Optical transmission system using four-wave mixing
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United States of America Patent
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Jul 31, 2012
Grant Date -
Dec 31, 2009
app pub date -
Jun 11, 2009
filing date -
Jun 26, 2008
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical transmission system based on four-wave mixing and configured in a WDM-PON topology where a signal light between an optical line terminal and each of optical network units is multiplexed and demultiplexed at a WDM. The optical line terminal transmits downlink signal light having wavelengths λd1, . . . , λdN and pumping lights having wavelengths λp1, . . . , λpN which are different by a predetermined wavelength difference Δλ from the wavelengths of the downlink signal lights. Each of the optical network units demultiplexes the downlink signal lights to receive a portion of the downlink signal lights, generates an uplink signal light to be transmitted from each of the optical network unit to the optical line terminal by using a portion of the downlink signal lights and the four-wave mixing from the pumping lights, and outputs a modulated uplink signal light.
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