Optical Signal Processing for Beyond 100G Transmission
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Solution Overview
Problem
Beyond 100G optical networks face transmission performance degradation due to high baud rates and complex engineering requirements, with existing OTN systems unable to actively adjust optical signal transmission performance when fiber links or path indices change.
Innovation Solution
An optical signal processing method that acquires an OSNR value from an optical receiving unit, adjusts filtering parameters of a shaping filter in the optical transmission unit, and adjusts the spectrum waveform of the optical signal to optimize transmission performance by using a spectrum shaping adjustment parameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-order modulation technologies (QPSK, QAM) are used to increase baud rate, then transmission capacity is improved, but transmission performance degrades and engineering design complexity increases
Solution Approach 1:
The patent implements dynamic adjustment of spectrum shaping filter parameters based on real-time OSNR feedback. The system continuously monitors optical signal quality and adapts the filtering characteristics to maintain optimal transmission performance under varying conditions, resolving the contradiction between high baud rate operation and transmission reliability
Solution Approach 2:
The system changes the filtering parameters of the spectrum shaping filter dynamically according to OSNR values. By adjusting these parameters in response to signal quality measurements, the system maintains transmission performance while operating at high baud rates required for increased capacity
2Productivity
If baud rate is increased for beyond 100G transmission, then transmission capacity is improved, but requirements for optical fiber links become more stringent and system complexity increases
Solution Approach 1:
The system performs self-optimization by automatically adjusting spectrum shaping filter parameters based on feedback from OSNR measurements. This self-service mechanism eliminates the need for complex manual engineering design and checking calculations, allowing the system to adapt to fiber link conditions automatically
Solution Approach 2:
The patent implements a feedback loop where the optical receiving unit measures OSNR and feeds this information back to the control unit, which then adjusts the spectrum shaping filter parameters accordingly. This closed-loop feedback system simplifies engineering design by enabling automatic adaptation rather than requiring complex pre-calibration
3Device complexity
If OTN system only passively generates alarms when performance degradation occurs, then system simplicity is maintained, but transmission performance cannot be actively optimized
Solution Approach 1:
The system transitions from passive alarm generation to active performance optimization through feedback-based control. The optical receiving unit continuously monitors OSNR and feeds this information back to dynamically adjust spectrum shaping filter parameters, enabling real-time transmission performance optimization while maintaining relatively simple system architecture
Solution Approach 2:
The patent replaces the mechanical/passive alarm system with an automated control system that uses electronic feedback loops to actively optimize transmission performance. The control unit automatically adjusts filter parameters based on OSNR measurements, substituting manual or passive responses with automated active optimization
Data Source
AI summary
An optical signal processing method, a control unit, an optical transmission unit and a storage medium are disclosed. The optical signal processing method includes: acquiring an OSNR value from an optical receiving unit (S100); acquiring a spectrum shaping adjustment parameter according to the OSNR value (S200); and sending the spectrum shaping adjustment parameter to an optical transmission unit to adjust a filtering parameter of a shaping filter of the optical transmission unit, so that the optical transmission unit adjusts a spectrum waveform of an optical signal by utilizing the shaping filter after adjustment (S300).