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：US20120155883A1

公开(公告)日：2012-06-21

申请号：US13324539

申请日：2011-12-13

申请人： Toshiki TANAKA ,  Tomoo TAKAHARA

发明人： Toshiki TANAKA ,  Tomoo TAKAHARA

IPC分类号： H04B10/00

CPC分类号： H04B10/6161

摘要： An optical receiver includes an analog/digital converter, and a control circuit. The analog/digital converter has a dynamic range at a time of converting an analog electric signal generated based on an optical signal to a digital electric signal. The dynamic range is variable, and the control circuit varies the dynamic range of the analog/digital converter based on the chromatic dispersion of the optical signal.

摘要翻译： 光接收机包括模拟/数字转换器和控制电路。 模拟/数字转换器在将基于光信号生成的模拟电信号转换为数字电信号时具有动态范围。 动态范围是可变的，并且控制电路基于光信号的色散改变模拟/数字转换器的动态范围。

公开(公告)号：US20110293276A1

公开(公告)日：2011-12-01

申请号：US13112353

申请日：2011-05-20

申请人： Tomoo TAKAHARA

发明人： Tomoo TAKAHARA

IPC分类号： H04J14/06 ,  H04J14/00

CPC分类号： H04B10/5053 ,  H04B10/5057 ,  H04B10/58

摘要： An optical transmitter includes: a first modulator that modulates a first optical signal with a first data signal; a second modulator that modulates a second optical signal with a second data signal; a multiplexer that multiplexes the first optical signal and the modulated second optical signal to output a multiplexed signal; a phase difference data generator that generates a phase difference signal corresponding to a phase difference between the modulated first optical signal and the modulated second optical signal from the multiplexed signal; and a controller that controls the phase difference between the modulated first optical signal and the modulated second optical signal based on the phase difference signal.

摘要翻译： 一种光发射机包括：第一调制器，用第一数据信号调制第一光信号; 第二调制器，用第二数据信号调制第二光信号; 复用器，其多路复用第一光信号和调制的第二光信号以输出复用的信号; 相位差数据发生器，从所述多路复用信号生成与所述经调制的第一光信号和所述经调制的第二光信号之间的相位差对应的相位差信号; 以及控制器，其基于所述相位差信号来控制所述经调制的第一光信号和所述经调制的第二光信号之间的相位差。

公开(公告)号：US20100260504A1

公开(公告)日：2010-10-14

申请号：US12754828

申请日：2010-04-06

申请人： Tomoo TAKAHARA

发明人： Tomoo TAKAHARA

IPC分类号： H04B10/00

CPC分类号： H04B10/5561 ,  H04B10/5053 ,  H04B10/532 ,  H04B10/60 ,  H04B10/611 ,  H04B10/614 ,  H04B10/6165

摘要： An optical transmission system includes an optical transmitter that includes first and second light sources, first and second phase modulators respectively modulating light from the first and the second light sources, and a polarized beam combiner combining the light output from the first and the second phase modulators to output an optical signal; and an optical receiver that includes a local oscillator, a polarization beam splitter splitting, according to polarization, the optical signal transmitted from the optical transmitter, and first and second digital coherent receivers corresponding to the first and the second phase modulators, and including a frontend that mixes light from the local oscillator and the polarization-split optical signal to output an electrical signal of real and imaginary parts, an analog-digital converting unit converting the electrical signal to a digital signal, and a digital signal processing unit estimating phase of the digital signal and extracting a signal.

摘要翻译： 一种光传输系统包括：包括第一和第二光源的光发射机，分别调制来自第一和第二光源的光的第一和第二相位调制器;以及组合来自第一和第二相位调制器的光输出的偏振光束组合器 以输出光信号; 以及光接收器，其包括本地振荡器，偏振分束器根据偏振器分离从光发射器发送的光信号，以及对应于第一和第二相位调制器的第一和第二数字相干接收器，并且包括前端 混合来自本地振荡器和偏振分离光信号的光以输出实部和虚部的电信号，将电信号转换为数字信号的模拟数字转换单元，以及数字信号处理单元估计相位 数字信号并提取信号。

公开(公告)号：US20100092186A1

公开(公告)日：2010-04-15

申请号：US12575810

申请日：2009-10-08

申请人： Tomoo TAKAHARA

发明人： Tomoo TAKAHARA

IPC分类号： H04B10/06

CPC分类号： H04B10/695

摘要： An apparatus and method includes converting an optical signal that is received into an electrical signal and outputting the electrical signal, converting the electrical signal into a data signal and outputting the data signal by comparing the electrical signal with a reference voltage, monitoring the electrical signal and output monitored information, and controlling the reference voltage based on the monitored information.

摘要翻译： 一种装置和方法，包括将接收的光信号转换为电信号并输出​​电信号，将电信号转换为数据信号，并通过将电信号与参考电压进行比较来输出数据信号，监测电信号和 输出监视信息，并且基于所监视的信息来控制参考电压。

公开(公告)号：US20080240737A1

公开(公告)日：2008-10-02

申请号：US12056621

申请日：2008-03-27

申请人： Tomoo TAKAHARA

发明人： Tomoo TAKAHARA

IPC分类号： H04B10/06

CPC分类号： H04J3/0602 ,  H04B10/695 ,  H04J3/047 ,  H04J3/0685

摘要： An optical receiver converting an optical signal modulated by differential phase shift keying to electrical first and second data signals; generating a clock signal from the first data signal; demultiplexing the first data signal into two signals; latching the two signals using the clock signal; delaying the clock signal by a certain amount; latching the two signals using the delayed clock signal; demultiplexing the second data signal into two additional signals; generating an inverted clock signal by inverting the clock signal; latching the two additional signals using the inverted clock signal or the clock signal; and further latching the two additional signals using the delayed clock signal.

摘要翻译： 一种光接收器，其将通过差分相移键控调制的光信号转换为电的第一和第二数据信号; 从所述第一数据信号产生时钟信号; 将第一数据信号解复用为两个信号; 使用时钟信号锁存两个信号; 将时钟信号延迟一定量; 使用延迟时钟信号锁存两个信号; 将第二数据信号解复用为两个附加信号; 通过反相时钟信号产生反相时钟信号; 使用反相时钟信号或时钟信号来锁存两个附加信号; 并且使用延迟的时钟信号进一步锁存两个附加信号。