Wavelength Multiplexing Passband Auto-Setting for Optical Transponders
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Solution Overview
Problem
The increasing capacity of optical submarine cable systems leads to an increased setting work amount in terminal devices due to the need to register characteristics of numerous transponders, such as center frequency and bandwidth, in the system monitoring device.
Innovation Solution
A wavelength multiplexing device and method that automatically set pass bands based on measured optical power and waveform information, using a wavelength multiplexing unit, optical monitoring unit, calculation unit, and control unit to determine and adjust center frequency and bandwidth without manual registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the capacity of optical submarine cable system is increased by adding more transponders, then the communication capacity is improved, but the setting work amount in terminal device is increased
Solution Approach 1:
The system enables automatic setting of pass bands by having the terminal device autonomously acquire transponder characteristics and configure wavelength multiplexing parameters without manual intervention. The terminal device serves itself by automatically registering transponder information and adjusting filter characteristics based on acquired data.
Solution Approach 2:
The terminal device acquires transponder characteristics (center frequency, bandwidth) in advance before wavelength multiplexing operations. This preliminary acquisition of information allows the system to pre-configure pass bands and filter settings, eliminating the need for manual setting work when transponders are added.
2Manufacturing precision
If manual registration of transponder characteristics is performed for each transponder, then the filter characteristics can be accurately set, but the setting time and labor cost are increased
Solution Approach 1:
The patent replaces manual mechanical setting operations with automated electronic acquisition and configuration processes. The terminal device automatically acquires transponder characteristics through electronic communication and programmatically configures pass band settings, substituting manual registration work with automated electronic procedures.
Solution Approach 2:
The system implements a feedback mechanism where the terminal device acquires transponder characteristics, automatically configures pass bands based on acquired data, and verifies the settings. This closed-loop feedback process ensures accurate filter characteristics are set automatically without manual intervention.
Data Source
AI summary
A wavelength multiplexing device according to the present disclosure includes a wavelength multiplexer for causing input light inputted from a plurality of input ports for receiving optical signals to pass within a passband determined by a set center frequency and a set bandwidth, and outputting the light from an output port; an optical monitor for measuring optical power of the optical signals for each optical frequency and generating optical waveform information; a calculator for calculating a main signal center frequency which is the center frequency of the optical signals and a main signal bandwidth which is the bandwidth of the optical signals; and a controller for setting the set center frequency to the main signal center frequency and setting the set bandwidth to the main signal bandwidth.