Optical: systems and elements – Deflection using a moving element – Using a periodically moving element
Patent
1996-06-14
1999-06-29
Negash, Kinfe-Michael
Optical: systems and elements
Deflection using a moving element
Using a periodically moving element
359158, H04J 1408
Patent
active
059176270
ABSTRACT:
In an optical TDM transmission system in which a set of N tributary channels at one bit rate are multiplexed on to a single multiplexed channel at N times the bit rate of the tributary channels, an amplitude modulation with a fundamental frequency matched to a subharmonic of the tributary bit rate is impressed on the multiplexed signal. At the demultiplexer this modulation is detected to provide a clock for separating the tributary channels in a manner which directs specific tributary channels to specific outputs without having to have recourse to reading any of the transmitted data itself.
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Negash Kinfe-Michael
Northern Telecom Limited
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