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公开(公告)号：US07542631B2
公开(公告)日：2009-06-02
申请号：US12081733
申请日：2008-04-21
CPC分类号： H04B10/5167 , H04B10/505 , H04B10/5055
摘要： An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal (10) for accepting an electrical binary signal, an amplifier (12) for amplifying said electrical binary signal to the level requested for operating an electrical-optical converter (16) such as a Mach Zehnder light modulator, a bandwidth restriction means (14) which is for instance a low pass filter for restricting bandwidth of said electrical binary signal, and an electrical-optical conversion means (16) such as a Mach Zehnder light modulator for converting electrical signal to optical signal. Because of the location of the low pass filter (14) between an output of the amplifier (12) and the Mach Zehnder light modulator (16), the amplifier (12) may operate in saturation region to provide high level output signal enough for operating the Mach Zehnder light modulator, and a signal shaped by the low pass filter (14) is applied to the Mach Zehnder light modulator (16) with excellent waveform. The invention is useful for long distance, large capacity and low cost optical transmission system.
摘要翻译： 提供带宽限制光信号的光传输系统包括用于接受电二进制信号的输入端（10），用于将所述电二进制信号放大到用于操作电 - 光转换器（16）所请求的电平的放大器（12） 作为马赫曾德尔光调制器，带宽限制装置（14），例如用于限制所述电二进制信号的带宽的低通滤波器，以及诸如马赫曾德尔光调制器的电 - 光转换装置（16），用于转换 电信号到光信号。 由于放大器（12）的输出端与马赫曾德尔光调制器（16）之间的低通滤波器（14）的位置，放大器（12）可以在饱和区域中工作，以提供足够的高电平输出信号 马赫曾德尔光调制器和由低通滤波器（14）成形的信号以优异的波形施加到马赫曾德尔光调制器（16）。 本发明对于长距离，大容量和低成本的光传输系统是有用的。
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2.发明授权Optical transmission method, optical transmitter, optical receiver, and optical transmission system 有权光传输方式，光发射机，光接收机和光传输系统公开(公告)号：US06865348B2
公开(公告)日：2005-03-08
申请号：US09793954
申请日：2001-02-28
申请人： Yutaka Miyamoto , Akira Hirano , Kazushige Yonenaga , Kenji Sato , Hiromu Toba , Akihiko Matsuura
发明人： Yutaka Miyamoto , Akira Hirano , Kazushige Yonenaga , Kenji Sato , Hiromu Toba , Akihiko Matsuura
IPC分类号： H04B10/50 , H04B10/508 , H04B10/04 , H04B10/12
CPC分类号： H04B10/5055 , H04B10/505 , H04B10/5051 , H04B10/508
摘要： A system which improves wavelength tolerance, compensates dispersion in a simple way, reduces limitation of the fiber input power is disclosed. The operation includes receiving a clock signal from a system clock source; modulating a single mode optical signal based on the clock signal and generating an optical pulse signal having two longitudinal modes, the frequency interval thereof being n×B, n being a natural number and B being a transmission speed; generating a partial response signal by converting a binary NRZ signal from a digital signal source in synchronism with the system clock source; and modulating the optical pulse signal based on the partial response signal, and outputting a binary RZ modulated signal. The binary RZ modulated signal is input into a receiver, where two partial response components in the optical spectra of the input signal are divided, and one or both of the components are received.
摘要翻译： 提高波长公差的系统以简单的方式补偿色散，减少了光纤输入功率的限制。 该操作包括从系统时钟源接收时钟信号; 基于时钟信号调制单模光信号并产生具有两个纵模的光脉冲信号，其频率间隔为n×B，n为自然数，B为传输速度; 通过与系统时钟源同步地从数字信号源转换二进制NRZ信号来产生部分响应信号; 并根据部分响应信号调制光脉冲信号，并输出二进制RZ调制信号。 二进制RZ调制信号被输入到接收机中，其中输入信号的光谱中的两个部分响应分量被分割，并且接收一个或两个分量。
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公开(公告)号：US07536112B2
公开(公告)日：2009-05-19
申请号：US09939716
申请日：2001-08-28
IPC分类号： H04B10/04
CPC分类号： H04B10/5167 , H04B10/505 , H04B10/5055
摘要： An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal (10) for accepting an electrical binary signal, an amplifier (12) for amplifying said electrical binary signal to the level requested for operating an electrical-optical converter (16) such as a Mach Zehnder light modulator, a bandwidth restriction means (14) which is for instance a low pass filter for restricting bandwidth of said electrical binary signal, and an electrical-optical conversion means (16) such as a Mach Zehnder light modulator for converting electrical signal to optical signal. Because of the location of the low pass filter (14) between an output of the amplifier (12) and the Mach Zehnder light modulator (16), the amplifier (12) may operate in saturation region to provide high level output signal enough for operating the Mach Zehnder light modulator, and a signal shaped by the low pass filter (14) is applied to the Mach Zehnder light modulator (16) with excellent waveform. The invention is useful for long distance, large capacity and low cost optical transmission system.
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公开(公告)号：US20080205903A1
公开(公告)日：2008-08-28
申请号：US12081733
申请日：2008-04-21
IPC分类号： H04B10/04
CPC分类号： H04B10/5167 , H04B10/505 , H04B10/5055
摘要： An optical transmission system which provides bandwidth restricted optical signal comprises an input terminal (10) for accepting an electrical binary signal, an amplifier (12) for amplifying said electrical binary signal to the level requested for operating an electrical-optical converter (16) such as a Mach Zehnder light modulator, a bandwidth restriction means (14) which is for instance a low pass filter for restricting bandwidth of said electrical binary signal, and an electrical-optical conversion means (16) such as a Mach Zehnder light modulator for converting electrical signal to optical signal. Because of the location of the low pass filter (14) between an output of the amplifier (12) and the Mach Zehnder light modulator (16), the amplifier (12) may operate in saturation region to provide high level output signal enough for operating the Mach Zehnder light modulator, and a signal shaped by the low pass filter (14) is applied to the Mach Zehnder light modulator (16) with excellent waveform. The invention is useful for long distance, large capacity and low cost optical transmission system.
摘要翻译： 提供带宽限制光信号的光传输系统包括用于接受电二进制信号的输入端（10），用于将所述电二进制信号放大到用于操作电 - 光转换器（16）所请求的电平的放大器（12） 作为马赫曾德尔光调制器，带宽限制装置（14），例如用于限制所述电二进制信号的带宽的低通滤波器，以及诸如马赫曾德尔光调制器的电 - 光转换装置（16），用于转换 电信号到光信号。 由于放大器（12）的输出端与马赫曾德尔光调制器（16）之间的低通滤波器（14）的位置，放大器（12）可以在饱和区域中工作，以提供足够的高电平输出信号 马赫曾德尔光调制器和由低通滤波器（14）成形的信号以优异的波形施加到马赫曾德尔光调制器（16）。 本发明对于长距离，大容量和低成本的光传输系统是有用的。
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5.发明授权Optical transmitter and optical transmitter control method using variable duty ratio setting and alternate phase inversion for optical clock pulses 失效光发射机和光发射机控制方法，使用可变占空比设置和光时钟脉冲的交替相位反转公开(公告)号：US06763197B1
公开(公告)日：2004-07-13
申请号：US09588412
申请日：2000-06-06
申请人： Akira Hirano , Kazushige Yonenaga , Yutaka Miyamoto , Kenji Sato , Masaki Asobe
发明人： Akira Hirano , Kazushige Yonenaga , Yutaka Miyamoto , Kenji Sato , Masaki Asobe
IPC分类号： H04B1004
CPC分类号： H04L7/0075 , H04J14/08 , H04L25/4906
摘要： An optical transmitter for realizing a high tolerance with respect to the group velocity dispersion of the optical fibers, a small receiver sensitivity degradation, and an improved stability that is hardly affected by the group velocity dispersion even in the case of network scale expansion, is constructed by a light source section for generating optical clock pulses synchronized with a signal bit rate while maintaining a duty ratio of the optical clock pulses constant, which is capable of variably setting the duty ratio, and an encoding section for encoding the optical clock pulses by using electric signals synchronized with the optical clock pulses while setting a relative optical phase difference between the optical clock pulses in adjacent time-slots to be an odd integer multiple of &pgr;.
摘要翻译： 构造光传输器，即使在网络规模扩展的情况下，也能够实现相对于光纤的群速度色散的高容差，小的接收机灵敏度劣化，几乎不受群速分散影响的改善的稳定性 通过光源部分，用于产生与信号比特率同步的光时钟脉冲，同时保持能够可变地设置占空比的光时钟脉冲的占空比恒定;以及编码部分，用于通过使用 电信号与光时钟脉冲同步，同时将相邻时隙中的光时钟脉冲之间的相对光相位差设置为pi的奇整数倍。
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6.发明授权Precoding circuit and precoding-mulitplexing circuit for realizing very high transmission rate in optical fiber communication 有权用于在光纤通信中实现非常高的传输速率的预编码电路和预编码多路复用电路公开(公告)号：US06934308B1
公开(公告)日：2005-08-23
申请号：US09496974
申请日：2000-02-02
CPC分类号： H04L25/497
摘要： A precoding-multiplexing circuit is formed by a precoding circuit for carrying out a precoding with respect to n sets of parallel input binary data signals having a bit rate equal to R/n, to obtain n sets of parallel precoded signals, and a time division multiplexer for time division multiplexing the parallel precoded signals obtained by the precoding circuit, in units of one bit, and outputting time division multiplexed output signal having a bit rate equal to R. In this configuration, the encoding is realized by processing electric signals before the time division multiplexing, so that it becomes possible for the preceding circuit to handle signals which are slower than the transmission rate, and therefore it becomes easier to realize the higher transmission rate.
摘要翻译： 预编码复用电路由预编码电路形成，用于对具有等于R / n的比特率的n组并行输入二进制数据信号进行预编码，以获得n组并行预编码信号，以及时分 多路复用器，用于以一位为单位时分复用由预编码电路获得的并行预编码信号，并输出比特率等于R的时分复用输出信号。在该配置中，通过在 时分复用，使得前一电路可以处理比传输速率慢的信号，因此变得更容易实现更高的传输速率。
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公开(公告)号：US07995930B2
公开(公告)日：2011-08-09
申请号：US12092031
申请日：2006-05-19
申请人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
发明人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
IPC分类号： H04B10/06
CPC分类号： H04L27/2071 , G02F1/0327 , H04B10/677 , H04L27/223
摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control. A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.
摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。
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公开(公告)号：US20090097867A1
公开(公告)日：2009-04-16
申请号：US12092031
申请日：2006-05-19
申请人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
发明人： Mikio Yoneyama , Fumiaki Saitou , Shigeru Ono , Yosuke Takeuchi , Kazushige Yonenaga , Shoichiro Kuwahara , Eiji Yoshida , Yutaka Miyamoto , Hiroto Kawakami
IPC分类号： H04B10/06
CPC分类号： H04L27/2071 , G02F1/0327 , H04B10/677 , H04L27/223
摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control.A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.
摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。
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公开(公告)号：US06559996B1
公开(公告)日：2003-05-06
申请号：US09362310
申请日：1999-07-28
IPC分类号： H04B1004
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/5055 , H04B10/50572 , H04B10/50575 , H04B10/508 , H04B10/5162 , H04B10/5165
摘要： The present invention relates to an optical transmission system which reduces optical signal bandwidth with return-to-zero (RZ) signal.
摘要翻译： 光传输系统技术领域本发明涉及一种利用归零（RZ）信号降低光信号带宽的光传输系统。
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10.发明授权公开(公告)号：US08005374B2
公开(公告)日：2011-08-23
申请号：US12723210
申请日：2010-03-12
申请人： Kazushige Yonenaga , Mikio Yoneyama , Masahito Tomizawa , Akira Hirano , Shoichiro Kuwahara , Tomoyoshi Kataoka , Akihide Sano , Gentaro Funatsu
发明人： Kazushige Yonenaga , Mikio Yoneyama , Masahito Tomizawa , Akira Hirano , Shoichiro Kuwahara , Tomoyoshi Kataoka , Akihide Sano , Gentaro Funatsu
IPC分类号： H04B10/06
CPC分类号： H04B10/58 , H04B10/5051 , H04B10/5055 , H04B10/50575 , H04B10/54 , H04B10/66
摘要： An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.
摘要翻译： 提供了一种光传输系统，其中可以设置与发射侧的光源的光频率相匹配的马赫 - 曾德干涉仪的最佳工作点。 光接收器（2）具有无穷小调制信号分量检测电路（222），其使用从平衡检测电路（221）输出的信号串来检测施加到相位调整端子（201）的无穷小调制信号分量， 通过无穷小调制信号振荡电路（224）的MZI（200）; 同步检测电路（223），其同步地检测从无穷小调制信号分量检测电路（222）和无穷小调制信号振荡电路（224）输出的无穷小调制信号，并检测由第二调制信号分量检测电路 MZI（200）的光信号载波频率和光频特性; 以及控制器（207），其输出控制信号以调整从MZI（200）输出的两个分离光信号之间的相位差，以校正偏移量。
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