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    • 24. 发明授权
    • Optical amplifier
    • 光放大器
    • US06236500B1
    • 2001-05-22
    • US09338794
    • 1999-06-23
    • Mikiya SuzukiToshio NakamuraAkira SasakiShigeru Shikii
    • Mikiya SuzukiToshio NakamuraAkira SasakiShigeru Shikii
    • H01S300
    • H04B10/294H01S3/06754H01S3/06758H01S3/2383H04B2210/258H04J14/0221
    • There is provided an optical amplifier for reducing the optical output power difference and/or obtaining high output power across a wide wavelength band. The optical amplifier comprises a plurality of optical amplifier units connected in two or more stages. At least one of the optical amplifier units comprises a first optical component of a single input and N outputs that has an optical-demultiplexing function, and P units of optical amplification means for the individual amplification of light that is output from P (where 1≦P≦N) output terminals selected from the N (integer) output terminals of the first optical component. Second optical components are provided to the input side of the first optical component or between the output side of the first optical component and the input side of the optical amplification means. The second optical components are optical components having chromatic dispersion compensation functions, optical components having functions designed to compensate for wavelength dependency output power difference, or optical components demonstrating other required effects. The optical components are DCFs, FBGs, SMFs, optical filters, attenuators, or the like. The second optical components are provided nonselectively or selectively.
    • 提供了一种用于减小光输出功率差和/或在宽波段上获得高输出功率的光放大器。 光放大器包括以两级或更多级连接的多个光放大器单元。 光放大器单元中的至少一个包括单输入的第一光学部件和具有光解复用功能的N个输出,以及用于从P输出的光的单独放大的光放大装置的P单元(其中, = P <= N)个输出端子,从第一光学部件的N(整数)输出端子中选择。 第二光学部件被提供到第一光学部件的输入侧或者在第一光学部件的输出侧和光学放大装置的输入侧之间。 第二光学部件是具有色散补偿功能的光学部件,具有被设计为补偿波长依赖性输出功率差的功能的光学部件,或表现出其它所需效果的光学部件。 光学部件是DCF,FBG,SMF,光学滤波器,衰减器等。 非选择性地或选择地提供第二光学部件。
    • 25. 发明授权
    • Automobile exhaust noise silencer
    • 汽车排噪声消声器
    • US06173808B1
    • 2001-01-16
    • US08857071
    • 1997-05-15
    • Kazushige MaedaAkira SasakiTakao KubozukaHaruki Yashiro
    • Kazushige MaedaAkira SasakiTakao KubozukaHaruki Yashiro
    • F01N100
    • F01N1/084F01N1/02F01N1/166F01N1/24F01N2210/04F01N2490/155
    • An expansion chamber, and first and second volume chambers on either side of said expansion chamber, are formed inside a muffler housing. Engine exhaust is led by an inlet tube to the first volume chamber, and an opening facing the expansion chamber is formed in an intermediate part of the inlet tube. Exhaust in the second volume chamber is discharged outside by a tail tube, and an opening is formed facing the expansion chamber in an intermediate part of the tail tube. A valve is provided for leading exhaust from the first volume chamber to the second volume chamber according to a pressure difference between the chambers. This forms two exhaust flowpaths. A resonance system with two degrees of freedom is thereby formed with respect to exhaust discharged via the two openings and the expansion chamber, and a high noise silencing efficiency is obtained.
    • 膨胀室和位于所述膨胀室两侧的第一和第二容积室形成在消声器壳体的内部。 发动机排气通过入口管引导到第一容积室,并且面向膨胀室的开口形成在入口管的中间部分中。 第二容积室中的排气通过尾管排出到外部,并且在尾管的中间部分中形成面向膨胀室的开口。 提供阀,用于根据室之间的压力差将排气从第一容积室引导到第二容积室。 这形成两个排气流路。 因此,通过两个开口和膨胀室排出的排气形成具有两个自由度的共振系统,并获得高噪声消音效率。