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公开(公告)号：US20050213991A1
公开(公告)日：2005-09-29
申请号：US11132937
申请日：2005-05-19
IPC分类号： G02F1/01 , H04B10/2507 , H04B10/532 , H04B10/04
CPC分类号： H04B10/2572 , G02F1/0136 , G02F2001/0139 , H04B10/532
摘要： To generate light with the degree of polarization zeroed and the spread of an optical spectrum suppressed even with temporal overlapping between optical pulses each of which is polarized orthogonally to the succeeding pulse, a polarization scrambler includes an optical pulse generator that generates optical pulses with an intensity waveform repetition T/2 and an electrical field repetition period T in which the same intensity waveform is repeated every repetition period T/2 and in which phase is inverted every repetition period T/2, and an orthogonal polarization delay unit which receives each of the optical pulses, separates the optical pulse into two optical pulses with orthogonal states of polarization, and relatively shifts the temporal position of one of the two optical pulses from that of the other optical pulse by (2n−1)T/4 (n is a natural number) to generate light in which each pulse is polarized orthogonally to a succeeding pulse.
摘要翻译： 为了产生具有归零度的光，并且即使光学脉冲之间的时间重叠也抑制光谱的扩展，每个光脉冲与后续脉冲正交地极化，偏振加扰器包括产生具有强度的光脉冲的光脉冲发生器 波形重复T / 2和电场重复周期T，其中每个重复周期T / 2重复相同的强度波形，并且每个重复周期T / 2对相位进行反相，并且正交偏振延迟单元接收每个 光脉冲将光脉冲分离成具有正交偏振态的两个光脉冲，并将两个光脉冲之一的时间位置从另一个光脉冲的时间位置相对移位（2n-1）T / 4（n为 自然数）以产生其中每个脉冲与后续脉冲正交极化的光。
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公开(公告)号：US06583924B2
公开(公告)日：2003-06-24
申请号：US10187732
申请日：2002-06-27
申请人： Hiroji Masuda , Junichi Kani , Noboru Takachio
发明人： Hiroji Masuda , Junichi Kani , Noboru Takachio
IPC分类号： H04B1012
CPC分类号： H04B10/294 , H04B2210/258
摘要： In the optical amplifier an optical divider based on long wavelength (or short wavelength) transmission type dielectric multi-layer filter divides input signal light according to wavelengths, and amplifying sections disposed in parallel and having different respective wavelength amplification regions respectively amplify light signals emitted from the optical divider, and an optical combiner based on long wavelength (or short wavelength) transmission type dielectric multi-layer filter combines light signals output from the respective amplifying sections. In another configuration of the optical amplifier, input signal light is divided using an optical divider based on a dielectric multi-layer filter of a long wavelength (or short wavelength) transmission type, and output signals from the divider are filtered using an optical filter connected in series to a short wavelength (or long wavelength) amplifier generating a loss in the long wavelength (or short wavelength) region of the light signals. Interference noise caused by residual reflection components in the dielectric multi-layer filter is thus suppressed, thereby increasing the bandwidth of useable wavelengths in the signal light.
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3.发明申请公开(公告)号：US20070031146A1
公开(公告)日：2007-02-08
申请号：US11580568
申请日：2006-10-12
申请人： Noboru Takachio , Katsumi Iwatsuki , Hitoshi Obara
发明人： Noboru Takachio , Katsumi Iwatsuki , Hitoshi Obara
IPC分类号： H04B10/00
CPC分类号： H04J14/029 , H04B10/271 , H04B10/272 , H04B10/2755 , H04J14/02 , H04J14/0282 , H04J14/0283 , H04J14/0286 , H04Q11/0062 , H04Q11/0067 , H04Q2011/0086
摘要： An optical wavelength division multiplexing network has a multi-level structure where a plurality of optical network units (ONUs) are connected to a lowest-level network. A node apparatus connected to networks other than the lowest-level network includes (a) passive optical components to branch optical signals from a higher-level network to a lower-level network, and couple optical signals from the lower-level network to the higher-level network, and (b) optical amplifiers for the optical signals. A node apparatus connected to the lowest-level network includes (a) an optical multiplexer/de-multiplexer to de-multiplex optical signals from the higher-level network, selectively output an optical signal to each ONU, and multiplex wave-length specific optical signals from the ONUs into a multiplexed optical signal, and (b) optical amplifiers for the optical signals. The node apparatuses provide an optical communication path between the higher-level network and the lower-level (or lowest-level) network without converting the optical signals into electrical signals.
摘要翻译： 光波分复用网络具有多层结构，其中多个光网络单元（ONU）连接到最低级网络。 连接到除了最低级网络之外的网络的节点装置包括（a）无源光学部件，以将来自上级网络的光信号分支到较低级网络，以及将来自下级网络的光信号耦合到较高级网络 （b）用于光信号的光放大器。 连接到最低级网络的节点装置包括：（a）用于对来自上级网络的光信号进行解复用的光复用器/去多路复用器，选择性地向每个ONU输出光信号，并且复用波长特定光 从ONU到多路复用光信号的信号，以及（b）用于光信号的光放大器。 节点装置在高级网络和下级（或最低级别）网络之间提供光通信路径，而不将光信号转换成电信号。
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4.发明授权公开(公告)号：US07164861B2
公开(公告)日：2007-01-16
申请号：US09785402
申请日：2001-02-20
申请人： Noboru Takachio , Katsumi Iwatsuki , Hitoshi Obara
发明人： Noboru Takachio , Katsumi Iwatsuki , Hitoshi Obara
IPC分类号： H04J14/00
CPC分类号： H04J14/029 , H04B10/271 , H04B10/272 , H04B10/2755 , H04J14/02 , H04J14/0282 , H04J14/0283 , H04J14/0286 , H04Q11/0062 , H04Q11/0067 , H04Q2011/0086
摘要： An optical wavelength division multiplexing network which can carry out large-capacity access service with a simple constitution is provided. In an optical network comprising a plurality of layers, a highest level network comprises a ring network having a center node and remote nodes; an intermediate level network comprises a ring centered around a node belonging to the higher level network, and a lowest level network comprises a star network centered around an access node which multiplexes traffic from a plurality of ONU, the ONU and the access node being directly joined together by optical fibers; the center node belonging to the highest level network and the ONU establish a direct communication path by using lights of different wavelengths; at nodes provided therebetween, the optical signals are not electrically processed but are amplified, branched, and routed.
摘要翻译： 提供了一种能够以简单的结构进行大容量接入服务的光波分复用网络。 在包括多个层的光网络中，最高级网络包括具有中心节点和远程节点的环网; 中间级网络包括以属于较高级网络的节点为中心的环，最低级网络包括以多路复用来自多个ONU的业务的接入节点为中心的星形网络，所述ONU和接入节点直接相连 一起用光纤; 属于最高级网络的中心节点和ONU通过使用不同波长的光线建立直接通信路径; 在其间设置的节点处，光信号不是电处理的，而是被放大，分支和布线。
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5.发明授权公开(公告)号：US06545780B1
公开(公告)日：2003-04-08
申请号：US09295452
申请日：1999-04-21
申请人： Noboru Takachio , Masafumi Koga , Shoko Ohteru
发明人： Noboru Takachio , Masafumi Koga , Shoko Ohteru
IPC分类号： H04J1402
CPC分类号： H04J14/0224
摘要： By using a combination of a plurality of completely unequally spaced channel allocations, the influence of four wave mixing is mitigated even while it is incompletely unequally spaced channel allocation, and it is possible both to decrease the occupied bandwidth and increase the number of channels. A plurality of completely unequally spacing channel allocations are combined, and the number of channels changes depending on the amount of scattering of an optical fiber and the frequency that there exists zero dispersion wavelengths on a transmission path. The completely unequally spaced channel allocations of N1-channels in a first wavelength region including the zero dispersion wavelength &lgr;0 or the mode zero dispersion wavelength &lgr;A are partitioned, and then in sequence the completely unequally spaced channel allocation of N2-, N3-, . . . , channels is partitioned, and the wavelength interval of N channels is set by combining all or a part thereof (where N1≧N224 . . . >Nj≧Nk−1≧Nk).
摘要翻译： 通过使用多个完全不等间隔的信道分配的组合，即使在信道分配不完全不均匀的情况下也可以减轻四波混频的影响，并且可以减少占用带宽并增加信道数。 多个完全不等间隔的信道分配被组合，并且信道数量根据光纤的散射量和在传输路径上存在零色散波长的频率而改变。 在包括零色散波长lambd0或模式零色散波长lambdA的第一波长区域中N1通道的完全不等间隔的通道分配被划分，然后依次是N 2，N 3，...的完全不等间隔的信道分配。 。 。 分配通道，通过组合其全部或部分（其中N1> = N224 ... Nj> = Nk-1> = Nk）来设置N个通道的波长间隔。
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公开(公告)号：US06359724B1
公开(公告)日：2002-03-19
申请号：US09482165
申请日：2000-01-12
申请人： Yoshitada Katagiri , Shinji Nagaoka , Fumikazu Ohira , Ken-ichi Suzuki , Masamichi Fujiwara , Noboru Takachio
发明人： Yoshitada Katagiri , Shinji Nagaoka , Fumikazu Ohira , Ken-ichi Suzuki , Masamichi Fujiwara , Noboru Takachio
IPC分类号： H01S300
CPC分类号： H01S5/50 , H01S3/06795 , H01S3/083 , H01S3/106 , H01S5/1071 , H01S5/1078
摘要： The present invention provides a light generation method and a light source that are preferable in obtaining a single-mode light having high outputs, a small wavelength spectral bandwidth, and a low intensity noise. A white output from a white-light source and having wavelength components over a wide-band in a wavelength spectrum passes through an isolator and is then filtered by a disc-shaped optical filter. A transmitted light is input to a semiconductor optical amplifier having its polarization plane regulated by a polarization controller. An output from the amplifier passes through an isolator and is then filtered by a disc-shaped optical filter again to generate a single-mode light having a small spectral bandwidth and high outputs. Polarization control by the polarization controller corresponds to control of the polarization plane of a semiconductor laser in the semiconductor optical amplifier so as to obtain a maximum gain from the amplifier. This configuration enables a single-mode light having a small spectral bandwidth and high outputs to be easily generated at an arbitrary wavelength.
摘要翻译： 本发明提供了一种在获得具有高输出，小波长频谱带宽和低强度噪声的单模光时优选的光生成方法和光源。 来自白光源的白色输出并且在波长光谱中在宽带上具有波长分量通过隔离器，然后被盘形滤光器滤波。 透射光被输入到具有由偏振控制器调节的偏振面的半导体光放大器。 来自放大器的输出通过隔离器，然后再次被盘形滤光器滤波，以产生具有小光谱带宽和高输出的单模光。 偏振控制器的极化控制对应于半导体光放大器中的半导体激光器的偏振面的控制，以便从放大器获得最大增益。 该配置使得能够容易地以任意波长产生具有小光谱带宽和高输出的单模光。
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公开(公告)号：US07206510B2
公开(公告)日：2007-04-17
申请号：US10266905
申请日：2002-10-08
申请人： Hiroo Suzuki , Masamichi Fujiwara , Mitsuhiro Teshima , Koji Akimoto , Shingo Kawai , Jun-ichi Kani , Noboru Takachio , Katsumi Iwatsuki
发明人： Hiroo Suzuki , Masamichi Fujiwara , Mitsuhiro Teshima , Koji Akimoto , Shingo Kawai , Jun-ichi Kani , Noboru Takachio , Katsumi Iwatsuki
CPC分类号： H04J14/02
摘要： A first optical fiber transmission path is used to transmit continuous-wave light for upstream signal light from the center node to each of the remote nodes, while a second optical fiber transmission path is used to transmit downstream signal light from the center node to each remote node and to transmit upstream signal light (obtained by modulating continuous-wave light) from each remote node to the center node. In this network, specific wavelength bandwidths are allocated to each remote node for the continuous-wave lights (for upstream signal lights) and the downstream signal lights, and the wavelength bandwidths for the continuous-wave lights (for upstream signal lights) and the downstream signal lights are alternately set.
摘要翻译： 第一光纤传输路径用于将用于上行信号光的连续波光从中心节点传输到每个远程节点，而第二光纤传输路径用于将来自中心节点的下行信号光传输到每个远程节点 并且将从每个远程节点发送的上行信号光（通过调制连续波光获得）发送到中心节点。 在该网络中，针对连续波灯（用于上行信号灯）和下行信号灯以及连续波光（用于上行信号灯）和下游的波长带宽，分配给每个远程节点的特定波长带宽 信号灯交替设定。
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公开(公告)号：US07106970B2
公开(公告)日：2006-09-12
申请号：US11134533
申请日：2005-05-20
CPC分类号： H04B10/2572 , G02F1/0136 , G02F2001/0139 , H04B10/532
摘要： To generate light with the degree of polarization zeroed and the spread of an optical spectrum suppressed even with temporal overlapping between optical pulses each of which is polarized orthogonally to the succeeding pulse, a polarization scrambler includes an optical pulse generator that generates optical pulses with an intensity waveform repetition period T/2 and an electrical field repetition period T in which the same intensity waveform is repeated every repetition period T/2 and in which phase is inverted every repetition period T/2, and an orthogonal polarization delay unit which receives each of the optical pulses, separates the optical pulse into two optical pulses with orthogonal states of polarization, and relatively shifts the temporal position of one of the two optical pulses from that of the other optical pulse by (2n−1)T/4 (n is a natural number) to generate light in which each pulse is polarized orthogonally to a succeeding pulse.
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公开(公告)号：US20050220457A1
公开(公告)日：2005-10-06
申请号：US11134533
申请日：2005-05-20
IPC分类号： G02F1/01 , H04B10/2507 , H04B10/532 , H04B10/04
CPC分类号： H04B10/2572 , G02F1/0136 , G02F2001/0139 , H04B10/532
摘要： To generate light with the degree of polarization zeroed and the spread of an optical spectrum suppressed even with temporal overlapping between optical pulses each of which is polarized orthogonally to the succeeding pulse, a polarization scrambler includes an optical pulse generator that generates optical pulses with an intensity waveform repetiton period T/2 and an electrical field repetition period T in which the same intensity waveform is repeated every repetition period T/2 and in which phase is inverted every repetition period T/2, and an orthogonal polarization delay unit which receives each of the optical pulses, separates the optical pulse into two optical pulses with ortogonal states of polarization, and relatively shifts the temporal position of one of the two optical pulses from that of the other optical pulse by (2n−1)T/4 (n is a natural number) to generate light in which each pulse is polarized orthogonally to a succeeding pulse.
摘要翻译： 为了产生具有归零度的光，并且即使光学脉冲之间的时间重叠也抑制光谱的扩展，每个光脉冲与后续脉冲正交地极化，偏振加扰器包括产生具有强度的光脉冲的光脉冲发生器 波形重复周期T / 2和电场重复周期T，其中每个重复周期T / 2重复相同的强度波形，并且每个重复周期T / 2反相，并且每个重复周期T / 2反相的正交偏振延迟单元 光脉冲将光脉冲分离成具有正交偏振状态的两个光脉冲，并将两个光脉冲之一的时间位置从另一个光脉冲的时间位置相对移位（2n-1）T / 4（n是 自然数）以产生其中每个脉冲与后续脉冲正交极化的光。
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公开(公告)号：US06744546B2
公开(公告)日：2004-06-01
申请号：US10321086
申请日：2002-12-17
IPC分类号： G02F100
CPC分类号： H04B10/505 , G02F1/0327 , G02F1/225 , H04B10/5053 , H04B10/541
摘要： A multilevel light-intensity modulating circuit for suppressing the amplitude distortion regarding intermediate levels, caused by the conversion from a multilevel electric signal to a multilevel modulated optical signal. The circuit comprises a section for distributing an input optical carrier into n-channel optical carriers; n light-intensity modulators for modulating intensities of the optical carriers by using input two-level electric signals; a control section for producing a phase difference between the n-channel two-level modulated optical signals; a control section for assigning a different light intensity to each of the n-channel two-level modulated optical signals; and a section for combining the n-channel two-level modulated optical signals obtained via the control sections, and outputting a 2n-level modulated optical signal. The phase difference and the different light intensity are defined in advance so as to produce the 2n-level modulated optical signal.
摘要翻译： 一种多电平光强调制电路，用于抑制由多电平电信号转换为多电平调制的光信号引起的关于中间电平的幅度失真。 电路包括用于将输入光载波分配到n沟道光载波中的部分; n个光强调制器，用于通过使用输入的两电平电信号来调制光载波的强度; 用于产生n沟道二电平调制光信号之间的相位差的控制部分; 控制部分，用于向每个n沟道二电平调制光信号分配不同的光强度; 以及用于组合经由控制部分获得的n沟道二电平调制光信号并输出2 级调制光信号的部分。 预先定义相位差和不同的光强度，以便产生2nm级的调制光信号。
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