System and method for mitigating four-wave-mixing effects
First Claim
1. A system comprising:
- at least one tone generator operable to generate a plurality of modulation tones comprising;
a first modulation tone having a first modulation frequency; and
a second modulation tone having a second modulation frequency that is different from the first modulation frequency;
a plurality of transmitters operable to generate a plurality of modulated optical signals using the plurality of modulation tones and a plurality of information signals, each optical signal comprising a primary frequency, the plurality of modulated optical signals comprising;
a first modulated optical signal generated using the first modulation tone; and
a second modulated optical signal generated using the second modulation tone; and
a wavelength multiplexer operable to multiplex the plurality of modulated optical signals into a single optical fiber;
wherein;
frequencies of a first plurality of four-wave mixing (FWM) products caused by the first modulation tone are at least a predefined distance away from any of the primary frequencies of the plurality of optical signals; and
frequencies of a second plurality of FWM products caused by the second modulation tone are at least the predefined distance away from any of the primary frequencies of the plurality of optical signals.
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Abstract
In one embodiment, a system includes at least one tone generator, a first transmitter, and a second transmitter. The at least one tone generator is operable to generate a plurality of modulation tones comprising at least a first modulation tone having a first tone frequency and a second modulation tone having a second tone frequency that is different from the first tone frequency. The first transmitter is operable to apply the first modulation tone to a first optical signal such that at least a portion of the first optical signal is divided into one or more sidebands. The second transmitter is operable to apply the second modulation tone to a second optical signal such that at least a portion of the second optical signal is divided into one or more sidebands.
73 Citations
19 Claims
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1. A system comprising:
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at least one tone generator operable to generate a plurality of modulation tones comprising; a first modulation tone having a first modulation frequency; and a second modulation tone having a second modulation frequency that is different from the first modulation frequency; a plurality of transmitters operable to generate a plurality of modulated optical signals using the plurality of modulation tones and a plurality of information signals, each optical signal comprising a primary frequency, the plurality of modulated optical signals comprising; a first modulated optical signal generated using the first modulation tone; and a second modulated optical signal generated using the second modulation tone; and a wavelength multiplexer operable to multiplex the plurality of modulated optical signals into a single optical fiber; wherein; frequencies of a first plurality of four-wave mixing (FWM) products caused by the first modulation tone are at least a predefined distance away from any of the primary frequencies of the plurality of optical signals; and frequencies of a second plurality of FWM products caused by the second modulation tone are at least the predefined distance away from any of the primary frequencies of the plurality of optical signals. - View Dependent Claims (2, 3, 4, 18, 19)
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5. A method comprising:
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receiving a plurality of modulation tones from at least one tone generator, the plurality of modulation tones comprising; a first modulation tone having a first modulation frequency; and a second modulation tone having a second modulation frequency that is different from the first modulation frequency; and generating a plurality of modulated optical signals using the plurality of modulation tones and a plurality of information signals, each optical signal comprising a primary frequency, the plurality of modulated optical signals comprising; a first modulated optical signal generated using the first modulation tone; and a second modulated optical signal generated using the second modulation tone; wherein; frequencies of a first plurality of four-wave mixing (FWM) products caused by the first modulation tone are at least a predefined distance away from any of the primary frequencies of the plurality of optical signals; and frequencies of a second plurality of FWM products caused by the second modulation tone are at least the predefined distance away from any of the primary frequencies of the plurality of optical signals. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A system comprising:
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at least one tone generator operable to generate a plurality of modulation tones comprising; a first modulation tone having a first modulation frequency; and a second modulation tone having a second modulation frequency that is different from the first modulation frequency; and a plurality of transmitters operable to generate a plurality of modulated optical signals using the plurality of modulation tones and a plurality of information signals, each optical signal comprising a primary frequency, the plurality of modulated optical signals comprising; a first modulated optical signal generated using the first modulation tone; and a second modulated optical signal generated using the second modulation tone; wherein; frequencies of a first plurality of four-wave mixing (FWM) products caused by the first modulation tone are at least a predefined distance away from any of the primary frequencies of the plurality of optical signals; and frequencies of a second plurality of FWM products caused by the second modulation tone are at least the predefined distance away from any of the primary frequencies of the plurality of optical signals. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification