Optical communications – Transmitter and receiver system – Including synchronization
Reexamination Certificate
2005-09-13
2005-09-13
Sedighian, M. R. (Department: 2633)
Optical communications
Transmitter and receiver system
Including synchronization
C398S155000, C398S027000
Reexamination Certificate
active
06944405
ABSTRACT:
This invention provides an optical transmission with a demultiplexer for demultiplexing an input optical signal into optical signals of different channels and a multiplexer for multiplexing the optical signals outputted from the demultiplexer. The optical cross-connect device includes: N BICDR (Bit Rate Independent Clock and Data Recovery) receivers each for receiving the associated optical signals outputted from the demultiplexer, for converting the associated optical signal into an electrical signal and reproducing clocks and data based on the bit rate of the electrical signal; a switchboard with a cross-connect switch for receiving output signals from the respective N BICDR receiver; N bit rate discriminating units for receiving the output signals from the N BICDR receivers, respectively, thereby outputting bit rate discriminating signals associated with the N BICDR receivers, respectively; a temperature sensing unit for outputting a temperature sensing signal; and, a central processing unit for receiving the bit rate discriminating signals from the N bit rate discriminating unit, along with the temperature sensing signal from the temperature sensing unit, for compensating each of the received bit rate discriminating signals with a temperature-dependent bit rate value read out, based on the temperature sensing signal, from a memory, and for controlling the bit rate of the associated BICDR receiver based on the compensated bit rate.
REFERENCES:
patent: 6549572 (2003-04-01), Anderson et al.
patent: 2001/0046076 (2001-11-01), Kim et al.
patent: 2003/0161635 (2003-08-01), Milton et al.
Hwang Seong-Taek
Kim Byung-Jik
Koh Jun-Ho
Lee Han-Lim
Oh Yun-Je
Cha & Reiter L.L.C.
Curs Nathan
Samsung Electronics Co,. Ltd.
Sedighian M. R.
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