In-band Supervisory Data Modulation via Complementary Power
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Solution Overview
Problem
In optical communication networks, existing methods struggle to efficiently modulate supervisory data without interfering with main data and maintaining constant signal power, especially at high-speed symbol rates.
Innovation Solution
The method involves complementary power modulation by increasing the power level of one polarization component and decreasing the power level of an orthogonal polarization component of an optical signal based on supervisory data, ensuring the total power remains constant, allowing for in-band transmission of supervisory data without affecting the main data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If supervisory data is modulated onto the optical signal using conventional methods, then the supervisory data can be transmitted, but it interferes with the main data transmission and causes power variations
Solution Approach 1:
The optical signal is segmented into two orthogonal polarization components. Supervisory data is modulated by varying the power distribution between these two polarization components rather than varying the total power. This segmentation allows independent control of each polarization component, enabling supervisory data transmission without interfering with main data transmission in the other polarization component.
Solution Approach 2:
The invention changes the modulation parameter from total optical power to differential polarization power. By maintaining constant total power and only varying the power difference between orthogonal polarization components, the system achieves supervisory data modulation without causing power variations that would interfere with main data transmission.
2Adaptability or versatility
If additional optical components are added for supervisory data modulation, then supervisory data transmission capability is improved, but device complexity increases
Solution Approach 1:
The existing dual-polarization optical signal structure is made multi-functional. The same optical signal that carries main data in one polarization component also carries supervisory data through power variations in the orthogonal polarization component. This universal use of existing infrastructure eliminates the need for separate supervisory data transmission hardware.
Solution Approach 2:
The optical signal itself provides the mechanism for supervisory data transmission through its inherent polarization properties. The system uses the existing polarization diversity of the optical signal to encode supervisory data, making the signal self-sufficient for dual purposes without requiring external assistance from additional components.
Data Source
AI summary
According to an aspect of an embodiment, a method of modulating supervisory data onto an optical signal includes increasing a first power level of a first polarization component of an optical signal based on supervisory data. The method further includes decreasing a second power level of a second polarization component of the optical signal based on the supervisory data. The decrease in the second power level is substantially the same as the increase in the first power level such that a total power of the optical signal is substantially constant.