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    • 12. 发明授权
    • Optical transmission apparatus
    • 光传输装置
    • US07139117B2
    • 2006-11-21
    • US10793099
    • 2004-03-05
    • Eisuke NakamuraMakoto MurakamiKiyotoshi Noheji
    • Eisuke NakamuraMakoto MurakamiKiyotoshi Noheji
    • H01S4/00H04B10/12
    • H04B10/2942H04B10/2916
    • An optical transmission apparatus that improves optical transmission quality by performing an optical noise correction and optical level detection with great precision. A first optical amplifier performs optical amplification with an optical fiber transmission line as an amplification medium. A second optical amplifier inputs second excitation light into an amplification medium in which an active substance for optical amplification is doped to perform optical amplification. A first optical level detector monitors, before transmitting an optical signal, a level of optical noise scattered by the first optical amplifier by emitting first excitation light in an operating environment and detects an optical level at the time of transmitting the optical signal by subtracting the level of the optical noise from a signal amplified by the first optical amplifier. A second optical level detector monitors, before transmitting an optical signal, a level of optical noise emitted from the second optical amplifier by emitting the second excitation light in the operating environment and detects an optical level at the time of transmitting the optical signal by subtracting the level of the optical noise from a signal amplified by the second optical amplifier.
    • 一种通过以高精度执行光学噪声校正和光学水平检测来提高光传输质量的光传输装置。 第一光放大器利用光纤传输线作为放大介质进行光放大。 第二光放大器将第二激发光输入到其中掺杂用于光放大的活性物质进行光放大的放大介质中。 第一光学电平检测器在发送光信号之前,通过在操作环境中发射第一激发光来监测由第一光放大器散射的光噪声水平,并且通过减去光信号的发送时检测光电平 的来自由第一光放大器放大的信号的光噪声。 第二光学电平检测器在发送光信号之前通过在操作环境中发射第二激发光来监测从第二光放大器发射的光噪声水平,并通过减去光信号的发送来检测光电平 来自由第二光放大器放大的信号的光噪声的电平。
    • 17. 发明授权
    • Method of canceling noise contained in received signal
    • 消除接收信号中包含的噪声的方法
    • US08412140B2
    • 2013-04-02
    • US12950477
    • 2010-11-19
    • Makoto Murakami
    • Makoto Murakami
    • H04B1/10H04B17/00
    • H04B1/28H04B1/0007
    • A multiplication section multiplies a signal output from a GPS antenna by a local oscillation signal generated by a local oscillation signal generation section to down-convert the signal output from the GPS antenna into an intermediate-frequency signal. A sampling circuit section samples a generated signal generated by a portable electronic circuit using a sampling clock signal having a frequency lower than a frequency of the generated signal. An attenuation section generates a cancellation signal by attenuating the sampled signal, and an addition section adds the cancellation signal to the signal output from the multiplication section to cancel in-band noise superimposed on the received signal.
    • 乘法部分将由GPS天线输出的信号乘以由本地振荡信号产生部分产生的本地振荡信号,以将从GPS天线输出的信号下变频为中频信号。 采样电路部分使用具有低于所产生的信号的频率的频率的采样时钟信号来对由便携式电子电路产生的生成信号进行采样。 衰减部通过衰减采样信号来产生消除信号,并且加法部分将抵消信号与从乘法部分输出的信号相加以消除叠加在接收信号上的带内噪声。
    • 18. 发明授权
    • Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids
    • 在液体中生产金属和金属合金纳米粒子,具有高重复率超快脉冲激光烧蚀
    • US08246714B2
    • 2012-08-21
    • US12320617
    • 2009-01-30
    • Bing LiuZhendong HuMakoto MurakamiYong Che
    • Bing LiuZhendong HuMakoto MurakamiYong Che
    • B22F9/02B22F9/04
    • B02C19/18B01J13/0043B01J19/121B22F1/0022B22F9/04B22F2999/00B82Y30/00B22F2202/11
    • Various embodiments include a method of producing chemically pure and stably dispersed metal and metal-alloy nanoparticle colloids with ultrafast pulsed laser ablation. A method comprises irradiating a metal or metal alloy target submerged in a liquid with ultrashort laser pulses at a high repetition rate, cooling a portion of the liquid that includes an irradiated region, and collecting nanoparticles produced with the laser irradiation and liquid cooling. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beams, a metal or metal alloy target submerged in a liquid, and a liquid circulating system to cool the laser focal volume and collect the nanoparticle products. By controlling various laser parameters, and with optional liquid flow movement, the method provides stable colloids of dispersed metal and metal-alloy nanoparticles. In various embodiments additional stabilizing chemical agents are not required.
    • 各种实施方案包括用超快速脉冲激光烧蚀制备化学纯的和稳定分散的金属和金属合金纳米颗粒胶体的方法。 一种方法包括以高重复率以超短激光脉冲辐射淹没在液体中的金属或金属合金靶,冷却包括辐射区域的液体的一部分,以及收集通过激光照射和液体冷却产生的纳米颗粒。 该方法可以用高重复率超快脉冲激光源,用于聚焦和移动脉冲激光束的光学系统,浸没在液体中的金属或金属合金靶和液体循环系统来实现,以冷却激光聚焦体积, 收集纳米颗粒产品。 通过控制各种激光参数,并具有可选的液流运动,该方法提供分散金属和金属合金纳米粒子的稳定胶体。 在各种实施方案中,不需要另外的稳定化学试剂。
    • 19. 发明授权
    • Method of canceling noise contained in received signal
    • 消除接收信号中包含的噪声的方法
    • US07860475B2
    • 2010-12-28
    • US11959088
    • 2007-12-18
    • Makoto Murakami
    • Makoto Murakami
    • H04B1/10H04B17/00
    • H04B1/28H04B1/0007
    • A multiplication section multiplies a signal output from a GPS antenna by a local oscillation signal generated by a local oscillation signal generation section to down-convert the signal output from the GPS antenna into an intermediate-frequency signal. A sampling circuit section samples a generated signal generated by a portable electronic circuit using a sampling clock signal having a frequency lower than a frequency of the generated signal. An attenuation section generates a cancellation signal by attenuating the sampled signal, and an addition section adds the cancellation signal to the signal output from the multiplication section to cancel in-band noise superimposed on the received signal.
    • 乘法部分将由GPS天线输出的信号乘以由本地振荡信号产生部分产生的本地振荡信号,以将从GPS天线输出的信号下变频为中频信号。 采样电路部分使用具有低于所产生的信号的频率的频率的采样时钟信号来对由便携式电子电路产生的生成信号进行采样。 衰减部通过衰减采样信号来产生消除信号,并且加法部分将抵消信号与从乘法部分输出的信号相加以消除叠加在接收信号上的带内噪声。
    • 20. 发明申请
    • Production of metal and metal-alloy nanoparticles with high repetition rate ultrafast pulsed laser ablation in liquids
    • 在液体中生产金属和金属合金纳米粒子,具有高重复率超快脉冲激光烧蚀
    • US20100196192A1
    • 2010-08-05
    • US12320617
    • 2009-01-30
    • Bing LiuZhendong HuMakoto MurakamiYong Che
    • Bing LiuZhendong HuMakoto MurakamiYong Che
    • C22C5/04B22F9/04B23K26/08C22C5/02C22C5/06C22C9/00B01F3/12
    • B02C19/18B01J13/0043B01J19/121B22F1/0022B22F9/04B22F2999/00B82Y30/00B22F2202/11
    • Various embodiments include a method of producing chemically pure and stably dispersed metal and metal-alloy nanoparticle colloids with ultrafast pulsed laser ablation. A method comprises irradiating a metal or metal alloy target submerged in a liquid with ultrashort laser pulses at a high repetition rate, cooling a portion of the liquid that includes an irradiated region, and collecting nanoparticles produced with the laser irradiation and liquid cooling. The method may be implemented with a high repetition rate ultrafast pulsed laser source, an optical system for focusing and moving the pulsed laser beams, a metal or metal alloy target submerged in a liquid, and a liquid circulating system to cool the laser focal volume and collect the nanoparticle products. By controlling various laser parameters, and with optional liquid flow movement, the method provides stable colloids of dispersed metal and metal-alloy nanoparticles. In various embodiments additional stabilizing chemical agents are not required.
    • 各种实施方案包括用超快速脉冲激光烧蚀制备化学纯的和稳定分散的金属和金属合金纳米颗粒胶体的方法。 一种方法包括以高重复率以超短激光脉冲辐射淹没在液体中的金属或金属合金靶,冷却包括辐射区域的液体的一部分,以及收集通过激光照射和液体冷却产生的纳米颗粒。 该方法可以用高重复率超快脉冲激光源,用于聚焦和移动脉冲激光束的光学系统,浸没在液体中的金属或金属合金靶和液体循环系统来实现,以冷却激光聚焦体积, 收集纳米颗粒产品。 通过控制各种激光参数,并具有可选的液流运动,该方法提供分散金属和金属合金纳米粒子的稳定胶体。 在各种实施方案中,不需要另外的稳定化学试剂。