公开(公告)号：US06304689B1

公开(公告)日：2001-10-16

申请号：US09227355

申请日：1999-01-08

申请人： Benjamin Dingel ,  Masayuki Izutsu

发明人： Benjamin Dingel ,  Masayuki Izutsu

IPC分类号： G02B6293

CPC分类号： G02B6/29349 ,  G02B6/12019 ,  G02B6/2935 ,  G02B6/29358 ,  G02B6/29395

摘要： A general multi-function optical filter for future smart, high density wavelength division multiplexed (WDM) communication and network system applications using a Michelson-GT interferometer (MGTI) is invented. MGTI filter is a typical Michelson interferometer in which one of its reflecting mirrors is replaced by Gires-Toumois resonator (GTR). One unique feature of this device is that it can function as channel passing, channel dropping and wide bandpass filters depending on the interferometer arm length difference. The output of these functions is available in a single port. Other interesting features of this element are (1) that linewidths of both channel dropping and channel passing filters are twice as narrow compared with typical Fabry-Perot filter having similar parameters, (2) that visibility of the output for three functions is always unity regardless of the mirror reflectance value, and (3) that bandpass filter has an excellent, near-perfect, box-like response function. Numerical results showing these characteristics are presented and other applications are discussed.

摘要翻译： 发明了一种用于未来智能，高密度波分复用（WDM）通信和使用迈克尔逊-GM干涉仪（MGTI）的网络系统应用的通用多功能滤光器。 MGTI滤波器是典型的迈克尔逊干涉仪，其中一个反射镜被Gires-Toumois谐振器（GTR）代替。 该器件的一个独特之处在于它可以作为通道通道，通道丢弃和宽带通滤波器，具体取决于干涉仪臂长度差异。 这些功能的输出可以在单个端口中使用。 该元件的其他有趣的特征是（1）与具有相似参数的典型法布里 - 珀罗滤波器相比，信道丢弃和信道通过滤波器的线宽是两倍，（2）三个函数的输出的可视性总是为单位 的镜面反射率值，以及（3）带通滤波器具有优良的接近完美的盒状响应函数。 给出了显示这些特性的数值结果，并讨论了其他应用。

公开(公告)号：US07957652B2

公开(公告)日：2011-06-07

申请号：US12064597

申请日：2006-08-23

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Takahide Sakamoto ,  Masahiro Tsuchiya

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Takahide Sakamoto ,  Masahiro Tsuchiya

IPC分类号： H04B10/04

CPC分类号： H04B10/5165 ,  G02F1/225 ,  H04B10/505 ,  H04B10/5563

摘要： It is an object of the present invention to provide an optical modulator which is capable of adjusting optical intensity of optical signals which contains non-desired components so that the intensity of the components become at a similar level, whereby the optical modulator is capable of effectively suppressing the non-desired components when the optical signals are combined.

摘要翻译： 本发明的目的是提供一种光调制器，其能够调节包含非期望分量的光信号的光强度，使得各部件的强度变成相似的水平，从而光调制器能够有效地 当光信号被组合时，抑制不期望的分量。

公开(公告)号：US20090103163A1

公开(公告)日：2009-04-23

申请号：US12063436

申请日：2006-08-09

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Takahide Sakamoto ,  Masahiro Tsuchiya

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu ,  Takahide Sakamoto ,  Masahiro Tsuchiya

IPC分类号： G02F1/01

CPC分类号： G02F1/0311 ,  G02F2/02 ,  G02F2201/17 ,  G02F2201/307

摘要： In order to provide a reciprocating optical modulation system capable of obtaining a broad bandwidth, a reciprocating optical modulation system (1) of the present invention is basically provided with an optical modulator (2) modulating an output light by controlling one of an intensity, a phase and a frequency of an input light; a first fiber grating (3) transmitting a light of a predetermined frequency domain among lights inputted to and outputted from the optical modulator while reflecting lights of other frequencies; a second fiber grating (4) transmitting a light of a predetermined frequency domain among lights inputted to and outputted from the optical modulator while reflecting lights of other frequencies; and a signal source (5) generating a modulating signal to be inputted to the optical modulator (2).

摘要翻译： 为了提供能够获得宽带宽的往复式光调制系统，本发明的往复式光调制系统（1）基本上设置有光调制器（2），通过控制强度， 输入光的相位和频率; 第一光纤光栅（3），其在反射其他频率的光的同时，在从所述光调制器输入和输出的光之间传输预定频域的光; 第二光纤光栅（4），其在反射其他频率的光的同时，在从所述光调制器输入和输出的光之间传输预定频域的光; 以及产生要输入到光调制器（2）的调制信号的信号源（5）。

公开(公告)号：US20080212915A1

公开(公告)日：2008-09-04

申请号：US11983071

申请日：2007-11-07

申请人： Junichiro Ichikawa ,  Kaoru Higuma ,  Futoshi Yamamoto ,  Satoshi Oikawa ,  Shingo Mori ,  Sunao Kurimura ,  Kenji Kitamura ,  Tetsuya Kawanishi ,  Masahiro Tsuchiya ,  Masayuki Izutsu

发明人： Junichiro Ichikawa ,  Kaoru Higuma ,  Futoshi Yamamoto ,  Satoshi Oikawa ,  Shingo Mori ,  Sunao Kurimura ,  Kenji Kitamura ,  Tetsuya Kawanishi ,  Masahiro Tsuchiya ,  Masayuki Izutsu

IPC分类号： G02F1/035

CPC分类号： G02F1/035 ,  G02F2001/212 ,  G02F2201/18 ,  G02F2202/20

摘要： A nested modulator is provided where the circuit arrangement of modifying electrodes including signal electrodes is simplified, and at the same time, the drive voltage can be lowered.A nested modulator, including: a substrate 20 made of a material having electro-optic effects; an optical waveguide formed on the substrate; and a modulating electrode for modulating light waves which are guided through the optical waveguide, wherein the optical waveguide has a main Mach-Zehnder waveguide 1 and sub-Mach-Zehnder waveguides 2 and 3 provided on two branching waveguides of the main Mach-Zehnder waveguide, and the modulating electrode is provided in a sub-branching waveguide of the sub-Mach-Zehnder waveguides, is characterized in that a polarization reversal region 46 or 47 is formed in a portion of a sub-branching waveguide of each of the sub-Mach-Zehnder waveguides, the modulating electrode is formed of signal electrodes including introduced signal electrodes 40 or 43, branching single electrodes 41 or 44 and lead signal electrodes 42 or 45 as well as ground electrodes for each of sub-Mach-Zehnder waveguides, and the branching signal electrodes which branch from the introduced signal electrode are placed so as to work on two sub-branching waveguides for each of the sub-Mach-Zehnder waveguides.

摘要翻译： 提供了一种嵌入式调制器，其中包括信号电极的修改电极的电路布置被简化，并且同时可以降低驱动电压。 嵌套调制器，包括：由具有电光效应的材料制成的衬底20; 形成在基板上的光波导; 以及用于调制通过光波导引导的光波的调制电极，其中光波导具有设置在主马赫 - 曾德尔波导的两个分支波导上的主马赫 - 曾德尔波导1和副马赫 - 曾德尔波导2 并且所述调制电极设置在所述子马赫 - 曾德尔波导的子分支波导中，其特征在于，在每个所述子马赫 - 曾德尔波导的子分支波导的一部分中形成偏振反转区域46或47， 马赫曾德尔波导，调制电极由包括引入信号电极40或43，分支单电极41或44和引导信号电极42或45以及每个子马赫 - 曾德尔波导的接地电极的信号电极形成，以及 从引入的信号电极分支的分支信号电极被放置成对每个子马赫 - 曾德尔波导的两个子分支波导进行工作。

公开(公告)号：US07421209B2

公开(公告)日：2008-09-02

申请号：US11056395

申请日：2005-02-14

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： H04B10/04

CPC分类号： H04L27/10 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/5563

摘要： An optical wavelength multiplexing frequency shift keying modulation system. The system includes an optical wavelength multiplexing signal acquisition unit for outputting an optical wavelength multiplexing signal. A n optical frequency shift keying modulation unit acquires an optical frequency shift keying signal, including an upper side band signal and a lower side band signal, by performing frequency modulation to the optical wavelength multiplexing signal output from the optical wavelength multiplexing signal acquisition unit. An optical frequency shift keying signal separation unit separates the optical frequency shift keying signal output from the optical frequency shift keying modulation unit into an upper side band signal and a lower side band signal.

摘要翻译： 一种光波长复用频移键控调制方式。 该系统包括用于输出光波长复用信号的光波长复用信号获取单元。 通过对从光波长多路复用信号获取单元输出的光波长复用信号进行频率调制，n个光频移键控调制单元获取包括上边带信号和下边带信号的光频移键控信号。 光频移键控信号分离单元将从光频移键控调制单元输出的光频移键控信号分离为上边带信号和下边带信号。

公开(公告)号：US07106497B2

公开(公告)日：2006-09-12

申请号：US10627782

申请日：2003-07-28

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F2/02

CPC分类号： G02F2/02

摘要： A low-noise optical frequency converter uses a predetermined microwave electric signal to modulate an input light wave and output a light wave that includes a first-order upper-sideband or lower-sideband and a third-order lower-sideband or upper-sideband. The frequency converter modulates a light wave identical to the input light wave with a signal having a frequency that is three times that of the microwave signal, to form a first light wave having a first-order lower-sideband or upper-sideband. The first light wave is mixed with a second light wave having a first-order upper-sideband or lower-sideband and a third-order lower-sideband or upper-sideband, with a phase of the third-order lower-sideband or upper-sideband reversed to a phase of the first light wave, thereby suppressing third-order sidebands.

摘要翻译： 低噪声光频变换器使用预定的微波电信号来调制输入光波并输出包括一阶上边带或下边带和三阶下边带或上边带的光波。 变频器利用具有三倍于微波信号的频率的信号来调制与输入光波相同的光波，以形成具有一级下边带或上边带的第一光波。 第一光波与具有一阶上边带或下边带和三阶下边带或上边带的第二光波混合，具有三阶下边带或上边带的相位， 边带反转到第一光波的相位，从而抑制三阶边带。

公开(公告)号：US07084649B2

公开(公告)日：2006-08-01

申请号：US10721408

申请日：2003-11-26

申请人： Tetsuya Kawanishi ,  Yoshiro Matsuo ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Yoshiro Matsuo ,  Masayuki Izutsu

IPC分类号： G01R31/308 ,  G01R31/28

CPC分类号： G01R31/311

摘要： A method and apparatus are provided that make it possible to speedily measure, and obtain images of, the three-dimensional distribution of electric fields in integrated circuits, using electro-optic sampling. The sampling is performed using a plurality of electric field sensors, each comprising an electro-optic crystal layer, a light-reflecting layer that is in close contact with the electro-optic crystal layer, and a separation layer that is in close contact with the reflection layer, separating the reflection layer from the object to be measured.

摘要翻译： 提供了一种方法和装置，其可以使用电光采样来快速测量和获得集成电路中的电场的三维分布的图像。 使用多个电场传感器进行采样，每个电场传感器包括电光晶体层，与电光晶层紧密接触的光反射层和与该电光晶体层紧密接触的分离层 反射层，将反射层与被测量物体分开。

公开(公告)号：US20050238366A1

公开(公告)日：2005-10-27

申请号：US11103494

申请日：2005-04-12

申请人： Tetsuya Kawanishi ,  Masayuki Izutsu

发明人： Tetsuya Kawanishi ,  Masayuki Izutsu

IPC分类号： G02F1/01 ,  G02F2/02 ,  H04B10/04 ,  H04B10/12

CPC分类号： H04B10/505 ,  H04B10/506

摘要： An apparatus is provided for using modulation signals to optically modulate lightwaves of multiple frequencies, using a single optical modulator. A multiple-wavelength optical modulation apparatus in which with respect to a natural number n that is not higher than a number N of modulation signals that is not lower than a number of input lightwaves, fn is input light component of channel n, Fn is modulation frequency, An is a lower sideband order and Bn is an upper sideband order corresponding to sideband channels generated by modulation, the apparatus comprises: an input filter, an optical modulator and an output filter on a single optical path; A lightwave input through an input filter is reflected between the input filter and an output filter, being modulated during each round trip, and is output via the output or input filter when the light has reached a frequency determined by the output or input filter. The time required for each light component of channel n to make a round trip is an integer multiple of one period of each modulation signal having a frequency Fn (=1/Fn). A light component travelling in one direction is reverse phase modulated when the round-trip time is an odd multiple of one period (=1/Fn), and a light component travelling in both directions is in phase modulated when the time required for the light component to travel both ways is an even multiple of one period (=1/Fn).

摘要翻译： 提供一种使用单个光学调制器来使用调制信号来光学地调制多个频率的光波的装置。 一种多波长光调制装置，其中对于不高于输入光波数的调制信号的数目N的自然数n，fn是通道n的输入光分量，Fn是调制 A为低边带顺序，Bn为对应于通过调制生成的边带通道的上边带次序，该装置包括：单个光路上的输入滤波器，光调制器和输出滤波器; 通过输入滤波器输入的光波被反映在输入滤波器和输出滤波器之间，在每次往返期间被调制，并且当光已经达到由输出或输入滤波器确定的频率时通过输出滤波器输出。 通道n的每个光分量进行往返所需的时间是具有频率Fn（= 1 / F N n N）的每个调制信号的一个周期的整数倍。 当往返时间是一个周期（= 1 / F N）的奇数倍时，在一个方向上行进的光分量被反相调制，并且在两个方向上行进的光分量是同相的 当光分量行进两方面所需的时间是一个周期（= 1 / F）的偶数倍时被调制。

公开(公告)号：US20050213862A1

公开(公告)日：2005-09-29

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： G02F1/035 ,  G02F1/01 ,  G02F1/225 ,  G02F2/00

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： 提供了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 - 曾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：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 。