Wavelength-division multiplexing telecommunication system and method providing a controlled separation of the output channels
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United States of America Patent
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Aug 11, 1998
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N/A
app pub date -
Jul 3, 1996
filing date -
Jul 31, 1995
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Abstract
A multi-wavelength optical telecommunication method includes: generating at least two optical transmission signals of wavelengths different from each other, multiplexing the optical signals in a single transmission fibre, forming a multi-wavelength optical signal, transmitting, through the transmission fibre, the multi-wavelength optical signal including the optical transmission signals to a respective receiving station and separating the optical transmission signals, in which the step of separating the optical transmission signals includes: distributing the received multi-wavelength optical signal onto at least two output fibres; selectively reflecting a wavelength band of the multi-wavelength optical signal including at least one of the optical transmission signals, so that the reflected band propagates over the output fibre in an opposite direction to the multi-wavelength optical signal; separating the reflected band from the output fibre and feeding it, through a receiving fibre, to a respective receiver.
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