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91. 发明专利

JP2005333268A Optical limiter amplifier 有权
标题翻译：光学极限放大器
公开(公告)号：JP2005333268A
公开(公告)日：2005-12-02
申请号：JP2004148306
申请日：2004-05-18
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： ITO TOSHIO , SATOU RIEKO , AKATSU YUJI
IPC分类号： H04B10/2507 , H04B10/40 , H04B10/50 , H04B10/524 , H04B10/556 , H04B10/60 , H04B10/02 , H04B10/00 , H04B10/18 , H04B10/28
摘要： PROBLEM TO BE SOLVED: To provide an optical limiter amplifier for suppressing waveform deterioration due to a pattern effect while keeping an excellent optical limiter function.
SOLUTION: An input output port 102 of a wavelength coupler 101 receives a signal 100 with a wavelength λ1, one terminal of a wavelength conversion element 106 is connected to an input output port 103, and one terminal of an optical limiter amplifier 112 is connected to an input output port 104. An input output port 108 of a wavelength coupler 107 is connected to the other terminal of the wavelength conversion element 106, and an input output port 109 is connected to the other terminal of the optical limiter amplifier 112. A light source 113 is connected to an input output port 111 of the wavelength coupler 107. An input optical signal with a first wavelength is given to one terminal of the optical limiter amplifier 112, an inverted signal with a second wavelength resulting from inverting a logic code of the input optical signal is given to the other terminal of the optical limiter amplifier 112, and the optical signal with the first wavelength having prescribed lumminous intensity is outputted from the other terminal of the optical limiter amplifier 112.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于抑制由于图案效应引起的波形恶化的光限幅放大器，同时保持优异的光限制器功能。解决方案：波长耦合器101的输入输出端口102接收具有波长λ1的信号100，波长转换元件106的一个端子连接到输入输出端口103，光限幅放大器112的一个端子连接到输入输出端口104.波长耦合器107的输入输出端口108连接到波长转换元件106的另一端，并且输入输出端口109连接到光限幅放大器112的另一端光源113连接到波长耦合器107的输入输出端口111.具有第一波长的输入光信号被提供给光限幅放大器112的一个端子，由反相信号产生的具有第二波长的反相信号输入光信号的逻辑代码被赋予光限幅放大器112的另一端，第一波长的光信号具有规定的亮度从光限幅放大器112的另一端输出。版权所有（C）2006，JPO＆NCIPI

92. 发明专利

JP2005006138A Reflection type optical communication system utilizing polarized wave, and station and user terminal used therefor 审中-公开
标题翻译：使用偏振波的反射型光通信系统及其使用的站点和用户终端
公开(公告)号：JP2005006138A
公开(公告)日：2005-01-06
申请号：JP2003168750
申请日：2003-06-13
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： ITO TOSHIO , SATOU RIEKO , SUZUKI YASUHIRO , TOBA HIROSHI
IPC分类号： H04B10/00 , H04B10/2507 , H04B10/2587 , H04B10/524 , H04J14/08 , H04B10/24
摘要： PROBLEM TO BE SOLVED: To provide a reflection type optical communication system utilizing polarized waves, and a station and a user terminal used therefor, capable of carrying out transmission and reception of optical signals with high quality by suppressing the effect of the Rayleigh scattering caused between the uplink and downlink optical signals.
SOLUTION: The station K transmits a continuous light Pc and a downlink optical signal Pd to the user terminal U via an optical fiber 104. In this case, the polarization direction of the continuous light Pc is differentiated from that of the downlink optical signal Pd. A downlink optical signal receiver 107 of the user terminal U receives the downlink optical signal Pd. Further, an optical limiter amplifier 114 decreases the extinction ratio of the downlink optical signal Pd. A reflection type optical modulator 106 modulates the continuous light Pc to generate an active uplink optical signal Pu1 and modulates the downlink optical signal Pd the extinction ratio of which is decreased to generate a standby uplink optical signal Pu2. The two optical signals Pu1, Pu2 are transmitted to the station K wherein an uplink optical signal receiver 108 receives the signals. Even if the polarization direction of either of the uplink optical signals Pu1, Pu2 is coincident with that of the down link optical signals Pc, Pd and the waveform is disturbed by the Rayleigh scattering, the polarization direction of the other of the uplink optical signals Pu1, Pu2 is not coincident with the polarization direction of the downlink optical signals Pc, Pd, thereby enabling excellent signal transmission.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供利用偏振波的反射型光通信系统及其使用的站和用户终端，能够通过抑制瑞利的效果来高质量地发送和接收光信号在上行链路和下行链路光信号之间引起的散射。解决方案：站K经由光纤104向用户终端U发送连续的光Pc和下行链路光信号Pd。在这种情况下，连续光Pc的偏振方向与下行光纤的偏振方向不同信号Pd。用户终端U的下行光信号接收机107接收下行光信号Pd。此外，光限幅放大器114降低下行光信号Pd的消光比。反射型光调制器106对连续光Pc进行调制，生成有源上行光信号Pu1，对其消光比降低的下行光信号Pd进行调制，生成备用上行光信号Pu2。两个光信号Pu1，Pu2被发送到站K，其中上行光信号接收器108接收信号。即使上行光信号Pu1，Pu2中的任一方的偏振方向与下行链路光信号Pc，Pd的偏振方向一致，波形被瑞利散射干扰，另一方的上行光信号Pu1的偏振方向，Pu2与下行光信号Pc，Pd的偏振方向不一致，能够实现良好的信号传输。版权所有（C）2005，JPO＆NCIPI

93. 发明专利

JP2004048542A Polarization mode dispersion suppressing and transmitting device 审中-公开
公开(公告)号：JP2004048542A
公开(公告)日：2004-02-12
申请号：JP2002205286
申请日：2002-07-15
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： ITO TOSHIO , SATOU RIEKO , SUZUKI YASUHIRO
IPC分类号： G02B6/024 , G02F1/01 , G02F1/35 , H04B10/2507 , H04B10/2569 , H04J14/00 , H04J14/02 , H04B10/02 , G02B6/17 , H04B10/18
摘要： PROBLEM TO BE SOLVED: To compensate the polarization mode dispersion of a wavelength multiplexing optical pulse even when the wavelength multiplexing optical pulse is inputted. SOLUTION: A polarization mode dispersion suppressing and transmitting device 500 is configured of an optical fiber 501 and an optical fiber 527 for applying polarization mode dispersion, and arranged at the input stage of a polarization mode dispersion suppressing device 550. The polarization dispersion mode of the polarization mode dispersion suppressing and transmitting device 500 increases/decreases in a B(nm) cycle on a wavelength axis. A wavelength band A(nm) of each of inputted wavelength multiplexing optical pulses 502 and 524 to 526 is made larger than the B (for example, 5 times or more). When the optical pulses 502 and 524 to 526 having the wide wavelength bands are inputted to the wavelength mode dispersion suppressing and transmitting device 500, the whole polarization mode dispersion is averaged so as to be set as a fixed value(which is almost 0). COPYRIGHT: (C)2004,JPO

94. 发明专利

JP2003008125A Measuring device and measuring method for semiconductor optical amplifier 审中-公开
标题翻译：半导体光学放大器的测量装置和测量方法
公开(公告)号：JP2003008125A
公开(公告)日：2003-01-10
申请号：JP2001185847
申请日：2001-06-20
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： ITO TOSHIO , MAGARI KATSUAKI , SATOU RIEKO , SUZUKI YASUHIRO
IPC分类号： H01S5/00 , H01S5/50
摘要： PROBLEM TO BE SOLVED: To accurately find out the element optical amplification factor of a semiconductor optical amplifier, or the input side coupling efficiency or output side coupling efficiency thereof.
SOLUTION: The intensity of outputted light at the time when a single wavelength light emitted form a single wavelength light source 601 is inputted to a semiconductor optical amplifier 602 is measured with a power meter 607 to obtain an amplification factor β between fibers, and furthermore, the intensity of outputted light at the time when a large wavelength band light emitted from a large wavelength and light source 602 is inputted to the semiconductor optical amplifier 602 is measured with the power meter 607 to obtain an amplification factor β between fibers. In addition, the gain ripple V of the semiconductor optical amplifier is obtained. Then, the following formulas (1) and (2), V=[(1+Rg)
2 /(1-Rg)
2 ] and γ/β=[(1-R)
2 /(1-Rg)
2 ], are used to find out an element optical amplification factor g.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：准确找出半导体光放大器的元件光放大系数，或其输入端耦合效率或输出端耦合效率。解决方案：通过功率计607测量从单个波长光源601发射的单个波长光被输入到半导体光放大器602时的输出光的强度，以获得光纤之间的放大系数β，此外，通过功率计607测量从大波长发射的大波长带光和光源602输出到半导体光放大器602的输出光的强度，以获得光纤之间的放大系数β。此外，获得半导体光放大器的增益纹波V. 然后，以下式（1）和（2），V = [（1 + Rg）2 /（1-Rg）2]]和γ/β= [（1-R） 1-Rg）2]，用于找出元素光学放大因子g。

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