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21. 发明授权

US06804433B2 Optical pulse pattern generator 失效
标题翻译：光脉冲图案发生器
公开(公告)号：US06804433B2
公开(公告)日：2004-10-12
申请号：US10335990
申请日：2003-01-03
申请人： Koichi Takiguchi , Tomohiro Shibata
发明人： Koichi Takiguchi , Tomohiro Shibata
IPC分类号： G02B626
CPC分类号： H04B10/503 , G02F3/00 , G02F2203/70 , H04B10/508
摘要： An optical pulse pattern generator can generate optical pulse signals with various periods and patterns. It supplies an optical pulse from an optical pulse source to a variable optical delay line circuit including cascade-connected characteristic-variable asymmetrical Mach-Zehnder interferometers via an optical combiner and splitter. The optical pulse is fed back to the optical combiner and splitter from the final stages of the cascade-connected characteristic-variable a symmetrical Mach-Zehnder interferometers via an optical exclusive OR circuit and optical amplifier. Making directional couplers with variable coupling ratio, and directional couplers with variable coupling ratio in operation can cause the final stage of the cascade-connected characteristic-variable asymmetrical Mach-Zehnder interferometer to produce a random pulse train.
摘要翻译：光脉冲图案发生器可以产生具有各种周期和图案的光脉冲信号。它通过光学组合器和分离器将光脉冲源的光脉冲提供给包括级联连接的特征可变非对称马赫 - 曾德干涉仪的可变光学延迟线电路。光脉冲通过光学异或电路和光放大器从级联连接的特征变量的对称马赫 - 曾德干涉仪的最后级反馈到光合并器和分路器。制造具有可变耦合比的定向耦合器和具有可变耦合比的定向耦合器可以导致级联连接的特征变量不对称马赫 - 曾德干涉仪的最后阶段产生随机脉冲串。

22. 发明授权

US06711313B2 CDMA encoder-decoder, CDMA communication system, WDM-CDMA communication system 失效
标题翻译： CDMA编码解码器，CDMA通信系统，WDM-CDMA通信系统
公开(公告)号：US06711313B2
公开(公告)日：2004-03-23
申请号：US09753565
申请日：2001-01-04
申请人： Koichi Takiguchi , Katsunari Okamoto , Tomohiro Shibata , Masao Kato , Takashi Goh
发明人： Koichi Takiguchi , Katsunari Okamoto , Tomohiro Shibata , Masao Kato , Takashi Goh
IPC分类号： G02B626
CPC分类号： G02B6/12021 , G02B6/2861 , H04J14/005 , H04J14/02
摘要： An optical CDMA encoder-decoder is constructed by combining arrayed-waveguide gratings, matrix optical switches, and delay lines, otherwise by combining arrayed-waveguide grating and variable delay lines, thus providing an encoding process that a wavelength change with respect to time in optical pulses. The light includes a wide spectrum band width inserted into a CDMA encoder/decoder and is demultiplexed by arrayed-waveguide gratings. Each wave length according to the demultiplexed spectrum component spreads out in the time region based on delay time differences produced by delay lines having differential optical lengths. Thus, in CDMA, the dependency of wavelengths on delay time can be set arbitrarily.
摘要翻译：通过组合阵列波导光栅，矩阵光开关和延迟线，否则通过组合阵列波导光栅和可变延迟线来构造光CDMA编码器 - 解码器，从而提供编码过程，其中波长相对于时间在光学中的变化脉冲。该光包括插入到CDMA编码器/解码器中的宽谱带宽度，并通过阵列波导光栅解复用。根据解复用的频谱分量的每个波长基于由具有差分光学长度的延迟线产生的延迟时间差在时间区域中扩展。因此，在CDMA中，波长对延迟时间的依赖性可以任意设定。

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