Selectable Laser Mapping for Reliable Optical Fiber Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lasers used in data center optical communications are unreliable and have a short life, posing challenges for reliable and long-term operation.
Innovation Solution
An optical communication system with M selectable lasers, a controller for quality-based selection and mapping, a switch selector, and a multiplexer to ensure redundancy and adaptively manage laser selection and data stream mapping to maintain communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple selectable lasers are used to ensure reliability, then system reliability is improved, but device complexity increases
Solution Approach 1:
The system performs preliminary characterization of all M lasers during manufacturing or initial setup, storing quality metrics and operational parameters in advance. This pre-assessment enables the controller to quickly select N reliable lasers from the M available without complex real-time analysis, resolving the contradiction by preparing reliability data beforehand rather than determining it during operation.
Solution Approach 2:
The system implements continuous monitoring of laser performance parameters (power output, wavelength stability, error rates) and feeds this information back to the controller. Based on feedback, the controller dynamically adjusts laser selection and remaps data streams if degradation is detected, ensuring reliability while using simple threshold-based decision logic rather than complex algorithms.
2Reliability
If N lasers are selected and actively managed, then communication quality is maintained, but power consumption increases
Solution Approach 1:
The system extracts and activates only the N necessary lasers from the M available, leaving the remaining M-N lasers in a low-power or standby state. By separating active and inactive components and powering only what is immediately needed to maintain communication quality, the system reduces overall power consumption while preserving reliability through the availability of backup lasers.
3Duration of action of stationary object
If M lasers are used with M≥N for redundancy, then system lifetime is extended, but inter-channel interference increases
Solution Approach 1:
The system segments the M lasers into N active transmission channels and M-N standby or low-power channels. Each active laser operates on a dedicated wavelength or time slot, with physical or logical separation between channels. This segmentation allows redundancy to be maintained while minimizing interference by ensuring that not all lasers operate at full power simultaneously and by providing spatial or spectral isolation between active channels.
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
Ensures reliable operation of at least N operational lasers over the system's lifetime by managing redundancy and adaptively selecting lasers based on feedback, reducing power consumption and minimizing inter-channel interference.
Implementation Method 1
M different selectable lasers, each of the M different lasers configured to generate an optical communication signal having a carrier optical frequency
Data Source
AI summary
Apparatuses, methods, and systems for optical transmission are disclosed. One method includes generating, by each of a plurality of M different selectable lasers, an optical communication signal having a carrier frequency within a corresponding channel that is different than a carrier frequency and corresponding channel of each of other different lasers, selecting and mapping N of the M selectable lasers based on feedback regarding a quality the M different lasers, wherein N<M, selecting the N of the M selectable lasers for transmission over an optical fiber to a second optical receiver system, and receiving K input data streams, and generating N laser data streams, wherein each of the N laser data streams modulates a carrier signal of the selected N lasers, wherein a mapping of the K input data streams to the N laser data streams is modulated on each of the carrier signals of the selected N lasers.