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1. 发明授权

US5260823A Erbium-doped fibre amplifier with shaped spectral gain 失效
标题翻译：具有形状光谱增益的掺铒光纤放大器
公开(公告)号：US5260823A
公开(公告)日：1993-11-09
申请号：US10478
申请日：1993-01-28
申请人： David N. Payne , Richard I. Laming , Paul R. Morkel , Masao Tachibana
发明人： David N. Payne , Richard I. Laming , Paul R. Morkel , Masao Tachibana
IPC分类号： H01S3/063 , H01S3/067 , H01S3/10 , H04B10/17 , H01S3/06 , G02B6/26
CPC分类号： H04B10/2941 , H01S3/10023 , H01S2301/04 , H01S3/0632 , H01S3/0635 , H01S3/0675
摘要： The spectral-gain characteristics of an erbium-doped fibre amplifier have been tailored by incorporating a gain-shaping-filter within the amplifier. The filter is chosen to modify the natural gain spectrum of the amplifier so as to suppress the gain peak and thus flatten the overall spectral-gain profile. Because the amplifier is distributed, it is possible to insert one or more filters along the length of the fibre. It is shown that there are considerable advantages to locating the filter within the length of the amplifier, rather than at the end, which is the more obvious choice. Advantages are that the amplifier pump efficiency is almost unaffected and the output saturation power is similar to that of the unshaped amplifier. In addition, the flat spectral gain provides an amplifier ideally-suited for use at a number of signal wavelengths, as required for wavelength-division multiplexing (WDM). The invention therefore comprises both the concept of filtering to shape the gain response of the amplifier and the recognition that this can be achieved without penalty by careful location of one or more filters along the length of the amplifier.
摘要翻译：掺铒光纤放大器的光谱增益特性已经通过在放大器内并入增益整形滤波器而被定制。选择滤波器来修改放大器的自然增益谱，以抑制增益峰值，从而使整个频谱增益曲线变平。因为放大器是分布式的，所以可以沿着光纤的长度插入一个或多个滤波器。已经表明，将滤波器放置在放大器的长度内而不是结束处具有相当大的优点，这是更明显的选择。优点是放大器泵效率几乎不受影响，输出饱和功率类似于未放大的放大器。另外，平坦频谱增益提供了理想地适用于波分复用（WDM）所需的多个信号波长的放大器。因此，本发明包括滤波以形成放大器的增益响应的概念以及通过沿放大器的长度仔细定位一个或多个滤波器可以实现这一点的识别。

2. 发明授权

US4985287A Light-stabilized, vinyl chloride resin body 失效
标题翻译：光稳定氯乙烯树脂体
公开(公告)号：US4985287A
公开(公告)日：1991-01-15
申请号：US369996
申请日：1989-06-23
申请人： Masao Tachibana
发明人： Masao Tachibana
IPC分类号： B29C47/00 , B29K27/06 , B29L31/10 , C08K3/22 , C08K9/00 , C08K9/04 , C08L27/00 , C08L27/06
CPC分类号： C08K3/22 , C08K9/04 , Y10T428/1314 , Y10T428/1372 , Y10T428/2927 , Y10T428/2991
摘要： A light-stabilized plastic article is disclosed which includes a shaped body of a vinyl chloride resin, and finely divided particles of a metal oxide capable of screening ultraviolet rays and dispersed in the shaped body, each of the particles being coated with a layer of an anion surfactant.

3. 发明授权

US4970189A Porous, metal-containing carbonaceous material 失效
标题翻译：多孔含金属的含碳材料
公开(公告)号：US4970189A
公开(公告)日：1990-11-13
申请号：US370020
申请日：1989-06-23
申请人： Masao Tachibana
发明人： Masao Tachibana
IPC分类号： C01B31/30 , B01J20/20 , C01B31/02 , C04B35/528 , C04B35/74 , C04B38/00 , C22C1/10
CPC分类号： C04B35/528 , C04B35/74 , C04B38/0022 , C04B38/009
摘要： A porous, metal-containing carbonaceous material is disclosed which comprises a porous, carbonaceous body, and fine particles of a metal having an average particle size of 1 .mu.m or less and dispersed in the carbonaceous body. The carbonaceous material may be obtained by a method including the steps of: (a) providing finely divided particles of a metal oxide having an average particle size of 1 .mu.m or less; (b) mixing the particles with an organic substance to obtain a mixture; and (c) carbonizing the mixture in a non-oxidizing atmosphere to convert the organic substance into a porous carbonaceous body and to convert the metal oxide particles into elemental metal particles dispersed in the carbonaceous body.

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