10/18

73. 发明专利

JP2004064500A Optical repeater 有权
公开(公告)号：JP2004064500A
公开(公告)日：2004-02-26
申请号：JP2002221195
申请日：2002-07-30
申请人： Nec Corp , 日本電気株式会社
发明人： YAMAGUCHI SHOHEI
IPC分类号： H01S3/067 , H01S3/094 , H01S3/10 , H04B10/00 , H04B10/03 , H04B10/07 , H04B10/29 , H04B10/293 , H04B10/297 , H04B10/16 , H04B10/17
CPC分类号： H01S3/06754 , H01S3/0912 , H01S3/094011 , H01S3/094061 , H01S3/09415 , H01S3/1301 , H01S3/302
摘要： PROBLEM TO BE SOLVED: To provide an optical repeater capable of independently controlling the amplification factor of a pair of optical lines, and improving reliability by adopting a redundant configuration. SOLUTION: Stimulation light beams outputted from a first stimulation laser part 45 are inputted through a first 3dB coupler 21 to a WDM coupler 11 for backward stimulation arranged in an optical fiber 71 of an incoming line and a WDM coupler 14 for forward stimulation arranged in an optical fiber 72 of an outgoing line. Then, stimulation light beams outputted from a second stimulation laser part 46 are inputted through a second 3dB coupler 22 to a WDM coupler 13 for backward stimulation arranged in the optical fiber 72 of the outgoing line and a WDM coupler 12 for forward stimulation arranged in the optical fiber 71 of the incoming line. Optical signals propagating through respective optical fibers 71 and 72 are amplified at a desired amplification factor by independently controlling the both stimulation light beams. COPYRIGHT: (C)2004,JPO

74. 发明专利

JP2004048656A Optical communication system, signal relay apparatus, and optical communication connector 审中-公开
公开(公告)号：JP2004048656A
公开(公告)日：2004-02-12
申请号：JP2003058865
申请日：2003-03-05
申请人： Yazaki Corp , 矢崎総業株式会社
发明人： SAITO YOSHINORI , NORIZUKI AKIRA
IPC分类号： G02B6/36 , B60R16/02 , B60R16/023 , H04B10/25 , H04B10/275 , H04B10/29 , H04N7/22 , H04N21/61 , H04B10/16 , H04B10/12 , H04B10/13 , H04B10/135 , H04B10/14 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To optimize wiring of an optical transmission line in a ring type optical network and to easily extend an electric apparatus.
SOLUTION: A J/B in the ring type optical network is provided with a fourth photoelectric conversion section 34 connected to another J/B, a first photoelectric conversion section 31, a second photoelectric conversion section 32 and a third photoelectric conversion section 33 to/from which extension connectors are attached/detached. When an optical signal is inputted from the fourth photoelectric conversion section 34, it is relayed by the third photoelectric conversion section 33, the second photoelectric conversion section 32 and the first photoelectric conversion section 31. At such a time, in the photoelectric conversion sections 31-34, photoelectric conversion is performed and the signal is amplified to a prescribed level. In the photoelectric conversion sections 31-33, when the extension connectors are not connected, switch circuits 41-43 are closed state. When the extension connectors are connected, the switch circuits 41-43 are opened.
COPYRIGHT: (C)2004,JPO

75. 发明专利

JP3487253B2 失效
公开(公告)号：JP3487253B2
公开(公告)日：2004-01-13
申请号：JP2000063121
申请日：2000-03-08
IPC分类号： H04B3/46 , H04B3/48 , H04B10/07 , H04B10/077 , H04B10/29 , H04B10/297 , H04B17/00 , H04J14/00 , H04J14/02 , H04B10/08 , H04B10/16 , H04B10/17

76. 发明专利

JP2003347632A Optical amplifier, optical fiber transmission line, and light transmission control method 有权
标题翻译：光放大器，光纤传输线和光传输控制方法
公开(公告)号：JP2003347632A
公开(公告)日：2003-12-05
申请号：JP2002153933
申请日：2002-05-28
申请人： Nec Corp , 日本電気株式会社
发明人： MINO KATSUYUKI
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H04B10/032 , H04B10/079 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02 , H04B10/16 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To solve the difficulty in a prior-art optical amplifier that the types of optical amplifiers disposed on an optical fiber transmission line at a predetermined distance include a predetermined optical output control system and a predetermined gain control system, which have merits and demerits, and when any trouble occurs on the optical fiber transmission line and there is lowered the level of propagating wavelength multiple signal light, it is difficult in the prior-art optical amplifier to remove the trouble. SOLUTION: There are provided a predetermined optical output control optical amplifier and an optical amplifier of the type of predetermined gain control including a loop circuit for oscillating spontaneous emission light outputted from the predetermined optical output control optical amplifier. When any trouble occurs on an optical fiber transmission line on which the optical amplifier is disposed, a variable optical attenuator disposed in the loop circuit is controlled to control the gain of the predetermined optical output control optical amplifier and hence recover the level of wavelength multiple signal light and the gain tilt of the same. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题为了解决现有技术的光放大器中在预定距离处设置在光纤传输线上的光放大器的类型包括预定光输出控制系统和预定增益控制系统的困难，具有优点和缺点，并且当在光纤传输线上出现任何故障并且传播波长多信号光的电平降低时，在现有技术的光放大器中难以消除故障。提供一种预定的光输出控制光放大器和预定增益控制类型的光放大器，包括用于振荡从预定光输出控制光放大器输出的自发发射光的环路电路。当配置有光放大器的光纤传输线上发生故障时，设置在环路电路中的可变光衰减器被控制，以控制预定的光输出控制光放大器的增益，从而恢复波长多信号的电平光和增益倾斜相同。版权所有（C）2004，JPO

77. 发明专利

JP3471599B2 Gain equalizer 失效
标题翻译：空值
公开(公告)号：JP3471599B2
公开(公告)日：2003-12-02
申请号：JP6258498
申请日：1998-03-13
申请人：富士通株式会社
发明人：泰一武田
IPC分类号： G02B6/00 , G02B6/24 , G02B6/26 , G02B6/44 , H01S3/06 , H01S3/067 , H01S3/10 , H04B10/25 , H04B10/29 , H04B10/294 , H04B10/16 , H04B10/17
CPC分类号： G02B6/2746 , G02B6/4428 , H04B10/294

78. 发明专利

JP2003337290A Optical element variable in transmission wavelength characteristic, wavelength characteristic variable device using the same, optical amplifier and optical transmission system 有权
标题翻译：传输波长特性，波长特性可变设备，光放大器和光传输系统变化的光学元件
公开(公告)号：JP2003337290A
公开(公告)日：2003-11-28
申请号：JP2002146643
申请日：2002-05-21
申请人： Fujitsu Ltd , 富士通株式会社
发明人： IZUMI HIROTOMO , ISHIWADA TAKASHI , MITAMURA NOBUAKI
IPC分类号： G02B26/00 , G02B27/28 , G02F1/09 , G02F1/21 , H01S3/067 , H01S3/10 , H01S3/106 , H01S3/13 , H04B10/29 , H04B10/291 , H04B10/293 , H04B10/564 , H04B10/572 , H04B10/04 , H04B10/06 , H04B10/14 , H04B10/16 , H04B10/17
CPC分类号： G02F1/09 , G02B26/00 , G02F1/21 , G02F2001/213 , G02F2203/05 , H01S3/06754 , H01S3/1003 , H01S3/1062 , H01S3/1301 , H01S2301/04
摘要： PROBLEM TO BE SOLVED: To easily realize an optical element capable of changing a periodic transmission wavelength characteristic in the axial direction of transmittance and changing a periodic characteristic with respect to a wavelength with an etalon type configuration. SOLUTION: This optical element variable in transmission wavelength characteristic is constituted by being provided with a light interference part 1 wherein a pair of wedge-shaped magneto-optical crystals 1A and 1A' is arranged with taper surfaces in close contact with each other and which can change a distance between reflectors 1B and 1B' formed on parallel planes by making moving parts 1C and 1C' relatively move the respective magneto-optical crystals 1A and 1A', permanent magnets 2a and 2b for giving a fixed magnetic field to the pair of magneto-optical crystals 1A and 1A', an electromagnet 3 for giving a variable magnetic field in a direction different from that of the fixed magnetic field, and a variable current source 4 for controlling current flowing to the electromagnet 3. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了容易地实现能够改变透射率的轴向上的周期性透射波长特性并且相对于具有标准具型配置的波长改变周期性特性的光学元件。解决方案：透射波长特性可变的光学元件由设置有光干涉部分1构成，其中一对楔形磁光晶体1A和1A'布置成彼此紧密接触的锥形表面并且通过使运动部分1C和1C'使相应的磁光晶体1A和1A'，永磁体2a和2b相对移动，从而可以改变形成在平行平面上的反射器1B和1B'之间的距离，以给予固定磁场一对磁光晶体1A和1A'，用于在与固定磁场不同的方向上给出可变磁场的电磁体3以及用于控制流向电磁体3的电流的可变电流源4。版权所有（C）2004，JPO

79. 发明专利

JP2003332995A Optical fiber amplifier, method of monitoring excitation light source and optical transmitter 有权
标题翻译：光纤放大器，激光源和光发射器监测方法
公开(公告)号：JP2003332995A
公开(公告)日：2003-11-21
申请号：JP2002133713
申请日：2002-05-09
申请人： Toshiba Corp , 株式会社東芝
发明人： KUSAMA KATSUMI , TANIKOSHI SADAO
IPC分类号： H01S3/06 , H01S3/067 , H01S3/10 , H04B10/07 , H04B10/077 , H04B10/079 , H04B10/29 , H04B10/291 , H04B10/524 , H04B10/16 , H04B10/08 , H04B10/17
摘要： PROBLEM TO BE SOLVED: To provide an optical fiber amplifier which are capable of always monitoring a state of an excitation light source while preventing an optical surge, a method of monitoring the excitation light source and an optical transmission device. SOLUTION: A pulse modulation signal is supplied from a pulse width modulator 13 to a driver 14 to oscillate an excitation LD 7 in a pulse. The state of an input optical signal 1 is detected by an input interruption detector 10, and the pulse width of the pulse modulation signal is switched, depending on whether an input interruption is detected or not. In a normal mode in which the signal interruption is not detected, the pulse width is set so that an output average value of the excitation LD 7 becomes a prescribed value. In a standby mode in which the signal interrupt has been detected, the pulse width is set so that the output average value of the excitation LD 7 becomes substantial zero. In this way, even in the standby mode, the abnormality of the excitation LD 7 is confirmed by monitoring an output light of the excitation LD 7 which emits light intermittently. COPYRIGHT: (C)2004,JPO
摘要翻译：解决的问题：提供能够始终监视激励光源的状态同时防止光波动的光纤放大器，监视激励光源的方法和光传输装置。解决方案：脉冲调制信号从脉冲宽度调制器13提供给驱动器14以使脉冲中的激励LD 7振荡。由输入中断检测器10检测输入光信号1的状态，根据是否检测到输入中断，切换脉冲调制信号的脉冲宽度。在未检测到信号中断的正常模式下，设定脉冲宽度，使得激励LD7的输出平均值成为规定值。在已经检测到信号中断的待机模式中，设置脉冲宽度，使得激励LD 7的输出平均值变为基本为零。以这种方式，即使在待机模式下，通过监视间歇发光的激励LD7的输出光来确认激励LD7的异常。版权所有（C）2004，JPO

80. 发明专利

JP2003324391A System and method for amplifying signal in optical network 审中-公开
标题翻译：在光网络中放大信号的系统和方法
公开(公告)号：JP2003324391A
公开(公告)日：2003-11-14
申请号：JP2003083700
申请日：2003-03-25
申请人： Fujitsu Ltd , 富士通株式会社
发明人： KINOSHITA SUSUMU
IPC分类号： G02F1/35 , H01S3/10 , H01S3/30 , H04B10/08 , H04B10/16 , H04B10/17
CPC分类号： H04B10/2916
摘要： PROBLEM TO BE SOLVED: To provide a system and method for amplifying signals in an optical network. SOLUTION: The optical network comprises a plurality of nodes connected by an optical fiber. The nodes each comprise a pump combiner coupled to the optical fiber and for applying pump power to the fiber and performing Raman amplification of a signal in a connected section of the optical fiber. A pump source remote from the nodes and coupled to the pump combiners is operable to provide pump power to each of the pump combiners for Raman amplification. COPYRIGHT: (C)2004,JPO

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式