Adaptive Optical Signal Processing for Dispersion Penalties
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Solution Overview
Problem
Existing optical signal processing techniques struggle to adapt to rapid changes in transmission parameters in time-division multiplexed optical signals across multiple channels in shared optical access networks, leading to penalties such as modal, polarization, and chromatic dispersion, especially when increasing network range beyond 20 km.
Innovation Solution
A method that utilizes a transmission schedule to retrieve performance parameters for each time sector, calculating correction parameters to adaptively process the composite optical signal, allowing for precise and efficient correction of transmission penalties across multiple channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical signal processing techniques are used to correct transmission penalties, then signal quality is improved, but the device cannot adapt quickly enough to changing transmission parameters in time-division multiplexed signals
Solution Approach 1:
The patent segments the time multiplexed optical signal into distinct time sectors, each associated with a specific transmission channel. By retrieving channel-specific performance parameters for each time sector from a transmission schedule, the system can apply targeted correction parameters to each segment, enabling rapid adaptation to changing transmission conditions without requiring the entire system to relearn parameters slowly over time.
2Length of stationary object
If transmission range is increased beyond 20 km, then network coverage is improved, but transmission penalties such as modal, polarization, and chromatic dispersion increase
Solution Approach 1:
The patent implements preliminary action by retrieving channel performance parameters and calculating correction parameters in advance for each time sector based on the transmission schedule. This allows the system to pre-compensate for transmission penalties that will occur over extended transmission distances, enabling reliable operation beyond 20 km by addressing dispersion and other penalties before they degrade the signal.
3Measurement precision
If adaptive processing parameters are calculated for each time sector, then correction precision is improved, but computational complexity and resource consumption increase
Solution Approach 1:
The patent merges the retrieval of channel performance parameters with the calculation of correction parameters in an integrated process. By combining these operations and utilizing the transmission schedule structure, the system achieves precise per-time-sector correction while minimizing redundant computations and optimizing resource utilization, thus reducing overall computational complexity despite the detailed per-sector processing.
Data Source
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AI summary
The invention relates to a composite optical signal processing method composed of a sequence of time segments obtained through time division multiplex of a plurality of optical signals transmitted on a plurality of transmission channels of a shared optical network access. According to the invention, the said process is characterized in that it comprises the following steps: considering an emission calendar of the said plurality of optical signals in the said access network, the said calendar associating to a time segment an optical segment and a communication channel used by the said optical signal; recovery of a set of representative performance parameters of the said transmission channel associated to the said time segment; and adaptive correction of the time segment with a set of parameters.