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.

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。

公开(公告)号：US07483639B2

公开(公告)日：2009-01-27

申请号：US09853323

申请日：2001-05-10

申请人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

发明人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

IPC分类号： H04B10/00

CPC分类号： H04B10/2916 ,  H01S3/094011 ,  H01S3/302

摘要： A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transmitted over an optical link. The optical information signal is amplified over a length of the optical link with a co-launched amplification signal traveling in the optical link in a same direction as the optical information signal.

摘要翻译： 用于在光通信系统中发送信息的方法和系统包括用数据信号调制光载波信号的非强度特性以产生光信息信号。 光信息信号通过光链路传输。 光信息信号在光链路的长度上以与光信息信号相同的方向在光链路中行进的共同放大信号放大。

公开(公告)号：US20080239448A1

公开(公告)日：2008-10-02

申请号：US12058406

申请日：2008-03-28

申请人： Toshiki Tanaka ,  Hideyuki Miyata ,  Yuichi Akiyama ,  Takeshi Hoshida

发明人： Toshiki Tanaka ,  Hideyuki Miyata ,  Yuichi Akiyama ,  Takeshi Hoshida

IPC分类号： G02F1/00

CPC分类号： G02F1/2255 ,  G02F1/0123 ,  H04B10/505 ,  H04B10/5162 ,  H04B10/5167 ,  H04B10/5561

摘要： According to an aspect of an embodiment, an optical modulation device includes a Mach-Zehnder modulator and a controller. The Mach-Zehnder modulator is supplied a drive signal and a bias voltage. The Mach-Zehnder modulator modulates inputted light on the bases of the drive signal and the bias voltage. The drive signal selectively is superimposes a predetermined frequency signal. The bias voltage selectively is superimposes the predetermined frequency signal. The controller selects a superimposing target which is the drive signal or the bias voltage so as to change modulation formats.

摘要翻译： 根据实施例的一个方面，光调制装置包括马赫 - 曾德调制器和控制器。 马赫曾德尔调制器提供驱动信号和偏置电压。 Mach-Zehnder调制器根据驱动信号和偏置电压调制输入的光。 驱动信号选择性地叠加预定的频率信号。 选择性地将偏置电压叠加在预定频率信号上。 控制器选择作为驱动信号或偏置电压的叠加目标，以便改变调制格式。

公开(公告)号：US07415182B2

公开(公告)日：2008-08-19

申请号：US11480857

申请日：2006-07-06

申请人： Takafumi Terahara ,  Rainer Hainberger ,  Takeshi Hoshida

发明人： Takafumi Terahara ,  Rainer Hainberger ,  Takeshi Hoshida

IPC分类号： G02B6/44 ,  G02B6/02

CPC分类号： H04B10/2916 ,  G02B6/02252 ,  G02B6/02266 ,  G02B6/262 ,  G02B6/29377 ,  H01S3/302 ,  H04B10/25253 ,  H04B2210/003

摘要： An optical fiber cable including first, second and third optical fibers connected together so that light traveling through the cable travels through the first optical fiber, then through the second optical fiber and then through the third optical fiber. The second optical fiber has a negative dispersion value. The first and third optical fibers each have a positive dispersion value. The cable optically connects together two optical repeater stations, or an optical repeater station and an end station. Lengths of the first, second and third optical fibers are set so that loss in the first, second and third optical fibers of light transmitted through the first, second and third optical fibers is compensated by Raman amplification occurring in the first, second and third optical fibers.

摘要翻译： 一种光纤电缆，包括连接在一起的第一，第二和第三光纤，使得穿过电缆的光线穿过第一光纤，然后穿过第二光纤，然后穿过第三光纤。 第二光纤具有负色散值。 第一和第三光纤各自具有正色散值。 电缆将两个光中继站或光中继站和终端站光学连接在一起。 设置第一，第二和第三光纤的长度，使得透过第一，第二和第三光纤的光的第一，第二和第三光纤中的损耗由在第一，第二和第三光纤中的第一，第二和第三光纤 纤维。

公开(公告)号：US20080145066A1

公开(公告)日：2008-06-19

申请号：US11905148

申请日：2007-09-27

申请人： Takeshi Hoshida

发明人： Takeshi Hoshida

IPC分类号： H04B10/06

CPC分类号： H04B10/614 ,  H04B10/61 ,  H04B10/613 ,  H04B10/63

摘要： A coherent optical receiver of the invention combines local oscillator light having orthogonal polarization components in which the optical frequencies are different to each other, and received signal light, in an optical hybrid circuit, and then photoelectrically converts this in two differential photodetectors. Then this is converted to a digital signal in an AD conversion circuit, and computation processing is executed in a digital computing circuit using the digital signal, to estimate received data. At this time, the optical frequency difference between the orthogonal polarization components of the local oscillator light is set so as to be smaller than two times the signal light band width, and larger than a spectrum line width of the signal light source and the local oscillator light source. As a result, it is possible to realize a small size polarization independent coherent optical receiver that is capable of receiving high speed signal light.

摘要翻译： 本发明的相干光接收机将具有光频率彼此不同的正交偏振分量的本机振荡器光和接收信号光组合在光混合电路中，然后在两个差分光电检测器中对其进行光电转换。 然后将其转换为AD转换电路中的数字信号，并且在使用数字信号的数字计算电路中执行计算处理，以估计接收的数据。 此时，将本地振荡光的正交偏振分量之间的光频差设定为小于信号光带宽度的两倍，并且大于信号光源和本机振荡器的谱线宽度 光源。 结果，可以实现能够接收高速信号光的小尺寸偏振无关相干光接收机。

公开(公告)号：US20070292140A1

公开(公告)日：2007-12-20

申请号：US11593591

申请日：2006-11-07

申请人： Yoshikazu Terayama ,  Noriaki Mizuguchi ,  Eiji Ishikawa ,  Takashi Toyomaki ,  Kenichi Kaburagi ,  Takeshi Hoshida ,  Jens Rasmussen ,  Akihiko Isomura

发明人： Yoshikazu Terayama ,  Noriaki Mizuguchi ,  Eiji Ishikawa ,  Takashi Toyomaki ,  Kenichi Kaburagi ,  Takeshi Hoshida ,  Jens Rasmussen ,  Akihiko Isomura

IPC分类号： H04B10/00

CPC分类号： H04B10/66

摘要： A calculation processing unit controls temperature of a Peltier device based on a slope of a waveform obtained by subtracting a waveform of a B-arm monitoring signal from a waveform of an A-arm monitoring signal and a value obtained by subtracting a value B of the B-arm monitoring signal from a value A of the A-arm monitoring signal. Similarly, the calculation processing unit controls a phase of the A-arm and a phase of the B-arm. An A-arm side micro-controller controls temperature of an A-arm side heater 22 based on the value of the A-arm monitoring signal, and controls the phase of the A-arm. A B-arm side micro-controller controls temperature of a B-arm side heater based on the value B of the B-arm monitoring signal, and controls the phase of the B-arm.

摘要翻译： 计算处理单元基于通过从A臂监视信号的波形中减去B臂监视信号的波形而获得的波形的斜率，以及通过从A臂监视信号的波形中减去B的值得到的值来控制珀耳帖装置的温度 B臂监控信号从A臂A值监控信号。 类似地，计算处理单元控制A臂的相位和B臂的相位。 A臂侧微型控制器基于A臂监视信号的值来控制A臂侧加热器22的温度，并且控制A臂的相位。 B臂侧微控制器基于B臂监控信号的值B控制B臂侧加热器的温度，并控制B臂的相位。

公开(公告)号：US20070248361A1

公开(公告)日：2007-10-25

申请号：US11517392

申请日：2006-09-08

申请人： Kentaro Nakamura ,  Masahiro Yuki ,  Takeshi Hoshida ,  George Ishikawa

发明人： Kentaro Nakamura ,  Masahiro Yuki ,  Takeshi Hoshida ,  George Ishikawa

IPC分类号： H04B10/00

CPC分类号： H04J14/0212 ,  H04B10/2569 ,  H04B10/532 ,  H04J14/0204 ,  H04J14/0206 ,  H04J14/0209 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/028 ,  H04J14/0283

摘要： A polarization scrambler has a polarization state rotating unit rotating the polarization state of a signal light, and a rotation speed controlling unit controlling the rotation speed of the polarization state in the polarization state rotating unit on the basis of the speed and scheme of modulation of the signal light, and the value of polarization mode dispersion of a transmission path on which the signal light is to be transmitted. Degradation of the transmission quality due to PMD is more mitigated than the known techniques.

摘要翻译： 偏振加扰器具有旋转信号光的偏振状态的偏振状态旋转单元，以及基于偏振状态旋转单元的调制速度和调制方式来控制偏振状态旋转单元中的偏振状态的旋转速度的旋转速度控制单元 信号光，以及发射信号光的传输路径的偏振模色散值。 由PMD导致的传输质量的降低比已知技术更为缓和。

公开(公告)号：US20070230625A1

公开(公告)日：2007-10-04

申请号：US11476028

申请日：2006-06-28

申请人： Kazuo Hironishi ,  Takeshi Hoshida

发明人： Kazuo Hironishi ,  Takeshi Hoshida

IPC分类号： H04L27/22

CPC分类号： H04B10/66

摘要： An interferometer comprises a delay element and a phase shift element. The delay element delays an optical DQPSK signal by one-symbol time. The phase shift element shifts the optical DQPSK signal by π/8. A pair of photodiodes converts each of a pair of optical signals output from the interferometer into an electric signal. A photodetector circuit converts differential current obtained by a pair of the photodiodes into voltage and outputs as a detection signal. A first decision circuit outputs one-bit information based on the voltage of the detection signal. A second decision circuit outputs one-bit information based on a squared value of the voltage of the detection signal.

摘要翻译： 干涉仪包括延迟元件和相移元件。 延迟元件将光DQPSK信号延迟一个符号时间。 相移元件将光DQPSK信号移位pi / 8。 一对光电二极管将从干涉仪输出的一对光信号中的每一个转换为电信号。 光检测器电路将由一对光电二极管获得的差分电流转换为电压和输出作为检测信号。 第一判定电路基于检测信号的电压输出一位信息。 第二判定电路基于检测信号的电压的平方值输出一位信息。

公开(公告)号：US07254342B2

公开(公告)日：2007-08-07

申请号：US10696375

申请日：2003-10-29

申请人： Kaori Odate ,  Olga I. Vassilieva ,  Takeshi Hoshida

发明人： Kaori Odate ,  Olga I. Vassilieva ,  Takeshi Hoshida

IPC分类号： H04B10/12

CPC分类号： H04B10/25133 ,  H04B10/25137 ,  H04J14/02 ,  H04J14/0221

摘要： A method is provided for transmitting information in an optical communication system that includes transmitting an optical information signal at a wavelength over an optical link with a first and second end. The optical information signal is pre-distorted for dispersion proximate the first end of the optical link. The optical information signal is then compensated proximate the second end of the optical link for dispersion, wherein the pre-distortion and the compensation have opposite polarity at the transmitting wavelength.

摘要翻译： 提供了一种用于在光通信系统中发送信息的方法，该光通信系统包括以具有第一端和第二端的光链路上的波长发送光信息信号。 光信息信号被预失真以用于在光链路的第一端附近的色散。 然后在光链路的第二端附近补偿光信息信号用于色散，其中预失真和补偿在透射波长处具有相反的极性。