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1. 发明授权

US6109108A Electromagnetic acoustic transducer EMAT and inspection system with EMAR 失效
标题翻译： EMAR电磁声换能器EMAT和检测系统
公开(公告)号：US6109108A
公开(公告)日：2000-08-29
申请号：US939555
申请日：1997-09-29
申请人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
发明人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
IPC分类号： B06B1/04 , G01N29/11 , G01N29/24 , G01N29/44 , G06F3/06 , G01N29/20
CPC分类号： G01N29/48 , B06B1/04 , G01N29/11 , G01N29/2412 , G01N2291/014 , G01N2291/0422 , G01N2291/0423 , G01N2291/101
摘要： An electromagnetic acoustic transducer is provided which includes magnets and a sheet type coil unit. The magnets are permanent magnets or electromagnets to provide a static magnetic field to an object to be inspected. The coil unit includes a pair of spiral or meander coils of an electrically conductive material, sandwiched between upper and middle insulation sheet and middle and lower insulation sheet. The coils are used for transmission and reception, respectively. All the ends of the respective coils extend through throughholes formed through the upper and middle insulation sheets to the surface of the ultrasonic transducer, and are connected to external leads. The ends for earth are commonly connected to form a common ground terminal. The inspection system with the electromagnetic acoustic resonance which is a combination of resonant technique and a non-contact electromagnetic acoustic transducer can accomplish evaluating the absolute value of ultrasonic attenuation. The attenuation is highly sensitive to the accumulated fatigue damage, showing a maximum around 20-30% of the whole life. This system can assess the damage advance and predict the remaining life of metals.
摘要翻译：提供了一种电磁换能器，其包括磁体和片状线圈单元。磁体是永磁体或电磁体，以向被检查物体提供静态磁场。线圈单元包括一对导电材料的螺旋或曲折线圈，夹在中间和中间绝缘片和中间和下部绝缘片之间。线圈分别用于发送和接收。各个线圈的所有端部延伸通过上绝缘片和中间绝缘片形成的通孔到超声波换能器的表面，并且连接到外部引线。地极端部通常连接形成公共接地端子。具有共振技术和非接触电磁换能器组合的电磁声共振检测系统可以实现超声波衰减的绝对值的评估。衰减对累积的疲劳损伤高度敏感，最大值在整个寿命的20-30％左右。该系统可以评估损坏进展并预测金属的剩余寿命。

2. 发明授权

US6038925A Focal type electromagnetic acoustic transducer and flaw detection system and method 失效
标题翻译：焦点型电磁声换能器及探伤系统及方法
公开(公告)号：US6038925A
公开(公告)日：2000-03-21
申请号：US44929
申请日：1998-03-20
申请人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
发明人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
IPC分类号： G01N29/04 , B06B1/02 , B06B1/04 , G01N29/24 , G10K11/34 , H02K3/26 , H02K33/12 , G01N9/24
CPC分类号： G01N29/2412 , B06B1/045 , G01N29/2456 , G10K11/346 , H02K3/26 , H02K33/12 , B06B2201/54
摘要： A focusing electromagnetic acoustic transducer is provided which comprises a pair of meander coils, three insulation sheets and a magnet. The meander coils are formed on both surfaces of one of the insulation sheets to be positioned such that the meander coils are coincident with each other, and they are covered with the other insulation sheets. Each of the meander coils comprises a plurality of coil segments wherein intervals between adjacent coil segments sequentially are varied from one end to the other end. The magnet is positioned above the layers consisting the meander coils and insulation sheets. The coil segments of each meander coil are straight lines in parallel with each others, sector shapes on respective circulars having the same center point, or generally circular shapes having the same center point.
摘要翻译：提供一种聚焦电磁声换能器，其包括一对曲折线圈，三个绝缘片和磁铁。曲折线圈形成在绝缘片之一的两个表面上，以使得曲折线圈彼此重合，并且被其它绝缘片覆盖。每个曲折线圈包括多个线圈段，其中相邻线圈段之间的间隔从一端到另一端依次变化。磁铁位于由曲折线圈和绝缘片组成的层之上。每个曲折线圈的线圈段是彼此平行的直线，各圆形上的扇形形状具有相同的中心点，或者具有相同中心点的大致圆形形状。

3. 发明授权

US5811682A Electromagnetic acoustic transducer EMAT and inspection system with EMAR 失效
标题翻译： EMAR电磁声换能器EMAT和检测系统
公开(公告)号：US5811682A
公开(公告)日：1998-09-22
申请号：US766471
申请日：1996-12-12
申请人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
发明人： Toshihiro Ohtani , Hirotsugu Ogi , Masahiko Hirao
IPC分类号： B06B1/04 , G01N29/11 , G01N29/24 , G01N29/44 , G06F3/06
CPC分类号： G01N29/48 , B06B1/04 , G01N29/11 , G01N29/2412 , G06F3/0601 , G01N2291/014 , G01N2291/0422 , G01N2291/0423 , G01N2291/101 , G01N2291/102 , G06F2003/0692
摘要： An electromagnetic acoustic transducer for magnets and a sheet type coil unit. The magnets are permanent magnets or electromagnets to provide a static magnetic field to an object to be inspected. The coil unit includes a pair of spiral or meander coils of an electrically conductive material, sandwiched between upper and middle insulation sheet and middle and lower insulation sheet. The coils are used for transmission and reception, respectively. All the ends of the respective coils extend through throughholes formed through the upper and middle insulation sheets to the surface of the ultrasonic transducer, and are connected to external leads. The ends for earth are commonly connected to form a common ground terminal. The inspection system with the electromagnetic acoustic resonance which is a combination of resonant technique and a non-contact electromagnetic acoustic transducer can evaluates the absolute value of ultrasonic attenuation. The attenuation is highly sensitive to the accumulated fatigue damage, showing a maximum around 20-30% of the whole life. This system can assess damage and predict the fatigue life of metals.
摘要翻译：一种用于磁体的电磁声换能器和片式线圈单元。磁体是永磁体或电磁体，以向被检查物体提供静态磁场。线圈单元包括一对导电材料的螺旋或曲折线圈，夹在中间和中间绝缘片和中间和下部绝缘片之间。线圈分别用于发送和接收。各个线圈的所有端部延伸通过上绝缘片和中间绝缘片形成的通孔到超声波换能器的表面，并且连接到外部引线。地极端部通常连接形成公共接地端子。具有谐振技术和非接触电磁换能器组合的电磁声共振检测系统可以评估超声波衰减的绝对值。衰减对累积的疲劳损伤高度敏感，最大值在整个寿命的20-30％左右。该系统可以评估损坏并预测金属的疲劳寿命。

4. 发明授权

US09048955B2 Tunable dispersion compensation device, optical reception apparatus, and method for controlling tunable dispersion compensation 有权
标题翻译：可调谐色散补偿装置，光接收装置和用于控制可调色散补偿的方法
公开(公告)号：US09048955B2
公开(公告)日：2015-06-02
申请号：US13488736
申请日：2012-06-05
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H04B10/00 , H04B10/08 , H04B10/12 , H04B10/18 , H04B10/2513 , H04B10/2519 , H04B10/2525
CPC分类号： H04B10/25133 , H04B10/2513 , H04B10/2519 , H04B10/2525 , H04B2210/003
摘要： A tunable dispersion compensation device includes a plurality of tunable dispersion compensators coupled in series, a controller configured to control an amount of chromatic dispersion to be set in each of the plurality of tunable dispersion compensators, and a table including a correspondence relationship between an amount of chromatic dispersion and a wavelength band, for each of the plurality of tunable dispersion compensators, wherein the controller decides an amount of chromatic dispersion to be set in each of the plurality of tunable dispersion compensators, based on a total amount of chromatic dispersion desired for the plurality of tunable dispersion compensators and the correspondence relationship included in the table so that a difference between bandwidths of a first tunable dispersion compensator having the widest wavelength band and a second tunable dispersion compensator having the narrowest wavelength band, among the plurality of tunable dispersion compensators, is within a given range.
摘要翻译：可调色散补偿装置包括串联耦合的多个可调谐色散补偿器，控制器被配置为控制要在多个可调色散补偿器中的每一个中设置的色散量，以及包括在对于多个可调色散补偿器中的每一个，其中所述控制器基于所述多个可调色散补偿器所需的色散的总量来确定要设置在所述多个可调色散补偿器中的每一个中的色散量的色散和波长带多个可调谐色散补偿器和包括在表中的对应关系，使得多个可调色散补偿器中具有最宽波段的第一可调色散补偿器的带宽与具有最窄波段的第二可调色散补偿器之间的差异，是withi 在给定范围内。

5. 发明授权

US08259390B2 Optical amplifier apparatus 有权
标题翻译：光放大器装置
公开(公告)号：US08259390B2
公开(公告)日：2012-09-04
申请号：US12409054
申请日：2009-03-23
申请人： Ryuta Hoshi , Toshihiro Ohtani
发明人： Ryuta Hoshi , Toshihiro Ohtani
IPC分类号： H01S5/00 , H04B10/12
CPC分类号： H01S5/50 , H01S3/005 , H01S3/06754 , H01S3/06758 , H01S3/1305 , H01S3/2316 , H01S5/0683 , H04B10/296
摘要： An optical amplifier apparatus includes an optical amplifier including an amplification medium doped with an active substance, the amplification medium excited in order to amplify light; a semiconductor optical amplifier arranged after the optical amplifier; a driver for supplying a driving current with respect to the semiconductor optical amplifier in order that the semiconductor optical amplifier has an amplification characteristic with respect to an input light, the amplification characteristic including a gain non-saturated region and a gain saturated region; and an input-light level adjuster for adjusting an out put light of the optical amplifier to the input light level of the semiconductor optical amplifier, the input light level being set up between the gain non-saturated region and the gain saturated region.
摘要翻译：一种光放大器装置，包括：光放大器，包括掺杂有活性物质的放大介质，所述放大介质被激发以放大光; 配置在光放大器之后的半导体光放大器; 用于向半导体光放大器提供驱动电流的驱动器，以使得半导体光放大器具有相对于输入光的放大特性，该放大特性包括增益非饱和区和增益饱和区; 以及输入光电平调整器，用于将所述光放大器的输出光调整到所述半导体光放大器的输入光电平，所述输入光电平建立在所述增益不饱和区域和所述增益饱和区域之间。

6. 发明授权

US07813647B2 Chromatic dispersion compensation control method and apparatus 有权
标题翻译：色散补偿控制方法和装置
公开(公告)号：US07813647B2
公开(公告)日：2010-10-12
申请号：US11987900
申请日：2007-12-05
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H04B10/12
CPC分类号： H04B10/25133
摘要： A chromatic dispersion compensation control method for compensating the chromatic dispersion of an optical transmission path with a variable dispersion compensator inserted in the optical transmission path is disclosed. The method includes a transmitter inserting a fixed data sequence in the rewritable area of a transmission data sequence to be transmitted and transmitting the transmission data sequence to the optical transmission path, the fixed data sequence containing alternating 0-1 data formed of alternating 0s and 1s and alternating 0 series-1 series data formed of alternating series of 0s and 1s; and a receiver determining a direction to increase or decrease the dispersion compensation of the variable dispersion compensator based on the number of error occurrences in the alternating 0-1 data and the number of error occurrences in the alternating 0 series-1 series data, and variably controlling the dispersion compensation of the variable dispersion compensator in accordance with the determined direction.
摘要翻译：公开了一种色散补偿控制方法，用于通过插入在光传输路径中的可变色散补偿器来补偿光传输路径的色散。该方法包括：发送器将固定数据序列插入到要发送的发送数据序列的可重写区域中，并将发送数据序列发送到光传输路径，该固定数据序列包含由0和1交替形成的交替0-1数据交替的0s和1s系列交替出现0系列串联数据; 以及接收机，基于交替的0-1数据中的错误发生次数和交替的0系列-1系列数据中的出错次数，确定可变色散补偿器的色散补偿的增加或减小的方向，并且可变地根据确定的方向控制可变色散补偿器的色散补偿。

7. 发明授权

US07324189B2 Light power adjusting method, optical transmitter, and optical receiver 失效
标题翻译：光功率调节方式，光发射机和光接收机
公开(公告)号：US07324189B2
公开(公告)日：2008-01-29
申请号：US11277559
申请日：2006-03-27
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： G01N21/00
CPC分类号： H04B10/2537 , H04B10/0775 , H04B10/0777
摘要： The present invention provides provide a light power adjusting method, an optical transmitter, and an optical receiver suitable for ensuring high data transmission quality by preventing the rapid increase in SBS which occurs when the light power exceeds a predetermined value.The incident light power with which the SBS-induced backward propagating light included in the reflected light returned from the optical transmission line rapidly increases, i.e., the light power threshold is calculated.By setting the power of the light incident on the optical transmission line at a value equal to or smaller than the thus calculated light power threshold, the rapid increase in the SBS-induced backward propagating light, which is a nonlinear phenomenon of the optical fiber, is prevented.
摘要翻译：本发明提供了一种光功率调节方法，光发射机和光接收机，其适用于通过防止当光功率超过预定值时发生的SBS的快速增加来确保高数据传输质量。由光传输线返回的反射光中包含的SBS引起的反向传播光的入射光功率快速增加，即计算光功率阈值。通过将入射到光传输线上的光的功率设定为等于或小于由此计算出的光功率阈值的值，作为光纤的非线性现象的SBS感应的反向传播光的快速增加，被阻止

8. 发明授权

US07251072B2 Optical transmission system 有权
标题翻译：光传输系统
公开(公告)号：US07251072B2
公开(公告)日：2007-07-31
申请号：US10635723
申请日：2003-08-07
申请人： Toshihiro Ohtani , Tsukasa Takahashi , Eiji Ishikawa , Hiroto Ikeda , Hiroyuki Deguchi
发明人： Toshihiro Ohtani , Tsukasa Takahashi , Eiji Ishikawa , Hiroto Ikeda , Hiroyuki Deguchi
IPC分类号： H04B10/17
CPC分类号： H04B10/2937 , H01S3/302 , H04B10/0775 , H04B10/2916 , H04B2210/078 , H04B2210/08
摘要： A reliable optical transmission system with an improved signal control mechanism that avoids abrupt power variations of light beams, thereby preventing optical supervisory channel (OSC) signals from experiencing errors. An optical amplifier amplifies main signals under the control of an optical amplifier controller, which spends a first predetermined time to raise the output power of the optical amplifier up to a desired level. A pump light source produces a pump beam for injection to a fiber-optic transmission line so as to make it serve as an amplifying medium. The pump light source is controlled by a pump light source controller that spends a second predetermined time to raise the pump beam to a desired power level. This stepwise start-up process of the amplifier power and pump beam power prevents OSC signals from experiencing abrupt power variations.
摘要翻译：一种具有改进的信号控制机制的可靠的光传输系统，其避免了光束的突然功率变化，从而防止光监控信道（OSC）信号经历错误。光放大器在光放大器控制器的控制下放大主信号，光放大器控制器花费第一预定时间将光放大器的输出功率提高到期望的水平。泵浦光源产生用于注射到光纤传输线的泵浦光束，以使其用作放大介质。泵浦光源由泵浦光源控制器控制，泵控制器花费第二预定时间将泵浦光束升高到期望的功率水平。放大器功率和泵浦波束功率的逐步启动过程防止OSC信号经历突然的功率变化。

9. 发明授权

US08326160B2 Dispersion compensation device, optical reception device, method for dispersion compensation, and method for optical reception 有权
标题翻译：色散补偿装置，光接收装置，色散补偿方法和光接收方法
公开(公告)号：US08326160B2
公开(公告)日：2012-12-04
申请号：US12951643
申请日：2010-11-22
申请人： Makoto Murakami , Toshihiro Ohtani
发明人： Makoto Murakami , Toshihiro Ohtani
IPC分类号： H04B10/06 , H04B10/00 , H04B10/12 , H04J14/02
CPC分类号： H04B10/25133 , H04B2210/252
摘要： A dispersion compensation device includes: an optical branching unit to branch an optical signal to be received; a first dispersion compensator to perform dispersion compensation on one part of the optical signal branched by the optical branching unit with a variable compensation amount; a second dispersion compensator to perform dispersion compensation on another part of the optical signal branched by the optical branching unit; a monitoring unit to monitor the communication quality of an output optical signal of the second dispersion compensator; and a controlling unit to determine the direction of variation in chromatic dispersion of the optical signal based on the direction of variation in communication quality monitored by the monitoring unit and control the compensation amount of the first dispersion compensator based on the result of the determination.
摘要翻译：色散补偿装置包括：光分支单元，用于分支待接收的光信号; 第一色散补偿器，对具有可变补偿量的光分支单元分支的光信号的一部分进行色散补偿; 第二色散补偿器，对由光分支单元分支的光信号的另一部分进行色散补偿; 监视单元，用于监视第二色散补偿器的输出光信号的通信质量; 以及控制单元，其基于由所述监视单元监视的通信质量的变化方向来确定所述光信号的色散的变化方向，并且基于所述确定的结果来控制所述第一色散补偿器的补偿量。

10. 发明授权

US08131159B2 Transmission apparatus and optical transmission apparatus 有权
标题翻译：传输装置和光传输装置
公开(公告)号：US08131159B2
公开(公告)日：2012-03-06
申请号：US12457051
申请日：2009-05-29
申请人： Toshihiro Ohtani
发明人： Toshihiro Ohtani
IPC分类号： H04B10/04
CPC分类号： H04B10/2942
摘要： In a transmission apparatus, a monitor unit monitors a signal level and generates a monitored value; a level control unit controls the level of the input signal in accordance with the monitored value; an output amplification unit amplifies and outputs the level-controlled signal; and a control unit controls unit operation statuses in accordance with setting information. The control unit recognizes the period of duration of a single level in the input signal, from the signal format given by the setting information, and performs variable control of at least one of a monitor time constant, a response time from the signal input to the monitor unit until the generation of the monitored value, and a level setting time constant, a response time from the input of the monitored value to the level control unit until the execution of level control, in accordance with the period of duration of the single level.
摘要翻译：在发送装置中，监视单元监视信号电平并产生监视值; 电平控制单元根据监视值控制输入信号的电平; 输出放大单元放大并输出电平控制信号; 并且控制单元根据设置信息控制单元操作状态。控制单元根据由设定信息给出的信号格式来识别输入信号中的单个电平的持续时间，并且执行监视时间常数，从输入信号到信号的响应时间中的至少一个的可变控制监视单元，直到监视值的产生，以及电平设定时间常数，从监视值的输入到电平控制单元的响应时间，直到执行电平控制，根据单级持续时间。

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