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1. 发明授权

US5986799A Optical amplifier having an attenuator for attenuating input power to eliminate a surge in an amplified optical signal 失效
标题翻译：具有用于衰减输入功率以消除放大的光信号中的浪涌的衰减器的光放大器
公开(公告)号：US5986799A
公开(公告)日：1999-11-16
申请号：US38143
申请日：1998-03-11
申请人： Hiroyuki Itou , Tsukasa Takahashi
发明人： Hiroyuki Itou , Tsukasa Takahashi
IPC分类号： H01S3/10 , H01S3/06 , H01S3/067 , H01S3/13 , H01S3/131 , H04B10/079 , H04B10/2507 , H04B10/29 , H04B10/293 , H01S3/094 , G02B6/28 , G02F1/39
CPC分类号： H04B10/2912 , H01S3/1301 , H04B10/291 , H01S3/10015 , H04B2210/003
摘要： An optical amplifier prevents generation of an optical surge when an input signal to the optical amplifier is interrupted. A synthesized signal of an input signal light and a pumping light is input to an optical amplifying medium. An input signal light interruption detecting circuit detects an interruption of the input signal light. A variable attenuator element is provided on a signal light input side of the optical amplifying medium so as to attenuate the input signal light. The variable attenuator element is controlled based on an output of the input signal light interruption detecting circuit so that a degree of attenuation of the variable attenuator element is increased when the input signal light is interrupted and the degree of attenuation is gradually decreased when the input signal light returns.
摘要翻译：当光放大器的输入信号被中断时，光放大器防止产生光浪涌。将输入信号光和泵浦光的合成信号输入到光放大介质。输入信号光中断检测电路检测输入信号光的中断。可变衰减元件设置在光放大介质的信号光输入侧，以便衰减输入信号光。可变衰减器元件基于输入信号光中断检测电路的输出进行控制，使得当输入信号光被中断时可变衰减器元件的衰减程度增加，并且当输入信号光返回。

2. 发明授权

US5798857A Auxiliary-signal transmission system 失效
标题翻译：辅助信号传输系统
公开(公告)号：US5798857A
公开(公告)日：1998-08-25
申请号：US786692
申请日：1997-01-22
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/06
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.
摘要翻译：使用掺铒光纤与直接光放大相关联发生的自发发射用辅助信号（例如监控信号）进行调制，用于传输辅助信号。在本发明的第一方面中，光放大器的输出通过可变光带通滤波器，其传输特性根据辅助信号而变化，以调制光放大器输出中包含的自发发射分量。在本发明的第二方面中，光放大器的输出由光分支装置分离为主光信号和部分自发发射。分离的自发发射分量通过通过可变光带通滤波器进行调制，该可变光带通滤波器的传输特性根据辅助信号而变化，然后调制的自发发射分量与主光信号进行波分复用。

3. 发明授权

US5841558A Auxiliary-signal transmission system 失效
公开(公告)号：US5841558A
公开(公告)日：1998-11-24
申请号：US787391
申请日：1997-01-22
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/16
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.

4. 发明授权

US5680246A Optical amplifier and optical transmission apparatus 失效
标题翻译：光放大器和光传输装置
公开(公告)号：US5680246A
公开(公告)日：1997-10-21
申请号：US412290
申请日：1995-03-28
申请人： Tsukasa Takahashi , Hiroyuki Itou , Yuji Tamura , Michikazu Shima , Kazuo Yamane , Yumiko Kawasaki , Keisuke Imai , Yoshinori Ohkuma , Kazuhiro Suzuki , Yasunori Nagakubo , Takashi Tsuda , Yuji Miyaki
发明人： Tsukasa Takahashi , Hiroyuki Itou , Yuji Tamura , Michikazu Shima , Kazuo Yamane , Yumiko Kawasaki , Keisuke Imai , Yoshinori Ohkuma , Kazuhiro Suzuki , Yasunori Nagakubo , Takashi Tsuda , Yuji Miyaki
IPC分类号： H01S3/07 , H01S3/06 , H01S3/067 , H01S3/10 , H01S3/13 , H01S3/131 , H04B10/07 , H04B10/2507 , H04B10/29 , H04B10/293 , H04B10/564 , H04B10/572 , H01S3/00
CPC分类号： H04B10/564 , H01S3/1301 , H04B10/077 , H04B10/07955 , H04B10/2912 , H04B10/2931 , H01S3/06754
摘要： The optical amplifier includes a doped fiber doped with a rare earth element, a pumping light source, means for introducing signal light and pumping light into the doped fiber, detection means for detecting whether or not amplified signal light is included in light outputted from the doped fiber, and means for decreasing the intensity of the pumping light when it is detected that amplified signal light is not included. It can be possible to eliminate an influence of an optical surge arising from a characteristic of the doped fiber.
摘要翻译：光放大器包括掺杂有稀土元素的掺杂光纤，泵浦光源，用于将信号光和泵浦光引入掺杂光纤的装置，用于检测放大信号光是否包含在从掺杂光光纤，以及当检测到不包括放大信号光时降低泵浦光强度的装置。可以消除由掺杂光纤的特性引起的光学浪涌的影响。

5. 发明授权

US5625481A Auxiliary-signal transmission system 失效
标题翻译：辅助信号传输系统
公开(公告)号：US5625481A
公开(公告)日：1997-04-29
申请号：US388357
申请日：1995-02-14
申请人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
发明人： Yuji Tamura , Hiroyuki Itou , Tsukasa Takahashi , Michikazu Shima , Yumiko Kawasaki , Kazuo Yamane
IPC分类号： H04B10/077 , H04B10/29 , H04B10/291 , H04B10/516 , H04B10/61 , H04B10/16 , H01S3/00 , H04B10/02
CPC分类号： H04B10/291 , H04B10/077 , H04B10/2912 , H04B10/2931 , H04B2210/078
摘要： Spontaneous emission occurring in association with direct optical amplification using an erbium-doped optical fiber is modulated with an auxiliary signal, such as a supervisory signal, for transmission of the auxiliary signal. In a first aspect of the invention, the output of an optical amplifier is passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, to modulate the spontaneous emission component contained in the optical amplifier output. In a second aspect of the invention, the output of the optical amplifier is separated by an optical branching device into a main optical signal and part of the spontaneous emission. The separated spontaneous emission component is modulated by being passed through a variable optical band-pass filter whose transmission characteristic is varied in accordance with the auxiliary signal, and then, the modulated spontaneous emission component is wavelength-division multiplexed with the main optical signal.
摘要翻译：使用掺铒光纤与直接光放大相关联发生的自发发射用辅助信号（例如监控信号）进行调制，用于传输辅助信号。在本发明的第一方面中，光放大器的输出通过可变光带通滤波器，其传输特性根据辅助信号而变化，以调制光放大器输出中包含的自发发射分量。在本发明的第二方面中，光放大器的输出由光分支装置分离为主光信号和部分自发发射。分离的自发发射分量通过通过可变光带通滤波器进行调制，该可变光带通滤波器的传输特性根据辅助信号而变化，然后调制的自发发射分量与主光信号进行波分复用。

6. 发明授权

US09929575B2 Electrical apparatus 有权
公开(公告)号：US09929575B2
公开(公告)日：2018-03-27
申请号：US14236327
申请日：2012-08-02
申请人： Daiki Yanagidaira , Tsuyoshi Ohashi , Tsukasa Takahashi
发明人： Daiki Yanagidaira , Tsuyoshi Ohashi , Tsukasa Takahashi
IPC分类号： H02J7/00
CPC分类号： H02J7/0032 , H02J7/0063 , H02J2007/0067 , Y10T307/858
摘要： An electrical apparatus is provided which can reduce, when it is shipped in a state in which a secondary battery is built therein, power consumption before a user starts to use the electrical apparatus first. The electrical apparatus includes a secondary battery, a load which operates by power supplied from the secondary battery, and a switch element disposed between the secondary battery and the load. The switch element remains in an off state until a user starts use of the electrical apparatus.

7. 发明授权

US08401397B2 Optical reception device, optical receiving method, and optical transmission apparatus 有权
标题翻译：光接收装置，光接收方法和光传输装置
公开(公告)号：US08401397B2
公开(公告)日：2013-03-19
申请号：US12623898
申请日：2009-11-23
申请人： Tsukasa Takahashi
发明人： Tsukasa Takahashi
IPC分类号： H04B10/12
CPC分类号： H04B10/25133 , H04B10/672 , H04J14/02 , H04J14/0221 , H04J14/0279
摘要： An optical reception device is provided. The optical reception device includes a filtering unit that receives input light of predetermined power, filters the input light by use of filter characteristics where the degree of attenuation of the power of an optical signal of predetermined frequency is lower than the degree of attenuation of the power of an optical signal of another frequency, and supplies an output light; and a determining unit that compares a value relevant to the power of the output light supplied by the filtering unit, with a threshold, and determines whether the input light contains signal light.
摘要翻译：提供光接收装置。光接收装置包括：接收预定功率的输入光的滤波单元，通过使用预定频率的光信号的功率的衰减程度低于功率衰减程度的滤波器特性对输入光进行滤波的另一频率的光信号，并提供输出光; 以及确定单元，其将与由所述滤波单元提供的输出光的功率相关的值与阈值进行比较，并且确定所述输入光是否包含信号光。

8. 发明授权

US08323530B2 Phosphor for scintillator 失效
标题翻译：荧光粉用于闪烁体
公开(公告)号：US08323530B2
公开(公告)日：2012-12-04
申请号：US13496254
申请日：2010-08-09
申请人： Tsukasa Takahashi , Motoyuki Tanaka , Shunichi Hatamoto , Hiromu Watanabe
发明人： Tsukasa Takahashi , Motoyuki Tanaka , Shunichi Hatamoto , Hiromu Watanabe
IPC分类号： C09K11/08
CPC分类号： C09K11/7701 , C09K11/7713 , G01T1/2023
摘要： Provided is a phosphor for scintillator that can absorb radiation and convert it into visible light, and which has a short fluorescence decay time. The phosphor contains a lutetium sulfide-containing host material and an activator agent ion, for example, a phosphor comprising a composition represented by the general formula (Lu1-xPrx)2S3, or (Lu1-xCex)2S3.
摘要翻译：提供了一种能够吸收辐射并将其转换成可见光并且具有短的荧光衰减时间的闪烁体的荧光体。荧光体含有含镥硫化物的主体材料和活化剂离子，例如含有通式（Lu1-xPrx）2S3表示的组合物或（Lu1-xCex）2S3）的荧光体。

9. 发明授权

US08295709B2 Variable dispersion compensation device 有权
标题翻译：可变色散补偿装置
公开(公告)号：US08295709B2
公开(公告)日：2012-10-23
申请号：US12755254
申请日：2010-04-06
申请人： Kazuhiro Kunimatsu , Tsukasa Takahashi
发明人： Kazuhiro Kunimatsu , Tsukasa Takahashi
IPC分类号： H04B10/12
CPC分类号： H04B10/25133 , H04B10/671
摘要： A dispersion compensation device includes a variable dispersion compensator configured to subject an input optical signal to dispersion compensation, an optical receiver configured to convert an optical signal subjected to dispersion compensation into an electrical signal, recover a clock signal and a received data signal from the electrical signal, and output clock lock information indicating whether the clock signal is locked to the electrical signal, a signal processor configured to output bit error rate information on the received data signal, and a controller configured to variably control a dispersion compensation value of the variable dispersion compensator based on the bit error rate information and the clock lock information.
摘要翻译：色散补偿装置包括可变色散补偿器，被配置为使输入光信号进行色散补偿;光接收器，被配置为将经受色散补偿的光信号转换为电信号，从电信号中恢复时钟信号和接收数据信号信号和输出时钟锁定信息，指示时钟信号是否被锁定到电信号;信号处理器，被配置为输出关于接收到的数据信号的误码率信息;以及控制器，被配置为可变地控制可变色散的色散补偿值补偿器基于误码率信息和时钟锁信息。

10. 发明授权

US08178719B2 Method for producing acrylic acid 有权
标题翻译：制备丙烯酸的方法
公开(公告)号：US08178719B2
公开(公告)日：2012-05-15
申请号：US12586567
申请日：2009-09-24
申请人： Masahide Shima , Tsukasa Takahashi
发明人： Masahide Shima , Tsukasa Takahashi
IPC分类号： C07C51/235 , C07C51/16
CPC分类号： C07C51/235 , C07C45/52 , C07C51/252 , C07C47/22 , C07C57/04
摘要： There is provided a novel process for producing acrylic acid by which acrylic acid can be obtained from a raw material independent of petroleum. The process for producing acrylic acid according to the present invention comprises the steps of: applying a dehydration reaction to glycerol as a raw material in a gas phase; and then applying a gas phase oxidation reaction to a gaseous reaction product formed by the dehydration reaction.
摘要翻译：提供了一种生产丙烯酸的新方法，可以从独立于石油的原料获得丙烯酸。根据本发明的丙烯酸的制备方法包括以下步骤：在甘油作为原料在气相中进行脱水反应; 然后对通过脱水反应形成的气态反应产物进行气相氧化反应。

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