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公开(公告)号：EP1294118A4
公开(公告)日：2007-11-21
申请号：EP00964732
申请日：2000-10-06
发明人： KATAYAMA MASATOSHI
CPC分类号： H04J14/0282 , H04J14/0226 , H04J14/0232 , H04J14/0234 , H04J14/0246 , H04J14/025 , H04N7/08 , H04N7/22 , H04N21/238 , H04N21/4382
摘要： Subscriber units are connected to a station unit through an optical fiber. The station unit multiplexes a video signal and signals except for the video signal to distribute the multiplexed signal to a plurality of the subscriber units. Each subscriber unit separates the received signal, and comprises a wavelength multiple separating section which removes the signal having a specific wavelength.
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2.发明公开OPTICAL TRANSMISSION/RECEPTION MODULE AND METHOD FOR MANUFACTURING OPTICAL TRANSMISSION/RECEPTION MODULE 审中-公开光发射/接收模块及其制造方法的光传输/接收模块
公开(公告)号：EP2439569A4
公开(公告)日：2014-03-19
申请号：EP09845481
申请日：2009-07-09
发明人： OMURA TAMON , OHATA NOBUO , KATAYAMA MASATOSHI
CPC分类号： G02B6/29361 , G02B6/2938 , G02B6/4215 , G02B6/4246
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公开(公告)号：EP2472747A4
公开(公告)日：2015-05-06
申请号：EP10811409
申请日：2010-04-28
发明人： SENOO KENJI , NODA MASAKI , YAMANAKA SHIGEO , KATAYAMA MASATOSHI
IPC分类号： H04B10/50 , H04B10/60 , H04B10/079 , H04B10/272 , H04B10/40 , H04B10/564
摘要： A subscriber-side optical network unit (ONU) has a control LSI (10) for outputting a data signal and a pre-bias signal at fixed intervals, an optical transmitter-receiver (30) for producing optical output in response to these signals, and a light-emission error preventing circuit (20) for preventing light-emission error. First and second light-emission error detecting circuits (21) and (22) output an abnormality detection alarm signal when no rising edge occurs in the data signal and pre-bias signal for a prescribed period of time. An OR element (23), when receiving the abnormality detection alarm signal from at least one of the first and second light-emission error detecting circuits (21) and (22), supplies the optical transmitter-receiver (30) with a shutdown signal and halts the optical output.
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