Optical Transmission Apparatus Dummy Light Redundancy Control
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Solution Overview
Problem
Existing optical transmission systems require complex control schemes for redundant dummy light sources in submarine cable systems, which increases cost and design complexity.
Innovation Solution
An optical transmission apparatus with a multiplexing unit that combines signal light with dummy light from odd and even channels emitted by first and second dummy light sources, respectively, and includes a detection unit to perform addition control by switching the source of dummy light based on abnormality detection, allowing for simple control and redundancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple dummy light sources are made redundant to improve reliability, then system reliability is improved, but control complexity and cost increase
Solution Approach 1:
The dummy light sources are segmented into odd-channel and even-channel sources, each handling specific wavelength bands. This segmentation allows independent operation and failure isolation, maintaining reliability while simplifying control through role-based assignment rather than managing all sources uniformly.
Solution Approach 2:
Each dummy light source is designed to potentially provide both odd and even channel functionality through wavelength filtering. The odd-channel source can provide even-channel dummy light via a wavelength conversion unit, and vice versa, creating universal multi-functional units that reduce overall system complexity while maintaining redundancy.
2Reliability
If multiple dummy light sources are made redundant to improve reliability, then system reliability is improved, but cost increases
Solution Approach 1:
The wavelength conversion units enable each dummy light source to serve dual purposes by converting wavelengths. The odd-channel source converts to even-channel wavelengths and the even-channel source converts to odd-channel wavelengths, effectively reducing the total number of physical light sources needed while maintaining full redundancy coverage across all channels.
Solution Approach 2:
Instead of deploying separate physical light sources for each channel, the system creates functional copies through wavelength conversion. The conversion units generate equivalent dummy light functionality at different wavelengths, reducing hardware quantity while preserving the redundancy effect of having multiple independent sources.
Data Source
AI summary
An optical transmission apparatus includes a multiplexing unit multiplexing signal light of a main signal, and dummy lights of odd channel and an even channel emitted using first and second dummy light sources, respectively, a detection unit detecting abnormality of the first and second dummy light sources, and a control unit performing addition control. The addition control includes control in such a way that dummy light of an even channel emitted using the first dummy light source is additionally multiplexed with the signal light, when no abnormality is found in the first dummy light source and an abnormality of the second dummy light source is detected, and that dummy light of an odd channel emitted using the second dummy light source is additionally multiplexed with the signal light, when no abnormality is found in the second dummy light source and an abnormality of the first dummy light source is detected.