System and method of telecommunication with wavelength division multiplexing comprising a demultiplexer
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United States of America Patent
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Sep 25, 2001
Grant Date -
N/A
app pub date -
Jan 13, 1998
filing date -
Jan 15, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Method of optical telecommunication comprising the phases of generating at least two optical transmission signals, at mutually different preset wavelengths separated by a preset distance; multiplexing the said optical signals by wavelength division in a single transmission fiber, forming a multi-wavelength optical signal comprising the said optical transmission signals; transmitting the said multi-wavelength optical signal through the said optical fiber to a receiving station comprising at least two receivers; selecting at least one of the said optical transmission signals from the said multi-wavelength optical signal; feeding the said filtered optical signal to the respective receiver; characterized in that before the said phase of selecting at least one of the said optical transmission signals it further comprises the phases of eliminating from the said multi-wavelength optical signal, at least one signal with wavelength different from the wavelength of the said at least one selected optical transmission signal.
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