Optical Communication System Digital Control Signal Transmission
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Solution Overview
Problem
Existing optical communication systems face challenges in efficiently transmitting control information with a simple configuration, as they often require complex frequency control and circuit configurations to avoid interference between signals.
Innovation Solution
The proposed optical communication system includes a master station device that generates a digital signal with multiple control information frames and transmits an optical signal containing this digital signal and an analog main signal through an optical fiber to a slave station device. The slave station device then acquires the control information from the digital signal, allowing for efficient transmission without strict frequency control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If control information is transmitted using existing optical communication systems, then transmission can be achieved, but the system requires complex frequency control and circuit configurations to avoid interference
Solution Approach 1:
The patent segments the transmitted signal into two distinct parts: an analog main signal carrying primary information and a digital control signal carrying control information. These segmented signals are transmitted through the same optical fiber but can be processed independently at the receiver, eliminating the need for complex frequency control to avoid interference between control and main signals.
Solution Approach 2:
The patent introduces an optical modulator as an intermediary device that converts the digital control signal into an optical signal that can be superimposed on the analog main signal. This intermediary enables the coexistence of digital and analog signals in the same optical channel without direct interference, simplifying the overall system configuration.
2Reliability
If strict frequency control is implemented to avoid signal interference, then transmission reliability improves, but system complexity and control requirements increase
Solution Approach 1:
The patent replaces the mechanical/electronic frequency control system with an optical modulation system. Instead of controlling frequencies to avoid interference, the system uses optical modulation to encode digital control information in a way that is inherently compatible with analog signal transmission, eliminating the need for strict frequency control.
Solution Approach 2:
The patent changes the parameter domain of control information from analog frequency-based transmission to digital optical intensity-based transmission. By converting control signals to digital form and modulating them optically, the system changes the fundamental parameters of signal transmission, allowing coexistence with analog signals without frequency control requirements.
3Productivity
If digital signal and analog main signal are transmitted together, then transmission efficiency improves, but signal interference may occur without proper frequency control
Solution Approach 1:
The patent creates an optical copy of the digital control signal through optical modulation, which is then superimposed on the analog main signal. This optical copying process ensures that the digital control information is transmitted in a form that does not interfere with the analog signal, while both signals share the same optical transmission medium, improving overall transmission efficiency.
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
This approach enables efficient transmission of control information with a simple configuration, reducing the complexity of circuit designs and avoiding the need for strict frequency control, thereby improving transmission efficiency and flexibility.
Implementation Method 1
an optical modulator that generates an optical signal based on the electrical signal
Implementation Method 2
transmits the optical signal including the generated digital signal and the analog main signal to the slave station device via an optical fiber
Data Source
AI summary
An optical communication system includes: a master station device and a slave station device. The master station device generates a digital signal including one frame in which plural pieces of control information are stored, and transmits an optical signal including the generated digital signal and an analog main signal, to the slave station device via an optical fiber. The slave station device acquires at least one piece of control information out of the plural pieces of control information, from the digital signal included in the optical signal received from the master station device via the optical fiber.