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1. 发明专利

JP2001077752A DEVICE AND METHOD FOR LIGHT WAVELENGTH MULTIPLEXING 失效
公开(公告)号：JP2001077752A
公开(公告)日：2001-03-23
申请号：JP25372699
申请日：1999-09-08
申请人： NEC CORP , MIYAGI NIPPON DENKI KK
发明人： SHINODA MINORU , SHIRAGAKI TATSUYA , WATANABE TAKESHI
IPC分类号： H04B10/556 , H04B10/07 , H04B10/2507 , H04B10/299 , H04J3/00 , H04J3/06 , H04L7/02 , H04B10/00
摘要： PROBLEM TO BE SOLVED: To provide a light wavelength multiplexing device wherein IP router being a client and a light wavelength multiplexing device are subjected to a high-accuracy synchronizing source by wavelengths through a function for making them subordinate to a timing source for from outside. SOLUTION: An optoelectric converter 21-1 of each of transmitters 2-1 to 2-3 terminates from a light input signal from an IP router, etc., and a timing extractor 22-1 extracts a timing signal from a receive signal. A selector 23-1 selects and outputs one of the extracted timing signal and a timing signal from an external timing input terminal 5. A timing synchronizer 24-1 synchronizes the terminated transmit signal with the timing of the selector 23-1 and an electrooptic converter 24-1 converts the transmit signal to a light wavelength signal which is different by transmitters. A light wavelength multiplexer 3 multiples and transmits the light signals from the transmitters 2-1 to 2-3 to an optical transmission line 100.

2. 发明专利

JP2964984B2 失效
公开(公告)号：JP2964984B2
公开(公告)日：1999-10-18
申请号：JP8508597
申请日：1997-04-03
申请人： NIPPON DENKI KK
发明人： SHIRAGAKI TATSUYA
IPC分类号： G02F1/313 , G02F1/31 , G02F2/02 , H04Q11/00 , H04Q11/02
摘要： An optical switch device includes an integrated space switch section and a wavelength switch section which reduces, a packaging volume and cost. The optical switch device includes a plurality of multi-functional wavelength converters. One of these converters includes a wavelength converter 121, in which an input terminal and an output terminal are connected to optical divider 131 and opticalcoupler 141, respectively, is operated as the wavelength converter only when a current flows through a semiconductor optical amplifier in the wavelength converter. When the current does not flow through the amplifier, the light is not outputted. By turning on/off the current flowing through the semiconductor optical amplifier in the wavelength converter, wavelength converter 121 can functions as a gate switch. The switch device has both of a wavelength conversion function and a space switch function. Wavelength converters 121-123 connected to one optical divider 131 are connected to different opticalcouplers 141-143, respectively, whereby the device can also have a wavelength multiplexing function.

4. 发明专利

JP2937232B2 失效
公开(公告)号：JP2937232B2
公开(公告)日：1999-08-23
申请号：JP12418596
申请日：1996-05-20
申请人： NIPPON DENKI KK
发明人： SHIRAGAKI TATSUYA
IPC分类号： H04B10/03 , H04B1/74 , H04B10/032 , H04B10/038 , H04B10/077 , H04B10/291 , H04J3/14 , H04J14/02 , H04J14/08 , H04L1/22 , H04L12/28 , H04L12/43 , H04L12/437 , H04Q3/00 , H04Q11/00 , H04B10/02

5. 发明专利

JP2928046B2 失效
公开(公告)号：JP2928046B2
公开(公告)日：1999-07-28
申请号：JP8901393
申请日：1993-04-16
申请人： NIPPON DENKI KK
发明人： SHIRAGAKI TATSUYA
IPC分类号： H04J14/00 , H04B10/03 , H04B10/032 , H04B10/077 , H04B10/27 , H04J14/02 , H04Q3/00 , H04Q3/52 , H04Q11/00 , H04B10/02

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