公开(公告)号：US20080170864A1

公开(公告)日：2008-07-17

申请号：US12013708

申请日：2008-01-14

申请人： Masato NISHIHARA ,  Tomoo Takahara ,  Yuichi Akiyama ,  Masahiro Yuki

发明人： Masato NISHIHARA ,  Tomoo Takahara ,  Yuichi Akiyama ,  Masahiro Yuki

IPC分类号： H04B10/04

CPC分类号： H04B10/548 ,  H04B10/5162

摘要： The disclosed device and method include varying phases of two data signals at a first predetermined frequency, performing multi-level phase modulation of a light based on the two data signals whose phases are varied at the first predetermined frequency, extracting a component having the first predetermined frequency from an optical signal subjected to the phase modulation, and controlling the phases of the two data signals based on the component extracted from the optical signal.

摘要翻译： 所公开的设备和方法包括以第一预定频率改变两个数据信号的相位，基于相位以第一预定频率变化的两个数据信号执行光的多电平相位调制，提取具有第一预定频率的分量 来自经过相位调制的光信号的频率，并且基于从光信号提取的分量来控制两个数据信号的相位。

公开(公告)号：US08565617B2

公开(公告)日：2013-10-22

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

CPC分类号： H04B10/5561 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/5162 ,  H04B10/58

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

公开(公告)号：US20120263456A1

公开(公告)日：2012-10-18

申请号：US13369365

申请日：2012-02-09

申请人： Toshiki Tanaka ,  Masato Nishihara

发明人： Toshiki Tanaka ,  Masato Nishihara

IPC分类号： H04B10/08 ,  H04B10/18

CPC分类号： H04B10/5055 ,  H04B2210/254

摘要： A method for suppressing a skew between a first channel and a second channel in an optical transmission system having a transmitter that transmits an optical signal with the first channel and the second channel and a receiver that receives the optical signal, the method includes: controlling dispersion added to the optical signal to be larger than a specified amount; and controlling a delay time of at least one of the first channel and the second channel in the receiver based on a quality of the optical signal monitored in the receiver to suppress the skew between the first channel and the second channel in the receiver.

摘要翻译： 一种用于抑制具有发送光信号与第一信道和第二信道的发射机的光传输系统中的第一信道和第二信道之间的偏斜的方法以及接收光信号的接收机，该方法包括：控制色散 添加到光信号大于指定量; 以及基于在接收机中监视的光信号的质量来控制接收机中的第一信道和第二信道中的至少一个的延迟时间，以抑制接收机中第一信道和第二信道之间的偏斜。

公开(公告)号：US20120050844A1

公开(公告)日：2012-03-01

申请号：US13033786

申请日：2011-02-24

申请人： Masato Nishihara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Toshiki Tanaka

IPC分类号： H01S5/00 ,  H01S3/13 ,  H01S3/067

CPC分类号： H04B10/532 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/5059

摘要： A generation unit generates a polarization multiplexing signal in which two optical signals, each polarization of which is orthogonal to each other, are combined. A detector detects the powers of the two optical signals contained in the polarization multiplexing signal generated by the generation unit. An amplifier amplifies, according to each polarization of the two optical signals contained in the polarization multiplexing signal generated by the generation unit, the powers of the two optical signals. An controller controls a gain of the amplifier with respect to each polarization of the two optical signals so as to reduce difference in the powers of the two optical signals detected by the detector.

摘要翻译： 一代单元产生偏振复用信号，其中两个光信号彼此正交的两个光信号被组合。 检测器检测由生成单元生成的偏振复用信号中包含的两个光信号的功率。 根据由生成单元生成的偏振复用信号中包含的两个光信号的各极化，放大器放大两个光信号的功率。 控制器相对于两个光信号的每个偏振来控制放大器的增益，以便减少由检测器检测到的两个光信号的功率的差异。

公开(公告)号：US08073339B2

公开(公告)日：2011-12-06

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

公开(公告)号：US08064130B2

公开(公告)日：2011-11-22

申请号：US10351340

申请日：2003-01-27

申请人： Masato Nishihara ,  Yasushi Sugaya ,  Etsuko Hayashi

发明人： Masato Nishihara ,  Yasushi Sugaya ,  Etsuko Hayashi

IPC分类号： H04B10/17 ,  H04B10/12

CPC分类号： H04B10/2935 ,  H01S3/06758 ,  H01S3/06775 ,  H01S3/094011 ,  H01S3/10007 ,  H01S3/10023 ,  H01S3/1608 ,  H01S2301/02 ,  H01S2301/04

摘要： It is an object of the present invention to provide an optical amplifier using optical amplification mediums each doped with a rare earth element for increasing amplification efficiency of signal light in S-band and the like. To this end, the optical amplifier is constituted such that, when performing optical amplification for S-band and the like in which a center wavelength of a gain peak in the optical amplification medium is located at an outside of a signal band, a gain coefficient of when a pumping condition of the optical amplification medium is maximum is set so that a parameter η obtained by dividing a minimum value of the gain coefficient in the signal band by a maximum value of the gain coefficient outside of the signal band becomes a previously set value or more, wherein, for example, the parameter η can be increased by controlling a temperature of each of a plurality of EDFs between which gain equalizers are disposed.

摘要翻译： 本发明的目的是提供一种使用各自掺杂有稀土元素的光放大介质的光放大器，用于提高S波段等信号光的放大效率。 为此，光放大器被构成为：当对光放大介质中的增益峰值的中心波长位于信号频带外侧的S波段等进行光放大时，增益系数 当光放大介质的泵送条件最大时，设定参数＆egr; 通过将信号频带中的增益系数的最小值除以信号频带之外的增益系数的最大值而获得的值成为预先设定的值以上，其中，例如参数＆egr; 可以通过控制在其间设置增益均衡器的多个EDF中的每一个的温度来增加。

公开(公告)号：US20110229150A1

公开(公告)日：2011-09-22

申请号：US13048150

申请日：2011-03-15

申请人： Masato NISHIHARA ,  Tomoo TAKAHARA ,  Takeshi HOSHIDA

发明人： Masato NISHIHARA ,  Tomoo TAKAHARA ,  Takeshi HOSHIDA

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B10/5162

摘要： An optical modulation apparatus includes a first modulator, a second modulator, a multiplexer, a calculator and an adjustor. The first modulator configured to modulate light emitted by a light source using a first input signal and output a first modulated signal. The second modulator configured to modulate the light using a second input signal and output a second modulated signal. The multiplexer configured to multiplex the first and second modulated signals and output a multiplexed signal. The calculator configured to calculate a power difference between a higher-side frequency component having a frequency higher than a center frequency of the multiplexed signal and a lower-side frequency component having a frequency lower than the center frequency. The adjustor configured to adjust delays of the first and second input signals based on the power.

摘要翻译： 光调制装置包括第一调制器，第二调制器，多路复用器，计算器和调节器。 第一调制器被配置为使用第一输入信号调制由光源发射的光并输出第一调制信号。 第二调制器被配置为使用第二输入信号调制光并输出第二调制信号。 复用器被配置为复用第一和第二调制信号并输出​​多路复用信号。 所述计算器被配置为计算频率高于所述多路复用信号的中心频率的较高侧频率分量与具有低于所述中心频率的频率的下侧频率分量之间的功率差。 调整器被配置为基于功率来调整第一和第二输入信号的延迟。

公开(公告)号：US07853152B2

公开(公告)日：2010-12-14

申请号：US11387936

申请日：2006-03-24

申请人： Masato Nishihara ,  Tomoo Takahara ,  George Ishikawa

发明人： Masato Nishihara ,  Tomoo Takahara ,  George Ishikawa

IPC分类号： H04B10/02

CPC分类号： H04B10/66 ,  H04L25/03159 ,  H04L2025/03522

摘要： A signal regeneration device which makes an extracted clock signal highly accurate while maintaining superior receiving sensitivity. To this end, a device of the present invention is configured to have a branch section for branching an input electrical signal which has been demodulated from a differential phase-shift modulated state; a first filter for equalizing a waveform of one of the demodulated electrical signals branched by the branch section; a clock recovery section for recovering a clock signal from the demodulated electrical signal whose waveform has been equalized by the first filter; and a data regeneration section for regenerating a data signal from a remaining one of the demodulated electrical signals branched by the branch section and from a clock signal recovered by the clock recovery section.

摘要翻译： 一种信号再生装置，其使得提取的时钟信号高度准确，同时保持优异的接收灵敏度。 为此，本发明的装置被配置为具有分支部分，用于对已经从差分相移调制状态解调的输入电信号进行分支; 第一滤波器，用于对由分支部分分支的解调电信号之一的波形进行均衡; 时钟恢复部分，用于从已被第一滤波器均衡的解调电信号中恢复时钟信号; 以及数据再生部分，用于从由分支部分分支的解调电信号中的剩余的一个信号和由时钟恢复部分恢复的时钟信号再生数据信号。

公开(公告)号：US20090041473A1

公开(公告)日：2009-02-12

申请号：US12219860

申请日：2008-07-29

申请人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

发明人： Masato Nishihara ,  Tomoo Takahara ,  Toshiki Tanaka

IPC分类号： H04B10/04

CPC分类号： H04B10/5561 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5057 ,  H04B10/5162 ,  H04B10/58

摘要： An optical modulation device including waveform shapers that waveform-shape input data signals in synchronism with a rising or falling timing based on comparison with a reference level of an input clock signal, a multi-level phase modulator that generates a multi-level-phase-modulated optical signal based on the data signals waveform-shaped by the plurality of waveform shapers, and outputs the generated optical signal, and a level ratio controller that varies a relative level ratio of the reference level to an amplitude level of the clock signal input to the waveform shapers, based on the optical signal output from the multi-level phase modulator.

摘要翻译： 一种光调制装置，包括：波形整形器，其基于与输入时钟信号的基准电平的比较，与上升或下降定时同步的波形输入数据信号，产生多电平相位调制器的多电平相位调制器， 基于由多个波形整形器波形形成的数据信号的调制光信号，并输出所生成的光信号;以及电平比控制器，其将参考电平的相对电平比改变为输入到 波形整形器，基于从多电平相位调制器输出的光信号。

公开(公告)号：US20080088915A1

公开(公告)日：2008-04-17

申请号：US11979370

申请日：2007-11-01

申请人： Etsuko Hayashi ,  Shunsuke Ono ,  Setsuhisa Tanabe ,  Shinichirou Muro ,  Masato Nishihara

发明人： Etsuko Hayashi ,  Shunsuke Ono ,  Setsuhisa Tanabe ,  Shinichirou Muro ,  Masato Nishihara

IPC分类号： H01S3/00 ,  H04B10/16 ,  H04B10/17 ,  H04J14/02

CPC分类号： H01S3/06754 ,  H01S3/0007 ,  H01S3/0064 ,  H01S3/06758 ,  H01S3/0677 ,  H01S3/09415 ,  H01S3/1608 ,  H01S2301/04

摘要： In an optical amplification characteristics simulation apparatus according to the present invention, using spectrums of a signal light input to an optical amplifier and a characteristic parameter for amplification medium, gain wavelength characteristics of the amplification medium are calculated. A calculating formula for the above has a parameter corresponding to a gain fluctuation portion due to a gain spectral hole burning (GSHB) phenomenon, and this parameter is defined by a function obtained by modeling a physical phenomenon in which a population inversion rate is reduced due to the GSHB, based on that electron occupation numbers in each Stark level on the end level side are increased. Then, based on the calculated gain wavelength characteristics, the output power of the signal light is obtained, to thereby perform the optical amplification characteristics simulation on the optical amplifier. As a result, it is possible to construct a high versatile calculation model based on the physical phenomenon for the gain fluctuation due to the GSHB, to thereby simulate with high precision the optical amplification characteristics of the optical amplifier under arbitrary conditions.

摘要翻译： 在根据本发明的光放大特性模拟装置中，使用输入到光放大器的信号光的光谱和放大介质的特性参数，计算放大介质的增益波长特性。 上述计算公式由于增益谱孔燃烧（GSHB）现象而具有与增益变动部分相对应的参数，该参数由通过模拟体积反转率减少的物理现象获得的函数来定义 根据GSHB的最终级别的每个Stark级别的电子占有数量增加。 然后，基于计算出的增益波长特性，获得信号光的输出功率，从而对光放大器进行光放大特性仿真。 结果，可以基于由于GSHB引起的增益波动的物理现象构建高通用性计算模型，从而以任意条件高精度模拟光放大器的光放大特性。