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1. 发明授权

US06377372B1 Circuit for optical WDM apparatus 失效
标题翻译：光学WDM设备电路
公开(公告)号：US06377372B1
公开(公告)日：2002-04-23
申请号：US09200754
申请日：1998-11-30
申请人： Norio Yanagi
发明人： Norio Yanagi
IPC分类号： H04J1402
CPC分类号： H04J14/02 , G02B5/201 , G02B26/002 , G02B26/007
摘要： A optical circuit includes a variable-wavelength optical notch filter having a notch wavelength, which receives optical WDM signals to allow an optical signal of the notch wavelength to be reflected and another optical signal to pass through. A control signal is detected from the optical WDM signals, and the notch wavelength of the variable-wavelength optical notch filter is controlled based on the control signal. The notch wavelength may be determined according to the control signal and is further controlled based on a signal level of a reflected optical signal reflected by the variable-wavelength optical notch filter such that the signal level of the reflected optical signal is maximized.
摘要翻译：光电路包括具有陷波波长的可变波长光陷波滤波器，其接收光WDM信号以允许陷波波长的光信号被反射并且另一光信号通过。从光学WDM信号检测控制信号，并根据控制信号控制可变波长光陷波滤波器的陷波波长。陷波波长可以根据控制信号来确定，并且基于由可变波长光陷波滤波器反射的反射光信号的信号电平进一步被控制，使得反射光信号的信号电平最大化。

2. 发明授权

US06657967B1 Dummy bit elimination device and coding apparatus for FEC code word 失效
标题翻译：用于FEC码字的伪位消除装置和编码装置
公开(公告)号：US06657967B1
公开(公告)日：2003-12-02
申请号：US09285775
申请日：1999-04-05
申请人： Takanori Fujisawa , Kenichi Nomura , Yasushi Hara , Norio Yanagi , Hiroaki Tanaka
发明人： Takanori Fujisawa , Kenichi Nomura , Yasushi Hara , Norio Yanagi , Hiroaki Tanaka
IPC分类号： H04J314
CPC分类号： H04L1/0042 , H04J2203/0089
摘要： A dummy bit elimination device in a coding apparatus for use in a submarine cable system. The dummy bit elimination device has a converter for eliminating only dummy bits from FEC (Forward Error Correction) code. The coding apparatus has an optical-to-electrical signal transducer, a demultiplexer, a coder for generating an FEC code, a multiplexer for multiplexing inputs, and an electrical-to-optical signal transducer. The dummy bit elimination device is inserted between the coder and the multiplexer so that the outputs of the coder are fed to the converter and an outputs of the converter are fed to the multiplexer.
摘要翻译：在海底电缆系统中使用的编码装置中的伪位消除装置。伪比特消除装置具有用于从FEC（前向纠错）码中仅消除伪比特的转换器。编码装置具有光 - 电信号传感器，解复用器，用于产生FEC码的编码器，用于多路复用输入的多路复用器和电 - 光信号传感器。该伪位消除装置被插入在编码器和多路复用器之间，使得编码器的输出被馈送到转换器，并且转换器的输出被馈送到多路复用器。

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