公开(公告)号：US06788832B2

公开(公告)日：2004-09-07

申请号：US10329537

申请日：2002-12-27

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Satoshi Oikawa ,  Kaoru Higuma

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Satoshi Oikawa ,  Kaoru Higuma

IPC分类号： G02F1295

CPC分类号： H04B10/50575 ,  G02F1/0123 ,  G02F1/0356 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2201/307 ,  H04B10/505

摘要： An optical modulation apparatus includes an optical signal input section, an optical signal propagation path, an optical modulator that modulates the phase of optical signals in at least two of a plurality of optical paths, and a wavelength selective filter that selectively reflects and transmits. Optical signals input via the input section are divided into a plurality of optical paths at a branching point and phase modulated by the phase modulator, that divides the optical path into a plurality of optical paths. Light transmitted by the filter is output via the output section, while light reflected by the filter travels back along the optical path and is again phase modulated by the phase modulator combined at the branching point and output from the input section as an intensity modulated optical signal.

摘要翻译： 光调制装置包括：光信号输入部，光信号传播路径，调制多个光路中的至少两个的光信号的相位的光调制器;以及选择性地反射和发送的波长选择滤波器。 通过输入部分输入的光信号在分支点被分成多个光路，并由相位调制器相位调制，将光路分成多个光路。 由滤波器发射的光通过输出部分输出，而由滤光器反射的光沿着光路返回，并且由在分支点处组合并由输入部分输出的相位调制器再次相位调制，作为强度调制光信号 。

公开(公告)号：US08170422B2

公开(公告)日：2012-05-01

申请号：US11658127

申请日：2005-07-19

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： H04J14/00

CPC分类号： H04B10/50577 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50575

摘要： It is an object of the present invention to provide an FSK demodulator which can be used in the optical information and telecommunications and the like, and which can appropriately demodulate an FSK signal by compensating a delay of an optical FSK modulated signal due to dispersion and the like of an optical fiber.The above-mentioned problem is solved by a frequency shift keying (FSK) demodulator (1) composed of a branching filter (2) for branching an optical signal according to wavelengths thereof; a delay adjusting apparatus (3) for adjusting a delay time of two lights branched by the branching filter; a first photodetector (4) for detecting one optical signal branched by the branching filter; a second photodetector (5) for detecting a remaining optical signal branched by the branching filter; and a means (6) for calculating a difference between an output signal of the first photodetector and an output signal of the second photodetector.

摘要翻译： 本发明的目的是提供一种可用于光信息和电信等的FSK解调器，并且可以通过补偿由于色散导致的光FSK调制信号的延迟来适当地解调FSK信号，并且 像光纤一样。 上述问题由用于根据其波长分支光信号的分波器（2）组成的频移键控（FSK）解调器（1）来解决; 延迟调整装置（3），用于调节由分支滤波器分支的两根光的延迟时间; 用于检测由分支滤波器分支的一个光信号的第一光电检测器（4） 第二光电检测器（5），用于检测由分支滤波器分支的剩余光信号; 以及用于计算第一光电检测器的输出信号和第二光电检测器的输出信号之间的差的装置（6）。

公开(公告)号：US07555223B2

公开(公告)日：2009-06-30

申请号：US11038767

申请日：2005-01-21

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： H04B10/04 ,  H04B10/12 ,  G02F1/00

CPC分类号： H04B1/7174

摘要： A UWB signal generator includes: a laser light source for generating laser light, an optical intensity modulator for modulating an intensity of laser light from the laser light source, a signal source of the optical intensity modulator for outputting a signal transmitted to the optical intensity modulator, an optical frequency shift keying (optical FSK) modulator to which output light from the optical intensity modulator is input, a signal source for controlling a signal transmitted to an RFC electrode of the optical FSK modulator, a high-frequency electric signal source for controlling a signal transmitted to an RFA electrode and an RFB electrode of the optical FSK modulator, and a high-speed photodetector for detecting an output from the optical FSK modulator.

摘要翻译： UWB信号发生器包括：用于产生激光的激光源，用于调制来自激光光源的激光强度的光强度调制器，用于输出发送到光强度调制器的信号的光强度调制器的信号源 输入来自光强度调制器的输出光的光频移键控（光FSK）调制器，用于控制发送到光FSK调制器的RFC电极的信号的信号源，用于控制光频FSK调制器的高频电信号源 发送到光学FSK调制器的RFA电极和RFB电极的信号，以及用于检测来自光学FSK调制器的输出的高速光电检测器。

公开(公告)号：US07526209B2

公开(公告)日：2009-04-28

申请号：US10960761

申请日：2004-10-08

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： H04B10/04

CPC分类号： H04B10/505 ,  H04B1/7163 ,  H04B10/5051 ,  H04B10/5563

摘要： An optical FSK modulator which can be used for an optical information communication is provided. The optical FSK is provided with: a second sub Mach-Zehnder waveguide (MZB) 3; a main Mach-Zehnder waveguide (MZC) 4 including the MZA and MZB and provided with a light input portion and a modulated light output portion; a first direct-current or low-frequency electrode (DCA electrode) 5 controlling a bias voltage between two arms composing the MZA, thereby controlling a phase of light propagating in the two arms of the MZA; a second direct-current or low-frequency electrode (DCB electrode) 6 controlling a bias voltage between two arms composing the MZB, thereby controlling a phase of light propagating in the two arms of the MZB; a first RF electrode (RFA electrode) 7 inputting a radio frequency (RF) signal to the two arms composing the MZA; a second RF electrode (RFB electrode) 8 inputting an RF signal to the two arms composing the MZB; and a traveling-wave-type electrode (RFC electrode) 11 controlling a voltage of the RF signal inputted, thereby controlling a frequency of light outputted from the output portion.

摘要翻译： 提供了可用于光信息通信的光FSK调制器。 光学FSK设有：第二子马赫 - 曾德尔波导（MZB）3; 包括MZA和MZB的主Mach-Zehnder波导（MZC）4，并设置有光输入部分和调制光输出部分; 控制构成MZA的两个臂之间的偏置电压的第一直流或低频电极（DCA电极）5，从而控制在MZA的两个臂中传播的光的相位; 控制构成MZB的两个臂之间的偏置电压的第二直流或低频电极（DCB电极）6，从而控制在MZB的两个臂中传播的光的相位; 向构成MZA的两个臂输入射频（RF）信号的第一RF电极（RFA电极）7; 将RF信号输入到构成MZB的两个臂的第二RF电极（RFB电极）8; 以及控制输入的RF信号的电压的行波型电极（RFC电极）11，从而控制从输出部输出的光的频率。

公开(公告)号：US20080304827A1

公开(公告)日：2008-12-11

申请号：US11658127

申请日：2005-07-19

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： H04J14/00

CPC分类号： H04B10/50577 ,  G02F1/2255 ,  G02F2001/212 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50575

摘要： It is an object of the present invention to provide an FSK demodulator which can be used in the optical information and telecommunications and the like, and which can appropriately demodulate an FSK signal by compensating a delay of an optical FSK modulated signal due to dispersion and the like of an optical fiber.The above mentioned problem is solved by a frequency shift keying (FSK) demodulator (1) composed of a branching filyer (2) for branching an optical signal according to wavelengths thereof; a delay adjusting apparutus (3) for adjusting a delay time of two lights branched by the branching filter; a first photodetector (4) for detecting one optical signal branched by the branching filter; a second photodetector (5) for detecting a remaing optical signal branched by the branching filter; and a means (6) for calculating a difference between an output signal of the first photodetector and an output signal of the second photodetector.

摘要翻译： 本发明的目的是提供一种可用于光信息和电信等的FSK解调器，并且可以通过补偿由于色散导致的光FSK调制信号的延迟来适当地解调FSK信号，并且 像光纤一样。 上述问题通过由用于根据其波长分支光信号的分支滤波器（2）组成的频移键控（FSK）解调器（1）来解决; 延迟调节装置（3），用于调节由分支滤波器分支的两根光的延迟时间; 用于检测由分支滤波器分支的一个光信号的第一光电检测器（4） 用于检测由所述分支滤波器分支的再生光信号的第二光电检测器（5）; 以及用于计算第一光电检测器的输出信号和第二光电检测器的输出信号之间的差的装置（6）。

公开(公告)号：US07236661B2

公开(公告)日：2007-06-26

申请号：US11091765

申请日：2005-03-29

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Sze Yun Set ,  Mark Kenneth Jablonski ,  Yuuichi Tanaka

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Sze Yun Set ,  Mark Kenneth Jablonski ,  Yuuichi Tanaka

IPC分类号： G02B6/26 ,  H04B10/00

CPC分类号： G02B6/2932 ,  G02B6/29322 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/29398 ,  H04B10/25133

摘要： This invention is a tunable dispersion compensation apparatus that suppresses the effects of the transmission channel dispersion which impedes transmission when optical signals used in high-speed communications are transmitted across long distances among various points. It is an apparatus that performs dispersion compensation upon received optical signals based on information that accompanies the received optical signals, or an apparatus that performs dispersion compensation in advance upon optical signals to be sent based on information related to the destination of the optical signals to be sent, including: an input block and output block for optical signals, with a dispersion element that has wavelength dispersion characteristics and a wavelength shifter that is able to adjust the amount of shift depending on the input optical signal provided in a circulating light path upon the light path from the input block to the output block, and further including a constitution whereby the input optical signal circulates around a circulating light path containing the dispersion element and wavelength shifter a stipulated number of times before reaching the output block, and a constitution whereby the number of times the light circulates is determined based on the information and input to the wavelength shifter.

摘要翻译： 本发明是一种可调谐色散补偿装置，其抑制在高速通信中使用的光信号在各点之间长距离地传输时阻碍传输的传输信道色散的影响。 根据接收到的光信号的信息，对接收到的光信号进行色散补偿的装置，或者根据与光信号的目的地有关的信息，预先对要发送的光信号进行色散补偿的装置 发送，包括：用于光信号的输入块和输出块，具有波长色散特性的色散元件和能够根据在循环光路中提供的输入光信号调整偏移量的波长移位器 从输入块到输出块的光路，还包括输入光信号在到达输出块之前在包含色散元件和波长移位器的循环光路周围循环规定次数的结构， 基于光线循环的次数确定 信息和输入到波长移位器。

公开(公告)号：US06791733B2

公开(公告)日：2004-09-14

申请号：US10092628

申请日：2002-03-08

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kenichi Kubodera

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Kenichi Kubodera

IPC分类号： G02F103

CPC分类号： G02F1/2255

摘要： A resonance type optical modulator includes an optical path having electro-optical effect characteristics, a modulation electrode formed along the optical path for applying an electric field to the optical path, a common electrode formed in opposition to the modulation electrode, a feeding line that is connected to the modulation electrode and stubs connected to the feeding line, wherein the feeding line, stubs and common electrode are provided on one side of a region that is divided by the modulation electrode. A specific example is a resonance type optical modulator using a symmetric or an asymmetric electrode, that includes an optical path having electro-optical effect characteristics, a first stub (an open stub) (an open-ended asymmetric coplanar waveguide) or a short stub (a short-ended asymmetric coplanar waveguide), a second stub (an open or short stub) connected to the first stub, a feeding line connected to the first and second stubs and a common electrode, wherein the first and second stubs are formed along a single optical path to comprise a modulation electrode for applying an electric field to the optical path. As a result, the modulator has a configuration easy to fabricate without damaging the effective modulation field strength applied to the optical path, making it possible to realize high modulation efficiency with a low level of electric power.

摘要翻译： 共振型光调制器包括具有电光效应特性的光路，沿着用于向光路施加电场的光路形成的调制电极，与调制电极相对形成的公共电极， 连接到调制电极和连接到馈电线的短截线，其中馈电线，短截线和公共电极设置在由调制电极分割的区域的一侧上。 一个具体实例是使用对称或不对称电极的共振型光学调制器，其包括具有电光效应特性的光路，第一短截线（开口短截线）（开口端不对称共面波导）或短截线 （短端不对称共面波导），连接到第一短截线的第二短截线（开口或短截线），连接到第一和第二短截线的馈电线和公共电极，其中第一和第二短截线沿着 包括用于向光路施加电场的调制电极的单个光路。 结果，调制器具有易于制造而不损害施加到光路的有效调制场强的构造，使得可以以低电平实现高调制效率。

公开(公告)号：US20080159754A1

公开(公告)日：2008-07-03

申请号：US11571281

申请日：2005-06-29

申请人： Tetsuya Kawanishi ,  Hiroshi Harada ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Hiroshi Harada ,  Masayuki Izutsu

IPC分类号： H04B10/04

CPC分类号： H03D9/00 ,  H04B10/505 ,  H04B10/5563

摘要： The object of the present invention is to provide a modulated optical signal generator utilizing the mechanism of a multiply optical modulator, and a modulated signal generator capable of outputting millimeter waves and the like utilizing the modulated optical signal generator.The above-mentioned object is solved by a modulated optical signal generator (1) provided with an optical modulator (2), a first optical filter (3), and a second optical filter (4), wherein a frequency of a multiplying optical modulation outputted from the second optical filter (4) is controlled by controlling the frequency of the modulating signal inputted to the optical modulator (2).

摘要翻译： 本发明的目的是提供一种利用多光调制器机构的调制光信号发生器，以及利用调制光信号发生器输出毫米波等的调制信号发生器。 上述目的通过具有光调制器（2），第一滤光器（3）和第二滤光器（4）的调制光信号发生器（1）来解决，其中乘法光调制 通过控制输入到光调制器（2）的调制信号的频率来控制从第二滤光器（4）输出的输出。

公开(公告)号：US07245787B2

公开(公告)日：2007-07-17

申请号：US11078695

申请日：2005-03-14

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F1/01 ,  G02F1/225

CPC分类号： H04B10/50575 ,  G02F1/0123 ,  G02F1/225 ,  H04B10/505 ,  H04B10/5053 ,  H04B10/50572 ,  H04B10/50577

摘要： A method of appropriately adjusting a bias signal of an optical modulator is provided. For an optical modulator provided with a first sub Mach-Zehnder waveguide, a second sub Mach-Zehnder waveguide and a main Mach-Zehnder waveguide, a predetermined signal is supplied to the main Mach-Zehnder waveguide, and bias signals supplied to the first and second Mach-Zehnder waveguides are adjusted so as to lower an amplitude of an output light of the main Mach-Zehnder waveguide.

摘要翻译： 提供一种适当调整光调制器的偏置信号的方法。 对于具有第一子马赫 - 曾德尔波导，第二次马赫 - 曾德尔波导和主马赫 - 策德尔波导的光学调制器，向主马赫 - 策德尔波导提供预定信号，并将偏置信号提供给第一和 调整第二马赫 - 策德尔波导，以降低主马赫 - 策德尔波导的输出光的振幅。

公开(公告)号：US20050226554A1

公开(公告)日：2005-10-13

申请号：US11091765

申请日：2005-03-29

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Sze Set ,  Mark Jablonski ,  Yuuichi Tanaka

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Sze Set ,  Mark Jablonski ,  Yuuichi Tanaka

IPC分类号： G02F1/01 ,  G02B6/26 ,  G02B6/34 ,  G02F2/02 ,  H04B10/2507 ,  H04B10/2519 ,  H04B10/524

CPC分类号： G02B6/2932 ,  G02B6/29322 ,  G02B6/29394 ,  G02B6/29395 ,  G02B6/29398 ,  H04B10/25133

摘要： This invention is a tunable dispersion compensation apparatus that suppresses the effects of the transmission channel dispersion which impedes transmission when optical signals used in high-speed communications are transmitted across long distances among various points. It is an apparatus that performs dispersion compensation upon received optical signals based on information that accompanies the received optical signals, or an apparatus that performs dispersion compensation in advance upon optical signals to be sent based on information related to the destination of the optical signals to be sent, including: an input block and output block for optical signals, with a dispersion element that has wavelength dispersion characteristics and a wavelength shifter that is able to adjust the amount of shift depending on the input optical signal provided in a circulating light path upon the light path from the input block to the output block, and further including a constitution whereby the input optical signal circulates around a circulating light path containing the dispersion element and wavelength shifter a stipulated number of times before reaching the output block, and a constitution whereby the number of times the light circulates is determined based on the information and input to the wavelength shifter.

摘要翻译： 本发明是一种可调谐色散补偿装置，其抑制在高速通信中使用的光信号在各点之间长距离地传输时阻碍传输的传输信道色散的影响。 根据接收到的光信号的信息，对接收到的光信号进行色散补偿的装置，或者根据与光信号的目的地有关的信息，预先对要发送的光信号进行色散补偿的装置 发送，包括：用于光信号的输入块和输出块，具有波长色散特性的色散元件和能够根据在循环光路中提供的输入光信号调整偏移量的波长移位器 从输入块到输出块的光路，还包括输入光信号在到达输出块之前在包含色散元件和波长移位器的循环光路周围循环规定次数的结构， 基于光线循环的次数确定 信息和输入到波长移位器。