Removable Fiber Array Unit for Photonic Edge Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing photonic systems face challenges in efficiently coupling optical fibers to edge couplers within photonic structures, particularly due to assembly tolerance issues that affect optical coupling accuracy and the need for reduced package size.
Innovation Solution
A fiber array unit (FAU) assembly is introduced, which includes a connecting component secured to the photonic structure, a removably attached FAU holding optical fibers, and micro-lenses positioned near the bottom of the connecting component to improve optical coupling accuracy. The FAU assembly is attached to the photonic structure in an upside-down manner, reducing substrate footprint and package size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If optical fibers are directly coupled to edge couplers in photonic structures, then optical signal transmission is achieved, but assembly tolerance issues reduce optical coupling accuracy
Solution Approach 1:
The patent introduces a fiber array unit (FAU) assembly as an intermediary component between the optical fibers and edge couplers. The FAU assembly includes a connecting component with connection structures that interface with both the fibers and the couplers, serving as a mediator that compensates for assembly tolerances and improves optical coupling accuracy.
Solution Approach 2:
The coupling system is segmented into distinct functional components: the FAU holding the optical fibers, the connecting component with connection structures, and the edge couplers in the photonic structure. This segmentation allows each component to be optimized independently and facilitates easier assembly and alignment.
2Area of stationary object
If traditional fiber coupling methods are used, then optical transmission is achieved, but package size cannot be reduced
Solution Approach 1:
The FAU assembly is attached to the photonic structure in an upside-down manner, with the connecting component extending laterally from the sidewall rather than from the substrate plane. This three-dimensional arrangement optimizes space utilization and reduces the substrate footprint, thereby reducing overall package size.
Solution Approach 2:
The connecting component serves multiple functions: it provides mechanical support for the FAU, enables alignment through connection structures, and facilitates the upside-down attachment configuration. This multi-functionality reduces the need for additional components, simplifying the overall assembly process.
3Ease of operation
If optical glue is used to secure FAU to photonic structure, then assembly is simplified, but fiber replacement becomes difficult
Solution Approach 1:
The connection structures are designed to provide removable attachment, allowing the FAU to be detached and reattached. This dynamic connection enables easy fiber replacement while maintaining alignment, combining the simplicity of glued assembly with the flexibility of reusable connections.
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
The FAU assembly enhances optical coupling accuracy by aligning micro-lenses with edge couplers, facilitates easy fiber replacement, and reduces the overall size of the photonic system by optimizing the placement of components.
Implementation Method 1
one or more micro-lenses, each positioned between a corresponding one of the optical fibers and a corresponding one of the edge couplers within the photonic structure
Data Source
AI summary
A photonic system is provided. The photonic system includes a substrate and a photonic structure bonded to the substrate, wherein the photonic structure includes one or more edge couplers. The photonic system also includes a fiber array unit (FAU) assembly attached to the sidewall of the photonic structure near the edge couplers. The FAU assembly includes a connection component, a FAU holding one or more optical fibers, and one or more micro-lenses. The connection component is secured to the sidewall through optical glue. The FAU is removably attached to the connection component through a pair of matching connection structures at an interface between the FAU and the connecting component. The micro-lenses are provided near the bottom of the connecting component and between the edge couplers and the optical fibers.