Optical Demultiplexing Device Odd Even Channel Separation
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Solution Overview
Problem
Current optical communication systems face challenges in demultiplexing optical signals with different wavelength intervals efficiently, requiring multiple wavelength selective switches with a large number of ports, which is costly and impractical.
Innovation Solution
An optical demultiplexing device with branch, band division, multiplexing, and control means that separates and multiplexes signals by odd and even channels within each wavelength interval, using wavelength selective switches controlled by signal arrangement information to reduce the number of ports needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wavelength selective switches with a large number of ports are used to demultiplex optical signals with different wavelength intervals, then the demultiplexing capability is improved, but the device complexity and cost increase
Solution Approach 1:
The patent segments the demultiplexing function by separating odd channels and even channels into different processing paths. The wavelength selective switch processes only half the channels at a time (either odd or even), reducing the required number of ports while maintaining full demultiplexing capability through coordinated operation of multiple switches
Solution Approach 2:
The patent employs dynamic channel assignment where the wavelength selective switch can be configured to handle different wavelength intervals adaptively. The control unit dynamically adjusts which channels (odd or even) are processed by which switch based on the signal arrangement information, enabling flexible adaptation to different demultiplexing requirements without increasing port count
2Productivity
If wavelength selective switches are controlled based on signal arrangement information, then the demultiplexing efficiency is improved, but the control complexity increases
Solution Approach 1:
The control unit receives signal arrangement information in advance and pre-configures the wavelength selective switches before demultiplexing operations begin. This preliminary configuration optimizes the switching paths and channel assignments, enabling efficient demultiplexing execution without real-time computational complexity during the actual signal processing
Data Source
AI summary
A branch units branches an optical signal by the number of wavelength intervals. Each band division unit generates a band division signal in which a signal band is divided into N division bands and an odd channel and an even channel are separated from each other. Multiplexing units multiplex band division signals of the same signal band, and branch means output the multiplexed signal to an optical receiver. A control unit controls the wavelength selective switch included in the band division units based on information indicating a signal arrangement of the signals in the respective wavelength intervals, thereby causing a signal of a signal band in which a signal of a corresponding wavelength interval is present to be included in each band division signal.