Re-modulation Device for Submarine Optical Cable Distance Extension
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The modulation degree of optical signals transmitted through submarine optical cables decreases due to amplification and signal-to-noise ratio deterioration, limiting the communicable distance, as existing technologies struggle to maintain a stable modulation level without compromising optical communication stability.
Innovation Solution
A re-modulation device that acquires second data from a first modulation optical signal and re-amplifies the optical signal, increasing its modulation degree by adding additional amplitude modulation when necessary, thereby extending the communicable distance of amplitude-modulated optical signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If optical signals are transmitted through submarine optical cables, then communication distance can be extended, but modulation degree decreases due to amplification and signal-to-noise ratio deterioration
Solution Approach 1:
The re-modulation device performs amplitude modulation in advance before the optical signal arrives at the demodulation reception device. By detecting the arrival of the first modulation optical signal and then applying a second amplitude modulation to the input optical signal, the system compensates for the modulation degree decrease that occurs during transmission through submarine cables, thereby extending the communicable distance while maintaining stable modulation degree.
2Length of moving object
If amplitude modulation is applied to extend communication distance, then modulation degree increases, but optical communication stability deteriorates
Solution Approach 1:
The re-modulation device detects the arrival of the first modulation optical signal and uses this feedback information to control when to apply the second amplitude modulation. By synchronizing the re-modulation operation with the signal arrival detection, the system maintains stable optical communication while extending the communicable distance through controlled amplitude modulation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The re-modulation device effectively elongates the communicable distance of optical signals in submarine cables by recovering the modulation degree, ensuring stable communication over longer distances without destabilizing the optical communication system.
Implementation Method 1
a re-modulation unit that sends, to the demodulation reception device, a second modulation optical signal derived by subjecting the input optical signal to a second amplitude modulation by the second data
Data Source
AI summary
In order to make a communicable distance in an optical cable of an optical signal which is subjected to amplitude modulation longer, a re-modulation device is provided with: an acquisition unit that acquires, from a first modulation optical signal obtained by performing first amplitude modulation on an optical signal with second data sent from a modulation transmission device to a demodulation reception device, the second data; and a re-modulation unit that, when determining passing of the first modulation optical signal, sends, to the demodulation reception device, a second modulation optical signal obtained by performing second amplitude modulation on the inputted optical signal with the second data.