Self-Tuning Optical Transceiver Power Control
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Solution Overview
Problem
Existing optical communication systems face challenges in dynamically adjusting optical power to optimize performance and prevent nonlinear optical effects, particularly in full-duplex fiber-optic systems where transceivers operate independently without coordinated power adjustments.
Innovation Solution
An optical transceiver system that includes an optical data receiver, an optical data transmitter, and an electronic controller, where the receiver detects error rates from Forward Error Correction (FEC) data and adjusts the optical output power of the transmitter to maintain optimal performance by exchanging FEC-performance data through dedicated fields in data frames, ensuring stable operation and autonomous power adjustments across transceivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If optical power is increased to improve transmission quality, then signal quality is improved, but nonlinear optical effects become more prominent
Solution Approach 1:
The patent implements a feedback mechanism where the receiver measures transmission quality metrics (BER, Q-value) and sends this information back to the transmitter. The transmitter then autonomously adjusts its optical output power based on this feedback to maintain optimal transmission quality while avoiding nonlinear optical effects. This closed-loop control enables dynamic adaptation without manual intervention.
Solution Approach 2:
The transceiver is designed to autonomously optimize its own operating parameters. The transmitter automatically adjusts its output power based on performance feedback from the receiver, eliminating the need for external control or manual configuration. This self-service capability allows the system to adapt to changing conditions while maintaining optimal performance.
2Reliability
If optical power is dynamically adjusted to optimize performance, then transmission quality is improved, but system complexity increases
Solution Approach 1:
The patent integrates multiple functions into the existing transceiver components. The receiver's performance measurement capabilities are reused for feedback purposes, and the transmitter's existing power control mechanisms are enhanced with autonomous adjustment logic. This multi-functionality approach avoids adding separate dedicated components for power optimization.
Solution Approach 2:
The patent combines the performance measurement function and power control function within the same transceiver unit. The receiver measures transmission quality and the transmitter adjusts power as an integrated system, rather than as separate external devices. This merging simplifies the overall system architecture while enabling dynamic optimization.
3Adaptability or versatility
If transceivers adjust power autonomously, then individual optimization is achieved, but coordination with other transceivers becomes difficult
Solution Approach 1:
The patent implements dynamic power adjustment where transceivers continuously adapt their output power based on real-time transmission conditions. This dynamic behavior allows each transceiver to respond to changing channel characteristics while the feedback mechanism ensures that adjustments are based on actual transmission performance rather than static configurations.
Solution Approach 2:
The feedback mechanism provides each transceiver with information about its own transmission performance, enabling autonomous optimization. The feedback is based on actual transmission quality measurements (BER, Q-value) rather than assumptions about other transceivers' behavior, allowing independent adaptation without requiring complex coordination protocols.
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 solution enables dynamic optimization of optical power to maintain optimal transmission quality, preventing nonlinear effects and ensuring stable operation of the WDM system by allowing transceivers to adjust their output powers independently, thus enhancing the overall performance and reliability of the communication system.
Implementation Method 1
an optical data receiver including a photodetector configured to detect an optical input signal
Data Source
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Figure 3A~3C
Figure 4
AI summary
An optical transceiver capable of optimizing the performance of the corresponding optical channel by dynamically adjusting the optical power of the output signal in response to the FEC-performance data received from the corresponding remote transceiver. In an example embodiment, the FEC-performance data can be exchanged by the two optical transceivers using a dedicated field in the overhead of the transmitted data frames. The power-adjustment process is configured to be relatively slow to prevent the occurrence of transients on other optical channels and ensure stable operation of the corresponding WDM system as a whole, while different transceivers thereof are allowed to adjust their respective output powers in an autonomous way and independent of each other. The performance optimization can be directed at meeting a predefined performance target specified by the system designer or operator while driving the operating point away from conditions under which nonlinear optical effects may become relatively prominent.