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91. 发明申请

US20120177383A1 OPTICAL RECEIVER AND OPTICAL TRANSMISSION SYSTEM 有权
标题翻译：光接收机和光传输系统
公开(公告)号：US20120177383A1
公开(公告)日：2012-07-12
申请号：US13324639
申请日：2011-12-13
申请人： Takahito TANIMURA , Takeshi Hoshida
发明人： Takahito TANIMURA , Takeshi Hoshida
IPC分类号： H04B10/06 , H04B10/00
CPC分类号： H04B10/61
摘要： An optical receiver includes: a first generator to generate, from an optical signal to which a reference signal is inserted, a first digital signal representing a signal component of a first partial band including the reference signal, using a first local oscillation light of a first frequency; a second generator to generate, from the optical signal, a second digital signal representing a signal component of a second partial band including the reference signal, using a second local oscillation light of a second frequency being different from the first frequency; a frequency compensator to adjust a frequency of the signal component of the first partial band and a frequency of the signal component of the second partial band according to a frequency of the reference signal; and a combiner to combine the first and second partial bands adjusted by the frequency compensator.
摘要翻译：一种光接收机，包括：第一发生器，用于从第一数字信号中产生参考信号，第一数字信号表示包含参考信号的第一部分频带的信号分量，使用第一本地振荡光频率; 第二发生器，使用与所述第一频率不同的第二频率的第二本地振荡光，从所述光信号产生表示包括所述参考信号的第二部分频带的信号分量的第二数字信号; 频率补偿器，用于根据参考信号的频率调整第一部分频带的信号分量的频率和第二部分频带的信号分量的频率; 以及组合器，以组合由频率补偿器调整的第一和第二部分频带。

92. 发明授权

US08086113B2 Optical receiver 有权
标题翻译：光接收机
公开(公告)号：US08086113B2
公开(公告)日：2011-12-27
申请号：US12104056
申请日：2008-04-16
申请人： Hisao Nakashima , Takeshi Hoshida , Takahito Tanimura
发明人： Hisao Nakashima , Takeshi Hoshida , Takahito Tanimura
IPC分类号： H04B10/00
CPC分类号： H04B10/611 , H04B10/60 , H04B10/6165
摘要： An optical mixing part mixing a received optical signal and local oscillator light in at least two kinds of phases and extracting at least two-system optical signals corresponding to each light phase; a photoelectric conversion part converting the at least two-system optical signals obtained in the optical mixing part into electric analog signals; an analog-to-digital conversion part converting the electric analog signals into digital signals; and a control part processing the digital signals thereby detecting a light phase difference between the respective systems in the optical mixing part and supplying a signal for correcting the light phase between the systems to the optical mixing part to control the optical mixing part so that the light phase difference becomes to zero or close to a desired value when the light phase difference has a shift from the desired value.
摘要翻译：一种光混合部分，将接收的光信号和至少两相的本地振荡光混合，并提取与每个光相对应的至少两系统的光信号; 将所述光混合部中获得的所述至少两系统的光信号转换成电模拟信号的光电转换部; 模拟数字转换部分将电模拟信号转换为数字信号; 以及控制部分处理数字信号，从而检测光混合部分中的各个系统之间的光相位差，并将用于校正系统之间的光相位的信号提供给光学混合部分，以控制光学混合部分，使得光当光相位差从期望值偏移时，相位差变为零或接近期望值。

93. 发明授权

US07817923B2 Optical transmitting apparatus, optical receiving apparatus, and optical communication system comprising them 有权
标题翻译：光发送装置，光接收装置和包括它们的光通信系统
公开(公告)号：US07817923B2
公开(公告)日：2010-10-19
申请号：US11275420
申请日：2005-12-30
申请人： Yuichi Akiyama , Takeshi Hoshida , Yutaka Kai , Hiroki Ooi , Kentaro Nakamura , Naoki Kuwata , Yoshinori Nishizawa , Tomoo Takahara , Masahiro Yuki
发明人： Yuichi Akiyama , Takeshi Hoshida , Yutaka Kai , Hiroki Ooi , Kentaro Nakamura , Naoki Kuwata , Yoshinori Nishizawa , Tomoo Takahara , Masahiro Yuki
IPC分类号： H04B10/04
CPC分类号： G02F1/2255 , G02F1/0123 , H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/50575 , H04B10/50577 , H04B10/50595 , H04B10/5162 , H04B10/5165 , H04B10/5561 , H04B10/66 , H04B10/677
摘要： A phase shift unit provides a prescribed phase difference (π/2, for example) between a pair of optical signals transmitted via a pair of arms constituting a data modulation unit. A low-frequency signal f0 is superimposed on one of the optical signals. A signal of which phase is shifted by π/2 from the low-frequency signal f0 is superimposed on the other optical signal. A pair of the optical signals is coupled, and a part of which is converted into an electrical signal by a photodiode. 2f0 component contained in the electrical signal is extracted. Bias voltage provided to the phase shift unit is controlled by feedback control so that the 2f0 component becomes the minimum.
摘要翻译：相移单元在经由构成数据调制单元的一对臂发送的一对光信号之间提供规定的相位差（＆pgr / / 2）。低频信号f0叠加在一个光信号上。将相位从低频信号f0移位了＆pgr / / 2的信号叠加在另一个光信号上。一对光信号被耦合，其一部分由光电二极管转换成电信号。提取包含在电信号中的2f0分量。通过反馈控制来控制提供给相移单元的偏压，使得2f0分量成为最小值。

94. 发明授权

US07792436B2 Optical receiver corresponding to differential M-phase shift keying system 有权
标题翻译：对应于差分M相移键控系统的光接收机
公开(公告)号：US07792436B2
公开(公告)日：2010-09-07
申请号：US11391414
申请日：2006-03-29
申请人： Takeshi Hoshida , Nobuhiro Fukushima
发明人： Takeshi Hoshida , Nobuhiro Fukushima
IPC分类号： H04B10/06
CPC分类号： H04L27/22 , H04B10/60
摘要： A small size and low cost optical receiving apparatus, which can stably demodulate the signal, lights in accordance with the differential M-phase shift keying (DMPSK) system. An optical receiving apparatus comprises a light branching unit for branching the differential M-phase shift keying signal beam into four signal light beams, a delay adjusting unit giving a delay time difference of one symbol between a first signal light beam and a second signal light beam and between a third signal light beam and a fourth signal light beam, a demodulating unit for outputting a least two demodulated light signals through respective interferences between the first signal light beam and the second signal light beam, and between the third signal light beam and the fourth signal light beam on one plane which is not parallel to any signal light beam, and at least two optical detectors for converting at least two light signals into electrical signals.
摘要翻译：可以稳定地解调信号的小尺寸和低成本的光接收装置根据差分M相移键控（DMPSK）系统点亮。光接收装置包括用于将差分M相移键控信号光束分支为四个信号光束的光分支单元，延迟调整单元，其给出第一信号光束和第二信号光束之间的一个符号的延迟时间差并且在第三信号光束和第四信号光束之间，解调单元，用于通过第一信号光束和第二信号光束之间的相应干扰以及第三信号光束和第二信号光束之间的相应干扰输出至少两个解调光信号; 在不平行于任何信号光束的一个平面上的第四信号光束，以及用于将至少两个光信号转换为电信号的至少两个光学检测器。

95. 发明申请

US20100189437A1 Optical receiver and optical reception method compatible with differential quadrature phase shift keying 有权
标题翻译：光接收机和光接收方法兼容差分正交相移键控
公开(公告)号：US20100189437A1
公开(公告)日：2010-07-29
申请号：US12382621
申请日：2009-03-19
申请人： Takeshi Hoshida
发明人： Takeshi Hoshida
IPC分类号： H04J14/06
CPC分类号： H04B10/61 , H04B10/532
摘要： In an optical receiver according to the present invention, an input signal light subjected to the differential quadrature phase shift keying (DQPSK) is incident on a PANDA type fiber in a linearly polarized state by 45°, so that a delay time difference corresponding to one symbol is generated between orthogonal polarization components in the DQPSK signal light, and then, the signal light is branched by a half mirror into two, to be sent to first and second paths respectively, thereby giving, by a ¼ wave plate disposed on one of the paths, a relative birefringent amount difference of π/2 between the lights propagated through the respective paths. Then, each of the lights propagated through the first and second paths is separated into two orthogonal polarization components by a polarization beam splitter, and the respective polarization components are received by a differential reception circuit so that in-phase components and quadrature components in the DQPSK signal are demodulated. Thus, a small sized and low cost optical receiver capable of stably demodulating the DQPSK signal is provided.
摘要翻译：在根据本发明的光接收机中，经受差分正交相移键控（DQPSK）的输入信号光以线性偏振态入射到PANDA型光纤45°，使得对应于一个的延迟时间差在DQPSK信号光中的正交偏振分量之间产生符号，然后，信号光被半反射镜分支为两个，分别发送到第一和第二路径，从而通过设置在第一和第二路径之一上的1/4波片路径，通过各个路径传播的光之间的相对双折射量差为＆pgr / / 2。然后，通过第一和第二路径传播的每个光被偏振分束器分离成两个正交偏振分量，并且各个偏振分量由差分接收电路接收，使得DQPSK中的同相分量和正交分量信号被解调。因此，提供能够稳定地解调DQPSK信号的小尺寸和低成本的光接收机。

96. 发明授权

US07751721B2 Optical DQPSK receiver apparatus 有权
标题翻译：光DQPSK接收机
公开(公告)号：US07751721B2
公开(公告)日：2010-07-06
申请号：US11392754
申请日：2006-03-30
申请人： Takeshi Hoshida , Kazuo Hironishi
发明人： Takeshi Hoshida , Kazuo Hironishi
IPC分类号： H04B10/00
CPC分类号： H04B10/66
摘要： A first interferometer comprises a first delay element and a first phase shift element, and a second interferometer comprises a second delay element and a second phase shift element. The amounts of phase shift in the first and second phase shift element are zero and π/2, respectively. A first photo detector comprises first and second photodiodes connected in parallel, and a second photo detector comprises third and fourth photodiodes connected in series. The first photodiode is provided with a first optical output of the first interferometer, the second photodiode is provided with a first optical output of the second interferometer, the third photodiode is provided with a second optical output of the first interferometer, and the fourth photodiode is provided with a second optical output of the second interferometer. A signal process circuit recovers transmitted data based on output signals of the first and second photo detectors.
摘要翻译：第一干涉仪包括第一延迟元件和第一相移元件，第二干涉仪包括第二延迟元件和第二相移元件。第一和第二相移元件中的相移量分别为零和＆lt; pgr / 2。第一光电检测器包括并联连接的第一和第二光电二极管，第二光电检测器包括串联连接的第三和第四光电二极管。第一光电二极管设置有第一干涉仪的第一光输出，第二光电二极管设置有第二干涉仪的第一光输出，第三光电二极管设置有第一干涉仪的第二光输出，第四光电二极管为设置有第二干涉仪的第二光输出。信号处理电路基于第一和第二光电检测器的输出信号来恢复发送的数据。

97. 发明授权

US07680419B2 Repeater and repeating method 有权
标题翻译：中继器和重复方法
公开(公告)号：US07680419B2
公开(公告)日：2010-03-16
申请号：US11445148
申请日：2006-06-02
申请人： Hisao Nakashima , Takeshi Hoshida
发明人： Hisao Nakashima , Takeshi Hoshida
IPC分类号： H04B10/00
CPC分类号： H04B10/299 , H04B2210/258
摘要： A repeater is disclosed that transmits an optical signal using wave division multiplexing. The repeater includes a demultiplexing unit that separates plural channels contained in the optical signal, an adjusting unit that adjusts at least optical power of each of the channels according to a control signal, a multiplexing unit that outputs a multiple wavelength signal in which the channels are multiplexed, and a monitoring unit that determines a modulation scheme and a bit rate of the optical signal for each of the channels so as to generate the control signal.
摘要翻译：公开了使用波分复用来发送光信号的中继器。中继器包括：分离单元，分离包含在光信号中的多个信道;调节单元，用于根据控制信号调整至少每个信道的光功率;多路复用单元，其输出信道为以及监测单元，其确定每个信道的光信号的调制方案和比特率，以便产生控制信号。

98. 发明授权

US07603045B2 Method and system for automatic feedback control for fine tuning a delay interferometer 有权
公开(公告)号：US07603045B2
公开(公告)日：2009-10-13
申请号：US10651125
申请日：2003-08-28
申请人： Takeshi Hoshida , Seemant Choudhary
发明人： Takeshi Hoshida , Seemant Choudhary
IPC分类号： H04B10/06 , H04B10/12 , H04B10/00
CPC分类号： H04B10/69 , H04B10/67 , H04B10/676 , H04B10/677
摘要： A method for receiving an optical signal is included where an ingress signal is split into a first portion and a second portion. A relative delay is induced between the first portion and the second portion, which are optically interfered to generate at least one interfered signal. Quality criteria of a monitored signal at least based on the at least one interfered signal is monitored so that a relative delay based in the quality criteria may be adjusted.

99. 发明授权

US07593646B2 Upgraded optical communication system with increased transmission capacity and method 有权
公开(公告)号：US07593646B2
公开(公告)日：2009-09-22
申请号：US12332755
申请日：2008-12-11
申请人： Olga I. Vassilieva , Takeshi Hoshida
发明人： Olga I. Vassilieva , Takeshi Hoshida
IPC分类号： H04B10/04
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/5561 , H04J14/02 , H04J14/06
摘要： A method for upgrading a wavelength division multiplex (WDM) optical communication system includes replacing an installed transmitter operable to transmit a data stream at a defined bit rate with a return-to-zero M-ary phased shift keying (RZ-mPSK) transmitter operable to transmit the data stream at the defined bit rate and at least one other data stream at the defined bit rate together in an RZ-mPSK signal having a combined bit rate at least double the defined bit rate and a symbol rate equal to the defined bit rate. An installed receiver operable to receive the data stream at the defined bit rate is replaced with an RZ-mPSK receiver operable to recover the data stream at the defined bit rate and the at least one other data stream at the defined bit rate from the RZ-mPSK signal.

100. 发明申请

US20090092395A1 Upgraded Optical Communication System with Increased Transmission Capacity and Method 有权
标题翻译：提高传输容量和方法的升级光通信系统
公开(公告)号：US20090092395A1
公开(公告)日：2009-04-09
申请号：US12332755
申请日：2008-12-11
申请人： Olga I. Vassilieva , Takeshi Hoshida
发明人： Olga I. Vassilieva , Takeshi Hoshida
IPC分类号： H04J14/02
CPC分类号： H04B10/505 , H04B10/5051 , H04B10/5053 , H04B10/5561 , H04J14/02 , H04J14/06
摘要： A method for upgrading a wavelength division multiplex (WDM) optical communication system includes replacing an installed transmitter operable to transmit a data stream at a defined bit rate with a return-to-zero M-ary phased shift keying (RZ-mPSK) transmitter operable to transmit the data stream at the defined bit rate and at least one other data stream at the defined bit rate together in an RZ-mPSK signal having a combined bit rate at least double the defined bit rate and a symbol rate equal to the defined bit rate. An installed receiver operable to receive the data stream at the defined bit rate is replaced with an RZ-mPSK receiver operable to recover the data stream at the defined bit rate and the at least one other data stream at the defined bit rate from the RZ-mPSK signal.
摘要翻译：一种用于升级波分多路复用（WDM）光通信系统的方法，包括：替换已安装的发射机，该发射机可操作地以定义的比特率传输数据流，并具有可返回到零的M阶相位移位键控（RZ-mPSK）发射机，其可操作以定义的比特率和至少一个其他数据流以规定的比特率一起发送具有组合比特率的RZ-mPSK信号，所述RZ-mPSK信号至少是所定义的比特率的两倍以及等于定义的比特率的符号率率。用于以定义的比特率接收数据流的安装的接收器被RZ-mPSK接收器代替，所述RZ-mPSK接收器可操作以以定义的比特率恢复数据流，并且所述至少一个其它数据流以来自RZ- mPSK信号。

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