Dummy-light generation device, optical transmission system, and dummy-light generation method
AssigneeNEC Corporation
InventorTatsuya Yamazaki
Life of this patent
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Abstract
The dummy-light generation device includes an ASE light source that generates ASE light, and a spectrum processing circuit that generates dummy light transmitted together with signal light by processing a spectrum of the ASE light, and the spectrum processing circuit processes the spectrum of the ASE light in advance in such a way that a spectrum of the dummy light and a spectrum of the signal light can be distinguished from each other on at least one of a frequency axis and a time axis on a reception side.
Claims18
A dummy-light generation device comprising:
- an amplified spontaneous emission (ASE) light source configured to generate ASE light;
- and
- a spectrum processing unit configured to extract, from a spectrum of the ASE light, a wavelength band including no signal light and generate dummy light, wherein:
- the signal light includes carriers that are assigned to slots, and
- the spectrum processing unit is configured to process a spectrum of the dummy light in advance in such a way that, in a mixed spectrum including the dummy light and the signal light, the dummy light and the signal light can be, for each slot, distinguished from each other on at least one of a frequency axis and a time axis.
An optical transmission system comprising:
- a dummy-light generation device comprising:
- an amplified spontaneous emission (ASE) light source configured to generate ASE light;
- and
- a spectrum processing unit configured to extract, from a spectrum of the ASE light, a wavelength band including no signal light and generate dummy light, wherein:
- the signal light includes carriers that a assigned to slots, and
- the spectrum processing unit is configured to process a spectrum of the dummy light in advance in such a way that, in a mixed spectrum including the dummy light and the signal light, the dummy light and the signal light can be, for each slot distinguished from each other on at least one of a frequency axis and a time axis;
- and
- an optical receiver configured to extract information for distinguishing the signal light and the dummy light from each other from a spectrum difference in received light including the dummy light and the signal light.
A dummy-light generation method comprising:
- generating amplified spontaneous emission (ASE) light;
- and
- extracting, from a spectrum of the ASE light, a wavelength band including no signal light and generating dummy light, wherein:
- the signal light includes carriers that are assigned to slots, and
- a spectrum of the dummy light is processed in advance in such a way that, in a mixed spectrum including the dummy light and the signal light, the dummy light and the signal light are, for each slot, distinguished from each other on at least one of a frequency axis and a time axis.
Dependencies are inferred from the claim text.