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公开(公告)号：US08577225B2
公开(公告)日：2013-11-05
申请号：US12935252
申请日：2009-03-25
申请人： Masahito Mure , Norikazu Miyazaki , Toshio Kataoka , Kaoru Higuma
发明人： Masahito Mure , Norikazu Miyazaki , Toshio Kataoka , Kaoru Higuma
CPC分类号： H04B10/677
摘要： Provided is an optical receiver which accurately demodulates an optical signal obtained by the differential phase shift modulation method. The optical receiver includes: an interferometer which branches the inputted optical signal into two parts and gives a one-bit phase difference to the resultant two optical signals so that the two optical signals after addition of the phase difference are made to interfere each other to output two output lights; reflection means which reflects one of the output lights from the interferometer so as to return to the interferometer; detection means which detects the return light which has been reflected by the reflection means and propagates through the interferometer in the different direction from the inputted optical signal, for output; and phase difference control means which adjusts the phase difference given by the interferometer according to the intensity of the return light detected by the detection means.
摘要翻译： 提供了一种能够对由差分相移调制方法获得的光信号进行精确解调的光接收机。 光接收机包括：干涉仪，其将输入的光信号分成两部分，并给出所得到的两个光信号的一位相位差，使得相加后的两个光信号相互干扰以输出 两路输出灯; 反射装置，其反射来自干涉仪的输出光之一以返回到干涉仪; 检测装置，其检测已经被反射装置反射的返回光，并且沿与所输入的光信号不同的方向通过干涉仪传播; 以及相位差控制装置，其根据由检测装置检测到的返回光的强度来调整由干涉仪给出的相位差。
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公开(公告)号：US20120301158A1
公开(公告)日：2012-11-29
申请号：US13576531
申请日：2010-02-01
申请人： Masahito Mure , Kaoru Higuma , Toshio Kataoka , Norikazu Miyazaki , Masahide Miyachi , Youichi Oikawa , Noriyasu Shiga , Hiroshi Nagaeda
发明人： Masahito Mure , Kaoru Higuma , Toshio Kataoka , Norikazu Miyazaki , Masahide Miyachi , Youichi Oikawa , Noriyasu Shiga , Hiroshi Nagaeda
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： An optical receiver includes interference means 2 for branching the optical signal modulated in a DQPSK manner into two light beams, delaying at least one branched light beam so that two branched light beams have a predetermined phase difference, rotating the polarization plane of at least one branched light beam so that the polarization planes of the two branched light beams are orthogonal to each other, and coupling the two branched light beams, light separation adjusting means 3 to 5 for separating the output light beam from the interference means and adjusting the polarization planes of the separated light beams, and detection means 6 and 6′ for detecting light intensities of the separated light beams output from the light separation adjusting means, wherein an I-component signal and a Q-component signal are generated on the basis of detection signals from the detection means.
摘要翻译： 光接收机包括干扰装置2，用于将以DQPSK方式调制的光信号分支成两个光束，延迟至少一个分支光束，使得两个分支光束具有预定的相位差，旋转至少一个分支的偏振面 光束使得两个分支光束的偏振平面彼此正交，并且耦合两个分支光束，光分离调节装置3至5，用于将输出光束与干涉装置分离并调整偏振面 分离的光束，以及用于检测从光分离调节装置输出的分离的光束的光强度的检测装置6和6'，其中基于来自光分离调节装置的检测信号产生I分量信号和Q分量信号 检测装置。
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公开(公告)号：US20110075149A1
公开(公告)日：2011-03-31
申请号：US12935252
申请日：2009-03-25
申请人： Masahito Mure , Norikazu Miyazaki , Toshio Kataoka , Kaoru Higuma
发明人： Masahito Mure , Norikazu Miyazaki , Toshio Kataoka , Kaoru Higuma
IPC分类号： G01B9/02
CPC分类号： H04B10/677
摘要： Provided is an optical receiver which accurately demodulates an optical signal obtained by the differential phase shift modulation method. The optical receiver includes: an interferometer which branches the inputted optical signal into two parts and gives a one-bit phase difference to the resultant two optical signals so that the two optical signals after addition of the phase difference are made to interfere each other to output two output lights; reflection means which reflects one of the output lights from the interferometer so as to return to the interferometer; detection means which detects the return light which has been reflected by the reflection means and propagates through the interferometer in the different direction from the inputted optical signal, for output; and phase difference control means which adjusts the phase difference given by the interferometer according to the intensity of the return light detected by the detection means.
摘要翻译： 提供了一种能够对由差分相移调制方法获得的光信号进行精确解调的光接收机。 光接收机包括：干涉仪，其将输入的光信号分成两部分，并给出所得到的两个光信号的一位相位差，使得相加后的两个光信号相互干扰以输出 两路输出灯; 反射装置，其反射来自干涉仪的输出光之一以返回到干涉仪; 检测装置，其检测已经被反射装置反射的返回光，并且沿与所输入的光信号不同的方向通过干涉仪传播; 以及相位差控制装置，其根据由检测装置检测到的返回光的强度来调整由干涉仪给出的相位差。
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公开(公告)号：US07899338B2
公开(公告)日：2011-03-01
申请号：US10550770
申请日：2004-03-26
IPC分类号： H04B10/04 , H04B10/121
CPC分类号： G02F1/0327 , G02F1/0123 , G02F1/035 , G02F1/225 , G02F2201/58
摘要： A method and device for adequately controlling the DC bias of each of the optical modulating sections of an optical modulator even while the optical modulator is operating in normal mode and even with a simple structure. An optical modulator bias controller (B) for controlling the DC bias of each optical modulating section of an optical modulator (1) is characterized by comprising DC bias application means (3) for applying a DC bias to each of the optical modulating sections, a low-frequency signal superimposing circuit (2) for superimposing a low-frequency signal fB with a specific frequency on a modulating signal b applied to each optical modulating section, optical sensing means (9) for sensing a change of the intensity of the light wave passing through the combining section, and bias control means (4) for extracting the change of the intensity of light corresponding to the low-frequency signal from the optical sensing means and controlling the DC bias application means according to the extracted change of the intensity of light.
摘要翻译： 即使在光调制器以正常模式操作并且甚至具有简单结构的情况下也可以充分地控制光调制器的每个光调制部分的DC偏置的方法和装置。 用于控制光调制器（1）的每个光调制部分的DC偏压的光调制器偏置控制器（B）的特征在于包括用于向每个光调制部分施加DC偏压的DC偏压施加装置（3） 低频信号叠加电路（2），用于将具有特定频率的低频信号fB叠加到施加到每个光调制部分的调制信号b上;光检测装置（9），用于感测光波强度的变化 通过组合部分，以及用于从光学感测装置中提取与低频信号相对应的光强变化的偏压控制装置（4），并根据提取的光强度变化对DC偏压施加装置进行控制 光。
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公开(公告)号：US07751724B2
公开(公告)日：2010-07-06
申请号：US11624887
申请日：2007-01-19
IPC分类号： H04B10/04
CPC分类号： G02F1/2255 , H04B10/505 , H04B10/5053 , H04B10/5165
摘要： An optical modulator is provided which includes: an optical splitting part that splits an input light wave into two light waves; two optical waveguides that propagate the two light waves into which the input light wave is split, respectively; a first SSB modulating part that is provided in one of the two optical waveguides and modulates a light wave, which propagates into the first SSB modulating part, with a carrier frequency so that the light wave is converted into a different light wave having a single side band; a second SSB modulating part that is provided in the other of the two optical waveguides and modulates a light wave, which propagates into the second SSB modulating part, with a data signal in order to generate a signal light wave having a different single side band; and an optical combining part that combines the light wave modulated by the first SSB modulating part with the signal light wave generated by the second SSB modulating part.
摘要翻译： 提供了一种光调制器，其包括：将输入光波分成两个光波的光分裂部分; 分别传播输入光波被分裂成的两个光波的两个光波导; 设置在两个光波导中的一个中的第一SSB调制部分，以载波频率调制传播到第一SSB调制部分的光波，使得光波被转换为具有单侧的不同光波 带; 设置在所述两个光波导中的另一个中的第二SSB调制部分，并且利用数据信号调制传播到所述第二SSB调制部分的光波，以产生具有不同单边带的信号光波; 以及光合成部，其将由第一SSB调制部调制的光波与由第二SSB调制部生成的信号光波组合。
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公开(公告)号：US06218658B1
公开(公告)日：2001-04-17
申请号：US09271302
申请日：1999-03-17
IPC分类号： H01J4014
CPC分类号： G02F1/3525 , G02B6/264 , G02B6/3845 , G02F1/35
摘要： The optical fuse of the present invention comprises: at least one light heatable portion for receiving an incident beam, and at least one thermally sensitive degradable portion with transparency and reflectivity, positioned in contact with the light heatable portion. The light heatable portion contains a light heatable material which generates heat depending on a specified light intensity of the incident beam. The thermally sensitive degradable portion contains a thermally sensitive degradable material which loses or reduces its transparency and reflectivity, depending on the heat generated by the light heatable portion when the light intensity of the incident beam exceeds a threshold value.
摘要翻译： 本发明的光熔丝包括：用于接收入射光束的至少一个光可加热部分和具有透明度和反射率的至少一个具有透光性和反射性的热敏可降解部分，与光可加热部分接触。 光可加热部分包含根据入射光束的规定光强度产生热量的轻质可加热材料。 热敏可降解部分包含热敏可降解材料，其当入射光束的光强度超过阈值时，根据由可热加热部分产生的热量而损失或降低其透明度和反射率。
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公开(公告)号：US20110052212A1
公开(公告)日：2011-03-03
申请号：US12661884
申请日：2010-03-25
申请人： Masahito Mure , Masahide Miyachi , Kaoru Higuma , Norikazu Miyazaki , Toshio Kataoka , Hiroyuki Sato , Hiroshi Nagaeda , Noriyasu Shiga , Yoichi Oikawa
发明人： Masahito Mure , Masahide Miyachi , Kaoru Higuma , Norikazu Miyazaki , Toshio Kataoka , Hiroyuki Sato , Hiroshi Nagaeda , Noriyasu Shiga , Yoichi Oikawa
IPC分类号： H04B10/06
CPC分类号： H04B10/677
摘要： The present invention relates to an optical receiver, and particularly, to an optical receiver by which a DQPSK-modulated optical signal is demodulated to a multilevel phase-modulated signal.
摘要翻译： 光接收机技术领域本发明涉及一种光接收机，特别涉及将DQPSK调制光信号解调为多电平相位调制信号的光接收机。
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公开(公告)号：US07768696B2
公开(公告)日：2010-08-03
申请号：US11547342
申请日：2005-03-24
申请人： Kaoru Higuma , Junichiro Ichikawa , Shingo Mori
发明人： Kaoru Higuma , Junichiro Ichikawa , Shingo Mori
CPC分类号： G02F1/3534 , G02F1/011 , G02F1/225 , G02F2203/13
摘要： The present invention purposes to provide a THz-wave generator capable of generating a THz-wave stably and efficiently, and particularly, to provide the THz-wave generator which is stable against a frequency shift of a laser source and which can easily vary the frequency of the THz-wave.A THz-wave generator, for inputting a laser beam from a light source unit A including a laser source to a THz-wave generating element D, and generating a THz-wave (fT) from the THz-wave generating element, wherein a light circulating unit including an SSB optical modulator, and wavelength selecting means C are disposed between the laser source A and the THz-wave generating element D, the laser beam is guided into the light circulating unit, a specific wavelength lightwave is selected out of lightwaves having a plurality of wavelengths generated in the light circulating unit by the wavelength selecting means, and the specific wavelength (f0, fn) lightwave is input to the THz-wave generating element.
摘要翻译： 本发明的目的是提供一种能够稳定有效地产生太赫兹波的太赫兹波发生器，特别是为了提供对于激光源的频移稳定的THz波发生器，并且可以容易地改变频率 的太赫兹波。 一种太赫兹波发生器，用于将包括激光源的光源单元A的激光束输入到太赫兹波发生元件D，并从所述THz波发生元件产生THz波（fT），其中，光 包括SSB光调制器的循环单元和波长选择装置C设置在激光源A和THz波发生元件D之间，激光束被引导到光循环单元中，从具有波长选择装置C的光波中选出特定波长的光波， 通过波长选择装置在光循环单元中产生的多个波长和特定波长（f0，fn）光波被输入到THz波发生元件。
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公开(公告)号：US20080267565A1
公开(公告)日：2008-10-30
申请号：US11628572
申请日：2005-06-01
IPC分类号： G02B6/42
CPC分类号： G02F1/035 , G02F1/3136 , G02F1/3137 , G02F2001/212 , G02F2201/16 , G02F2201/34 , G02F2203/50
摘要： The invention provides tunable delay or resonator devices in an electro optical substrate. Signals in at least one waveguide in the electro optical substrate pass through Y-junction reflectors which direct signals from one branch of the waveguide back into another branch of the waveguide. A coupled delay or resonator approximated loop is presented in an embodiment of the invention with opposing Y-junction reflectors. In other embodiments of the invention, a delay ladder is provided with selectable levels of delay from multiple outputs.
摘要翻译： 本发明在电光学衬底中提供可调延迟或谐振器装置。 在电光学衬底中的至少一个波导中的信号通过Y形结反射器，其将信号从波导的一个分支引导回到波导的另一分支。 耦合延迟或谐振器近似环在本发明的具有相对的Y结反射器的实施例中呈现。 在本发明的其它实施例中，向多个输出端提供延迟梯形图，其具有可选择的延迟级别。
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公开(公告)号：US20050220385A1
公开(公告)日：2005-10-06
申请号：US11085609
申请日：2005-03-22
申请人： Tetsuya Kawanishi , Masayuki Izutsu , Kaoru Higuma , Shingo Mori
发明人： Tetsuya Kawanishi , Masayuki Izutsu , Kaoru Higuma , Shingo Mori
CPC分类号： G02F1/3136 , G02F1/0123 , G02F1/035 , G02F1/225 , G02F2001/212
摘要： An optical SSB modulator capable of appropriately adjusting a phase difference of light in the MZ waveguides and automatically adjusting a voltage impressed to the bias adjustment electrodes is provided. The above-mentioned object is achieved by an optical SSB modulator (1) provided with a first sub Mach-Zehnder waveguide (MZA) (2), a second sub Mach-Zehnder waveguide (MZB) (3), a main Mach-Zehnder waveguide (MZC) (4), a first bias adjustment electrode (DCA electrode) (5), a second bias adjustment electrode (DCB electrode) (6), a first modulation electrode (RFA electrode) (7), a second modulation electrode (RFB electrode) (8) and a third bias adjustment electrode (DCC electrode) (9), wherein either one of or both of output portions (10, 11) of the MZA and the MZB have an X-branching form, and specifically having one of light paths of the X-branching connected to a photodetector.
摘要翻译： 提供一种能够适当地调整MZ波导中的光的相位差并自动调节施加到偏置调节电极的电压的光学SSB调制器。 上述目的通过一种光学SSB调制器（1）来实现，所述光学SSB调制器（1）设置有第一子马赫 - 曾德尔波导（MZ）和第二子马赫 - 曾德尔波导（MZ＆lt; SUB＆amp; （3），主马赫 - 曾德尔波导（MZ）C（4），第一偏置调节电极（DCA电极）（ 5），第二偏置调整电极（DCB电极）（6），第一调制电极（RFA电极）（7），第二调制电极（RF B电极）（8）和第三偏置调整电极（DC电极）（9），其中，输出部分（10,11）中的任一个或两个 MZA A和MZ B B具有X分支形式，并且具体地将X分支的光路中的一个连接到光电检测器。
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