Optical Transmission Device APR Control Circuit Simplification
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Solution Overview
Problem
The existing monitoring control circuits in land optical transmission systems become overly complex and costly when used in systems requiring only APR control, as they need to handle multiple types of monitoring control signals, including those for APR, leading to increased costs.
Innovation Solution
An optical transmission device with an optical amplifying means, monitoring light generation, optical multiplexing, demultiplexing, and control means that simplifies APR control by combining and separating signal and monitoring light based on reception states and emission duration, eliminating the need for encoding and decoding circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a general land optical transmission system monitoring control circuit is used for APR control only, then APR control function is achieved, but device complexity and cost increase due to unnecessary encoding/decoding circuits and multi-function monitoring capabilities
Solution Approach 1:
The patent extracts only the necessary APR control function from the general monitoring control circuit, removing unnecessary encoding/decoding circuits and multi-function monitoring capabilities. The simplified circuit directly monitors optical signal presence and controls amplifier output without complex signal processing, achieving APR control with minimal components.
Solution Approach 2:
The monitoring light function is designed to serve multiple purposes: it detects optical signal presence for APR control, provides transmission path status information, and enables automatic amplifier control. This single monitoring mechanism replaces multiple specialized circuits, reducing overall system complexity while maintaining APR control reliability.
2Adaptability or versatility
If encoding and decoding circuits are included for monitoring control signals, then comprehensive monitoring control is achieved, but manufacturing cost increases
Solution Approach 1:
The patent removes encoding and decoding circuits from the monitoring control system, retaining only the essential optical signal monitoring and amplifier control functions. This extraction eliminates complex signal processing hardware, significantly reducing manufacturing cost while maintaining sufficient adaptability for APR control operations.
3Adaptability or versatility
If multiple types of monitoring control signals are processed, then comprehensive system monitoring is achieved, but device complexity increases
Solution Approach 1:
The patent implements a universal monitoring light mechanism that handles multiple monitoring functions through a single optical signal. The monitoring light detects signal presence, determines transmission path status, and triggers appropriate amplifier control actions, replacing multiple specialized monitoring circuits with one multi-functional system that reduces overall device complexity.
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 configuration allows for a simple and cost-effective APR control function in optical transmission systems, reducing complexity and costs by directly controlling amplification and monitoring light generation based on signal reception states and emission duration.
Implementation Method 1
an optical amplifying means for amplifying first signal light
Implementation Method 2
an optical multiplexing means for combining an output of the optical amplifying means and an output of the monitoring light generation means, and outputting the combined output to a first optical transmission path
Implementation Method 3
an optical demultiplexing means for separating light including second signal light and second monitoring light, and being input from a second optical transmission path, into the second signal light and the second monitoring light
Data Source
AI summary
An optical transmission device includes: an optical amplifier that amplifies first signal light; a monitoring light generation unit that generates first monitoring light; an optical multiplexer that couples an output of the optical amplifier and an output of the monitoring light generation unit to output the resultant to a first optical transmission line; an optical demultiplexer for separating light that includes second signal light and second monitoring light and that is inputted through a second optical transmission line, into the second signal light and the second monitoring light; and a control unit that controls the optical amplifier and the monitoring light generation unit on the basis of the reception state of the second signal light and the duration time of emission and reduction of the second monitoring light.