-
1.发明授权公开(公告)号：US07155127B2
公开(公告)日：2006-12-26
申请号：US10218721
申请日：2002-08-14
IPC分类号： H04J14/00
CPC分类号： H04J14/0226 , H04B10/40 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282
摘要： Cost-reduction in an optical communication unit is achieved by using spectrum-sliced modulated broadband light for transmitting upstream signals, instead of using laser light. An optical communication system includes at least one pair of optical communication units that each has a bi-directional network interface in which physical bit rates of transmission signals and reception signals are identical, an optical transmitter, and an optical receiver, and that performs bi-directional transmissions via at least one optical fiber. One optical communication unit includes a physical bit rate down-converter that lowers the physical bit rate of transmission signals from the bi-directional network interface and outputs to the optical transmitter, and the other optical communication unit includes a physical bit rate up-converter that raises the physical bit rate of signals received by the optical receiver and outputs to the bi-directional network interface. These optical communication units are also applicable to wavelength-division multiplexing systems.
-
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。
-
公开(公告)号：US07127168B2
公开(公告)日：2006-10-24
申请号：US10163849
申请日：2002-06-05
申请人： Jun-ichi Kani , Katsuhiro Araya , Noboru Takachio , Koji Akimoto , Mitsuhiro Teshima , Masamichi Fujiwara , Hiroo Suzuki , Shingo Kawai , Katsumi Iwatsuki
发明人： Jun-ichi Kani , Katsuhiro Araya , Noboru Takachio , Koji Akimoto , Mitsuhiro Teshima , Masamichi Fujiwara , Hiroo Suzuki , Shingo Kawai , Katsumi Iwatsuki
IPC分类号： H04B10/00
CPC分类号： H04J14/02 , H04B10/506 , H04J14/0221 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04J14/0297
摘要： Multi-wavelength light having a frequency band equal to or greater than the FSR of an AWG is demultiplexed into individual wavelength channels, and power level deviations between wavelength channels are suppressed. An optical demultiplexer includes a wavelength-group demultiplexer that demultiplexes multi-wavelength light into wavelength groups formed from wavelength channels, and channel demultiplexers that demultiplex each wavelength group into wavelength channels light. An optical multiplexer includes channel multiplexers that multiplex modulated signal light of each wavelength channel for each wavelength group, and a wavelength-group multiplexer that multiplexes, for each wavelength group, WDM signal light output from the channel multiplexers. The FSR of the wavelength-group multiplexer/demultiplexer is set to be equal to or greater than the frequency band of the multi-wavelength light. The channel multiplexer/demultiplexer is an AWG in which the FSR is approximately the full width at half maximum of the transmission characteristics of each port of the wavelength-group multiplexer/demultiplexer.
-
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。
-
公开(公告)号：US07555215B2
公开(公告)日：2009-06-30
申请号：US10535526
申请日：2004-05-28
申请人： Hirotaka Nakamura , Junichi Kani , Hiroo Suzuki , Mitsuhiro Teshima , Ukyo Yamaguchi , Hidetaka Onishi , Katsumi Iwatsuki
发明人： Hirotaka Nakamura , Junichi Kani , Hiroo Suzuki , Mitsuhiro Teshima , Ukyo Yamaguchi , Hidetaka Onishi , Katsumi Iwatsuki
CPC分类号： H04J14/0294 , H04J14/0226 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/028 , H04J14/0282 , H04J14/0283
摘要： A dual structure for a multiplexing section extended to an OSU is obtained without adding a dynamic function, such as an optical switch, to a W-MULDEM. The W-MULDEM of an optical wavelength division multiplexing access system divides, among ports corresponding to the individual ONUs, downstream optical signals having wavelengths λd1 to λdn, which are received along a current-use optical fiber, or downstream optical signals having wavelengths λd1+Δλ to λdn+Δλ, which are received along a redundant optical fiber. The W-MULDEM also multiplexes, for the port that corresponds to the current-use optical fiber or the redundant optical fiber, upstream optical signals having wavelengths λu1 to λun or wavelengths λu1+Δλ to λun+Δλ, which are received along optical fibers corresponding to the ONUs. A wavelength difference between the downstream optical signal and the upstream optical signal that are consonant with each ONU is defined as an integer times the FSR of an AWG.
摘要翻译： 获得扩展到OSU的复用部分的双重结构，而不向诸如光开关的动态功能添加到W-MULDEM。 光波分复用接入系统的W-MULDEM在对应于各个ONU的端口中，沿着当前使用的光纤接收波长为lambdad1至lambdadn的下行光信号，或者具有波长lambdad1 + Deltalambda到lambdadn + Deltalambda，沿冗余光纤接收。 对于与当前使用的光纤或冗余光纤对应的端口，W-MULDEM还将具有波长lambdau1至lambdaun或波长lambdau1 + Deltalambda的上行光信号复用到λun+ Deltalambda，沿着光纤对应接收 到ONU。 与每个ONU相关联的下行光信号和上行光信号之间的波长差定义为AWG的FSR的整数倍。
-
公开(公告)号：US07076166B2
公开(公告)日：2006-07-11
申请号：US10212389
申请日：2002-08-05
申请人： Masaru Fuse , Toru Shiozaki , Yoshikazu Ishii , Hiroaki Asano , Kuniaki Utsumi , Katsumi Iwatsuki , Hitoshi Uematsu , Shigeru Kuwano , Mitsuhiro Teshima
发明人： Masaru Fuse , Toru Shiozaki , Yoshikazu Ishii , Hiroaki Asano , Kuniaki Utsumi , Katsumi Iwatsuki , Hitoshi Uematsu , Shigeru Kuwano , Mitsuhiro Teshima
IPC分类号： H04J14/00
CPC分类号： H04J14/0227 , H04J14/0226 , H04J14/0241 , H04J14/0246 , H04J14/025 , H04J14/0282 , H04L7/0008 , H04L7/0075
摘要： This invention discloses an optical burst transmission system in which an optical generator generates Type 1 lightwaves having different wavelengths corresponding to transmission lines and having undergone intensity modulation with obtained data; a broad spectrum optical generator generates, by incorporating Type 2 lightwaves, a Type 3 lightwave using a fewer light emitting devices than the number of the Type 1 lightwaves, each Type 2 lightwaves having a corresponding wavelength apart from Type 1 lightwave's wavelength with an FSR interval and having undergone the intensity modulation with clock signals; an optical multiplexer multiplexes the Type 1 and Type 3 lightwaves to output the combination to each transmission line; and an optical routing unit extracts, from the combination, pairs of one Type 1 lightwave and one Type 2 lightwave having the corresponding wavelength, and guides pairs to each transmission line corresponding to the Type 1 lightwave's wavelength in each pair.
-
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。
-
公开(公告)号：US07031614B2
公开(公告)日：2006-04-18
申请号：US11132937
申请日：2005-05-19
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。
-
公开(公告)号：US06959152B2
公开(公告)日：2005-10-25
申请号：US10370888
申请日：2003-02-20
IPC分类号： G02F1/01 , H04B10/2507 , H04B10/532 , H04J14/00 , H04B10/00 , H04B10/12
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.
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对相位进行反相;以及正交偏振延迟单元， 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是 自然数）以产生其中每个脉冲与后续脉冲正交极化的光。
-
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.
-
-
-
-
-
-
-
-
-
搜索结果
19 条记录 (耗时 0.037 秒)
