Wavelength diversity turbulence mitigation method and apparatus for free-space optical communications
AssigneeCiena Corporation
InventorsBrandon Taylor Buscaino, Mohammad Ebrahim Mousa Pasandi, Shahab Oveis Gharan, Michael Reimer
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Abstract
Aspects of the subject disclosure may include, for example, receiving a plurality of modulated optical wavelengths generated from digital input data and unmodulated optical wavelengths. The one or more of the plurality of modulated optical wavelengths undergo an optical operation and are converted into one or more electrical signals. The optical operation increases a signal to noise ratio (SNR) of the one or more electrical signals to exceed an SNR threshold. Additionally, the one or more electrical signals are processed to produce digital output data. Other embodiments are disclosed.
Claims20
A device configured for a wavelength-diverse optical communications link, comprising:
- circuitry configured to perform operations, the operations comprising
- receiving a plurality of modulated optical wavelengths, wherein the plurality of modulated optical wavelengths are generated by a transmitter modem from digital input data and transmitter-side unmodulated optical wavelengths, wherein generating of the plurality of modulated optical wavelengths involves subcarrier multiplexing, and wherein, after the transmitter modem, one or more of the plurality of modulated optical wavelengths undergo at least one optical operation that involves subcarrier selection prior to being transmitted across a turbulent channel,
- converting of the plurality of modulated optical wavelengths into one or more electrical signals, wherein the at least one optical operation ensures a signal to noise ratio (SNR) of the one or more electrical signals exceeds an SNR threshold, and
- processing the one or more electrical signals in a receiver modem to produce digital output data.
A method for a wavelength-diverse optical communications link, comprising:
- receiving a plurality of modulated optical wavelengths, wherein the plurality of modulated optical wavelengths are generated by a transmitter modem from digital input data and unmodulated optical wavelengths, wherein generating of the plurality of modulated optical wavelengths involves subcarrier multiplexing, and wherein, after the transmitter modem, one or more of the plurality of modulated optical wavelengths undergo at least one optical operation that involves subcarrier selection prior to being transmitted across a turbulent channel;
- converting of the plurality of modulated optical wavelengths into one or more electrical signals, wherein the at least one optical operation results in a signal to noise ratio (SNR) of the one or more electrical signals exceeding an SNR threshold;
- and
- processing the one or more electrical signals to produce digital output data.
A system comprising:
- first circuitry configured to generate a plurality of modulated optical wavelengths from digital input data and unmodulated optical wavelengths, wherein generating of the plurality of modulated optical wavelengths involves subcarrier multiplexing, and wherein one or more of the plurality of modulated optical wavelengths undergo at least one optical operation that involves subcarrier selection prior to being transmitted across a turbulent channel;
- and
- second circuitry configured to perform operations including
- receiving a plurality of optical signals from the turbulent channel that correspond the plurality of modulated optical wavelengths transmitted across the turbulent channel,
- converting of the plurality of modulated optical wavelengths into one or more electrical signals, wherein the at least one optical operation increases a signal to noise ratio (SNR) of the one or more electrical signals to exceed an SNR threshold, and
- processing the one or more electrical signals to produce digital output data.
Dependencies are inferred from the claim text.