公开(公告)号：US07920793B2

公开(公告)日：2011-04-05

申请号：US10581327

申请日：2005-06-17

申请人： Hiroji Masuda ,  Kenji Sato ,  Yutaka Miyamoto

发明人： Hiroji Masuda ,  Kenji Sato ,  Yutaka Miyamoto

IPC分类号： H04J14/02

CPC分类号： H01S3/302 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/1608 ,  H01S2301/02 ,  H01S2301/04 ,  H04B10/294

摘要： An inline repeater that uses a forward-pumped DRA that can use a pumping light source such as an FBG pumping light source and a fiber laser, which are the most commonly used, and an optical fiber communication system are realized. The optical fiber communication system comprises silica fiber as a gain medium for Raman amplification to amplify a signal light; a pumping light source that emits a pumping light that co-propagates through the silica fiber in the same direction as the signal light; and a multiplexer disposed between the silica fiber and the pumping light source that multiplexes the signal light and the pumping light, with the multiplexer being provided with a means to multiplex the signal light input thereto having a wavelength longer than the zero-dispersion wavelength of the silica fiber and the pumping light emitted from the pumping light source, and the pumping light source being equipped with a means to emit pumping light, with the longest wavelength of the pumping light being shorter than the shortest wavelength of the signal light by a frequency difference on the low-frequency side of 13.7 to 30 THz.

摘要翻译： 实现了使用可以使用最常用的FBG泵浦光源和光纤激光器等泵浦光源的前向泵浦DRA和光纤通信系统的在线中继器。 光纤通信系统包括石英光纤作为用于拉曼放大的增益介质，用于放大信号光; 泵浦光源，其发射与所述信号光沿相同方向共同传播通过所述石英光纤的泵浦光; 以及多路复用器，其布置在二极管光纤和泵浦光源之间，多路复用信号光和泵浦光，多路复用器设置有多路复用输入到其上的信号光，该波长比该波长的零色散波长长 二氧化硅纤维和从泵浦光源发射的泵浦光，并且泵浦光源装备有发射泵浦光的装置，其中泵浦光的最长波长比信号光的最短波长短于频率差 在13.7到30 THz的低频侧。

公开(公告)号：US20080193136A1

公开(公告)日：2008-08-14

申请号：US10581327

申请日：2005-06-17

申请人： Hiroji Masuda ,  Kenji Sato ,  Yutaka Miyamoto

发明人： Hiroji Masuda ,  Kenji Sato ,  Yutaka Miyamoto

IPC分类号： H04J14/02

CPC分类号： H01S3/302 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/06766 ,  H01S3/0677 ,  H01S3/094011 ,  H01S3/0941 ,  H01S3/1608 ,  H01S2301/02 ,  H01S2301/04 ,  H04B10/294

摘要： An inline repeater that uses a forward-pumped DRA that can use a pumping light source such as an FBG pumping light source and a fiber laser, which are the most commonly used, and an optical fiber communication system are realized. The optical fiber communication system comprises silica fiber as a gain medium for Raman amplification to amplify a signal light; a pumping light source that emits a pumping light that co-propagates through the silica fiber in the same direction as the signal light; and a multiplexer disposed between the silica fiber and the pumping light source that multiplexes the signal light and the pumping light, with the multiplexer being provided with a means to multiplex the signal light input thereto having a wavelength longer than the zero-dispersion wavelength of the silica fiber and the pumping light emitted from the pumping light source, and the pumping light source being equipped with a means to emit pumping light, with the longest wavelength of the pumping light being shorter than the shortest wavelength of the signal light by a frequency difference on the low-frequency side of 13.7 to 30 THz.

摘要翻译： 实现了使用可以使用最常用的FBG泵浦光源和光纤激光器等泵浦光源的前向泵浦DRA和光纤通信系统的在线中继器。 光纤通信系统包括石英光纤作为用于拉曼放大的增益介质，用于放大信号光; 泵浦光源，其发射与所述信号光沿相同方向共同传播通过所述石英光纤的泵浦光; 以及多路复用器，其布置在二极管光纤和泵浦光源之间，多路复用信号光和泵浦光，多路复用器设置有多路复用输入到其上的信号光，该波长比该波长的零色散波长长 二氧化硅纤维和从泵浦光源发射的泵浦光，并且泵浦光源装备有发射泵浦光的装置，其中泵浦光的最长波长比信号光的最短波长短于频率差 在13.7到30 THz的低频侧。

公开(公告)号：US07379236B2

公开(公告)日：2008-05-27

申请号：US10552554

申请日：2004-07-05

申请人： Hiroji Masuda ,  Hiroto Kawakami ,  Yutaka Miyamoto

发明人： Hiroji Masuda ,  Hiroto Kawakami ,  Yutaka Miyamoto

IPC分类号： H01S4/00 ,  H04B10/12

CPC分类号： H04B10/291 ,  H04B2210/003

摘要： An optical fiber communication system is provided which uses remote pumping that is capable of improving pumping efficiency and reducing a noise figure. A coupler (20) of a linear repeater (18) couples signal light to pumping light outputted from a pumping light source (19). The outputted signal light and pumping light reach a linear repeater (25) through transmission fibers (22 to 24) and remote pumping modules (27F and 27R). A coupler (30) of the linear repeater (25) couples the signal light to the pumping light supplied from a pumping light source (29), to output the signal light and the pumping light to the transmission fiber (24). The remote pumping module (27F) divides the pumping light propagated in the transmission fiber (22), from the signal light. The remote pumping module 27F branches the divided pumping light in two directions with a predetermined ratio. After branching, each of the branched pumping light is coupled to the signal light to be supplied to both ends of an erbium-doped fiber. The remote pumping module (27R) is similar in structure to the remote pumping module (27F).

摘要翻译： 提供了一种使用能够提高泵送效率并降低噪声系数的远程泵送的光纤通信系统。 线性中继器（18）的耦合器（20）将信号光耦合到从泵浦光源（19）输出的泵浦光。 输出的信号光和泵浦光通过传输光纤（22至24）和远程泵送模块（27F和27R）到达线性中继器（25）。 线性中继器（25）的耦合器（30）将信号光耦合到从泵浦光源（29）提供的泵浦光，以将信号光和泵浦光输出到传输光纤（24）。 远程泵送模块（27F）将在传输光纤（22）中传播的泵浦光与信号光分开。 远程泵送模块27F以预定比例在两个方向上分支分开的泵浦光。 在分支之后，每个分支泵浦光耦合到要提供给掺铒光纤两端的信号光。 远程泵送模块（27R）在结构上类似于远程泵送模块（27F）。

公开(公告)号：US20070003286A1

公开(公告)日：2007-01-04

申请号：US10552554

申请日：2004-07-05

申请人： Hiroji Masuda ,  Hiroto Kawakami ,  Yutaka Miyamoto

发明人： Hiroji Masuda ,  Hiroto Kawakami ,  Yutaka Miyamoto

IPC分类号： H04J14/02

CPC分类号： H04B10/291 ,  H04B2210/003

摘要： An optical fiber communication system is provided which uses remote pumping that is capable of improving pumping efficiency and reducing a noise figure. A coupler (20) of a linear repeater (18) couples signal light to pumping light outputted from a pumping light source (19). The outputted signal light and pumping light reach a linear repeater (25) through transmission fibers (22 to 24) and remote pumping modules (27F and 27R). A coupler (30) of the linear repeater (25) couples the signal light to the pumping light supplied from a pumping light source (29), to output the signal light and the pumping light to the transmission fiber (24). The remote pumping module (27F) divides the pumping light propagated in the transmission fiber (22), from the signal light. The remote pumping module 27F branches the divided pumping light in two directions with a predetermined ratio. After branching, each of the branched pumping light is coupled to the signal light to be supplied to both ends of an erbium-doped fiber. The remote pumping module (27R) is similar in structure to the remote pumping module (27F).

摘要翻译： 提供了一种使用能够提高泵送效率并降低噪声系数的远程泵送的光纤通信系统。 线性中继器（18）的耦合器（20）将信号光耦合到从泵浦光源（19）输出的泵浦光。 输出的信号光和泵浦光通过传输光纤（22至24）和远程泵送模块（27F和27R）到达线性中继器（25）。 线性中继器（25）的耦合器（30）将信号光耦合到从泵浦光源（29）提供的泵浦光，以将信号光和泵浦光输出到传输光纤（24）。 远程泵送模块（27F）将在传输光纤（22）中传播的泵浦光与信号光分开。 远程泵送模块27F以预定比例在两个方向上分支分开的泵浦光。 在分支之后，每个分支泵浦光耦合到要提供给掺铒光纤两端的信号光。 远程泵送模块（27R）在结构上类似于远程泵送模块（27F）。

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。

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。

公开(公告)号：US08488696B2

公开(公告)日：2013-07-16

申请号：US12994365

申请日：2009-06-19

申请人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Eiichi Yamada ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Hideyuki Nosaka

发明人： Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Masato Mizoguchi ,  Akihide Sano ,  Eiichi Yamada ,  Etsushi Yamazaki ,  Yutaka Miyamoto ,  Hideyuki Nosaka

IPC分类号： H04K1/10

CPC分类号： H04B7/084 ,  H04B7/0845 ,  H04L2027/0067

摘要： A receiver device receives a signal inputted to one or a plurality of ports as a plurality of received signals, and includes: a phase offset estimating unit that, on the basis of a unique word of each signal block contained in said received signal, estimates the phase offset, and a phase offset compensating unit that, on the basis of a phase offset estimated by said phase offset estimating unit, compensates the phase offset; the receiver device uses a known signal component (unique word) contained in a frequency-domain equalized signal to compensate the phase offset, whereby it compensates complex phase offset fluctuation, and estimates the phase offset of a signal obtained at each port.

摘要翻译： 接收机装置接收输入到一个或多个端口的信号作为多个接收信号，并且包括：相位偏移估计单元，其基于包含在所述接收信号中的每个信号块的唯一字，估计出 以及相位偏移补偿单元，其基于由所述相位偏移估计单元估计的相位偏移补偿相位偏移; 接收机设备使用包含在频域均衡信号中的已知信号分量（唯一字）来补偿相位偏移，从而补偿复相位偏移波动，并且估计在每个端口处获得的信号的相位偏移。

公开(公告)号：US20120315043A1

公开(公告)日：2012-12-13

申请号：US13576902

申请日：2011-02-03

申请人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

发明人： Tadao Nakagawa ,  Etsushi Yamazaki ,  Koichi Ishihara ,  Takayuki Kobayashi ,  Riichi Kudo ,  Yasushi Takatori ,  Munehiro Matsui ,  Yutaka Miyamoto ,  Akihide Sano ,  Eiji Yoshida ,  Masato Mizoguchi

IPC分类号： H04J14/06

CPC分类号： H04B10/5053 ,  G02F1/0136 ,  H04B10/532 ,  H04B10/60 ,  H04J14/06

摘要： A polarization state of a transmission signal can be changed at a high speed based on a symbol-rate By switching a first switch, a second switch, and a third switch with time, one of an X-polarized wave_I-signal as a Y-polarized wave_I-signal, a signal caused by performing logical inversion for an X-polarized wave_I-signal, an X-polarized wave_Q-signal and a signal caused by logical inversion for an X-polarized wave_Q-signal is input to a second modulator. Further, by switching the first switch, the second switch and the third switch with time, the second modulator is input one of the X-polarized wave_I-signal as the Y-polarized wave_Q-signal, the X-polarized wave_I-signal, the signal caused by performing logical inversion for the X-polarized wave_I-signal, the X-polarized wave_Q-signal and the signal caused by performing logical inversion for the X-polarized wave_Q-signal. Thereby, a polarization state of a transmission signal can be changed at high speed based on a symbol-rate speed.

摘要翻译： 传输信号的极化状态可以基于符号速率高速度地改变。通过随时间切换第一开关，第二开关和第三开关，X极化波I_信号之一作为Y轴， 通过对X偏振波_I信号执行逻辑反相，X偏振波Q_信号和由X偏振波Q_信号的逻辑反相引起的信号引起的信号被输入到第二调制器。 此外，通过随时间切换第一开关，第二开关和第三开关，第二调制器输入X极化波I_信号之一作为Y偏振波Q_信号，X偏振波I信号， 通过对X偏振波_I信号进行逻辑反转而引起的信号，X偏振波Q信号和由X偏振波Q信号执行逻辑反相引起的信号。 因此，可以基于符号速率速度高速地改变发送信号的偏振状态。

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。

公开(公告)号：US20110002689A1

公开(公告)日：2011-01-06

申请号：US12865827

申请日：2009-02-20

申请人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

发明人： Akihide Sano ,  Eiichi Yamada ,  Takayuki Kobayashi ,  Koichi Ishihara ,  Yutaka Miyamoto ,  Riichi Kudo

IPC分类号： H04J14/04 ,  H04B10/06 ,  H04J14/06

CPC分类号： H04B10/69 ,  H04L25/0305 ,  H04L25/03159 ,  H04L27/2647 ,  H04L27/2697

摘要： A high-performance optical OFDM receiver is realized. A subcarrier separation circuit receives an optical OFDM signal consisting of two subcarriers A and B and separates a subcarrier component, signal light and first local oscillator light are input to the subcarrier separation circuit, the subcarrier separation circuit converts the signal light and the first local oscillator into a baseband electrical signal, the subcarrier separation circuit converts the baseband electrical signal into a digital signal, the subcarrier separation circuit shifts the frequency of the converted digital signal so that a center frequency of the subcarrier A becomes zero, and the subcarrier separation circuit adds a frequency shifted signal to a signal obtained by delaying the frequency shifted signal by ½ of a symbol time to separate a component of the subcarrier A.

摘要翻译： 实现了高性能的光OFDM接收机。 子载波分离电路接收由两个子载波A和B组成的光OFDM信号，并将子载波分量，信号光和第一本地振荡光分别输入到子载波分离电路，子载波分离电路将信号光和第一本机振荡器 子载波分离电路将基带电信号转换为数字信号，副载波分离电路将转换的数字信号的频率移位，使副载波A的中心频率为零，副载波分离电路相加 频移信号到通过将频移信号延迟1/2符号时间的1/2来获得的信号，以分离副载波A的分量。