Optical Module Power Control via Bias and Modulation Current Feedback
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Solution Overview
Problem
Traditional optical modules in modern communication systems operate at fixed power levels, unable to adjust output optical power according to varying communication distances, leading to inefficient power consumption and system performance issues.
Innovation Solution
An optical module and method that dynamically adjusts output optical power by detecting input and output optical power, calculating bias and modulation currents, and using a controlling and calculating unit to optimize power levels based on receiving sensitivity and communication needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If traditional optical modules operate at fixed power levels, then device complexity is reduced, but power consumption efficiency deteriorates
Solution Approach 1:
The patent implements dynamic optical power adjustment by calculating bias current and modulation current based on detected optical power levels and communication distance. The optical transmitting device dynamically changes its operating state according to feedback information, transitioning from fixed power operation to adaptive power control that matches actual communication needs.
Solution Approach 2:
The patent establishes a feedback mechanism where the optical receiving device detects received optical power and sends feedback information to the optical transmitting device. This feedback loop enables the transmitting device to adjust its output power based on actual reception quality, optimizing power consumption while maintaining communication reliability.
2Use of energy by moving object
If optical modules dynamically adjust output optical power, then power consumption efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service functionality where the optical module automatically detects its own operating parameters (optical power levels, communication distance) and adjusts its output without external intervention. The device uses its own sensing capabilities to calculate appropriate bias and modulation currents, eliminating the need for manual configuration or external control systems.
Solution Approach 2:
The patent changes key operating parameters (bias current and modulation current) to achieve dynamic power adjustment. By modifying these electrical parameters based on detected optical conditions, the system adapts its output power characteristics to match actual communication requirements, improving energy efficiency through parameter optimization.
3Manufacturing precision
If fixed output optical power is used, then manufacturing precision requirements are reduced, but adaptability to varying distances deteriorates
Solution Approach 1:
The patent transitions from static fixed-power design to dynamic adaptive-power operation. The optical transmitting device continuously adjusts its output based on detected communication distance and received power levels, enabling it to adapt to varying transmission distances while maintaining optimal power consumption and signal quality.
Solution Approach 2:
The patent creates a universal optical module that can effectively communicate over varying distances by automatically adjusting its output power. The device serves multiple distance requirements (short, medium, long range) through its adaptive power control capability, eliminating the need for separate fixed-power modules for different applications.
Data Source
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AI summary
A method of adjusting an optical power includes: detecting an input optical power by an optical receiving device and detecting an output optical power by an optical transmitting device; determining whether the output optical power must be adjusted; calculating a bias current and a modulation current; and adjusting the output optical power according to the calculated bias current and the modulation current.