Optical Source Switching for Silicon Photonics Reliability
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Solution Overview
Problem
As the number of channels in silicon photonics-based optical modules increases, the existing solution of replacing failed optical modules becomes costly and inefficient, with high failure rates of optical sources leading to reduced module lifespan and increased operating temperatures.
Innovation Solution
An optical source switching apparatus and method that utilizes an optical cross-connect device and couplers to redirect optical energy from a backup source to replace a failed optical source, enabling quick switching and reducing overall costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of channels in optical modules is increased, then the integration capability and transmission capacity are improved, but the failure rate of optical sources increases and module lifespan decreases
Solution Approach 1:
The optical module is segmented into independent optical source units, each with its own backup. Instead of treating the entire module as a single unit, the patent divides the optical source subsystem into multiple independently replaceable components, allowing selective replacement of failed sources without replacing the entire module.
Solution Approach 2:
Backup optical sources are pre-configured and activated before actual failure occurs. The system maintains standby optical sources that can immediately take over when a primary source fails, preventing service interruption and extending effective module lifespan.
2Reliability
If optical module failure occurs, then service interruption happens, but replacing the entire optical module is costly and inefficient
Solution Approach 1:
The optical module is divided into replaceable sub-components, specifically the optical source units. When a failure occurs, only the failed optical source needs to be replaced rather than the entire expensive optical module, significantly reducing replacement costs and simplifying maintenance.
Solution Approach 2:
Failed optical sources are identified and replaced individually while the rest of the optical module continues to operate. The backup optical sources are activated to recover service functionality, allowing partial discarding and replacement of only the necessary components.
3Ease of manufacture
If optical sources are densely integrated, then packaging cost is reduced, but optical energy management becomes complex and heat dissipation increases
Solution Approach 1:
The optical absorption apparatus is extracted as a separate functional component from the optical sources. This dedicated absorption unit is specifically designed to manage the optical energy and heat generated by the densely integrated sources, separating the heat management function from the light generation function.
Solution Approach 2:
The optical absorption apparatus acts as an intermediary between the optical sources and the environment. It absorbs excess optical energy and converts it to heat, which is then managed through the heat dissipation structure, serving as a mediator that protects the optical sources from energy buildup and thermal damage.
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 improves the reliability of optical sources and reduces costs by allowing for efficient replacement of failed optical sources, thereby extending the lifespan of optical modules and minimizing downtime.
Implementation Method 1
both the first optical source and the second optical source are configured to output continuous optical energy, and the optical cross-connect device is configured to enable optical energy output by at least one of the one or more first optical sources to enter the first coupler when at least one of the one or more second optical sources fails
Implementation Method 2
the first coupler is configured to implement beam splitting of the optical energy of the first optical source and/or the second optical source
Data Source
AI summary
An optical source switching apparatus including first optical sources, an optical cross-connect device, second optical sources, and a first coupler. The optical cross-connect device is connected to the first optical sources and the first coupler, and the first coupler is connected to the second optical source; both the first optical source and the second optical source are configured to output continuous optical energy, and the optical cross-connect device is configured to enable optical energy output by at least one of the first optical sources to enter the first coupler when at least one of the second optical sources fails; and the first coupler is configured to implement beam splitting of the optical energy output by the first optical source or the second optical source.