Photonic Component Alignment Using Reference Surfaces
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for aligning and coupling optical components in photonic systems are labor-intensive, time-consuming, and inefficient, requiring active alignment and iterative adjustments, which hinder parallelization and increase fabrication complexity.
Innovation Solution
The use of a micro-optical bench with precisely fabricated optical components and reference surfaces allows for passive alignment and coupling by positioning components against these surfaces, eliminating the need for active alignment and iterative adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If active alignment and iterative adjustments are used to align optical components, then alignment precision can be achieved, but fabrication time and process complexity increase significantly
Solution Approach 1:
The patent applies preliminary action by pre-defining alignment features and reference surfaces during the component fabrication process. Alignment marks, V-grooves, and reference surfaces are created beforehand on substrates and components, eliminating the need for time-consuming active alignment during assembly. Components are designed with built-in alignment structures that guide their positioning relative to one another before the actual assembly occurs.
Solution Approach 2:
The patent implements self-service through self-aligning component structures. Components are designed with features such as V-grooves, alignment marks, and reference surfaces that automatically guide their positioning when brought together. The alignment features on mating components work together to automatically establish correct relative positioning without requiring external active alignment equipment or iterative adjustments.
2Manufacturing precision
If active alignment with multi-axis stages and feedback control is employed, then component alignment accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts the alignment function from complex active alignment equipment and embeds it directly into the component structures themselves. Instead of using external multi-axis stages and feedback control systems, the alignment capabilities are built into the components through integrated alignment features, reference surfaces, and mechanical guidance structures that perform the alignment function inherently.
Solution Approach 2:
The alignment system becomes self-service through components that contain built-in alignment features such as V-grooves, alignment marks, and reference surfaces. These features enable components to self-align when assembled, eliminating the need for complex external alignment equipment, multi-axis stages, and active feedback control systems.
3Manufacturing precision
If V-groove technology is used for fiber spacing, then regular interval spacing is achieved, but wafer real-estate is consumed and fabrication complexity increases
Solution Approach 1:
The patent applies universality by designing reference surfaces and alignment features that serve multiple functions simultaneously. The same reference surfaces used for alignment also define component positions and spacing, eliminating the need for separate V-groove structures dedicated solely to fiber spacing. This multi-functionality reduces the area required on the wafer while maintaining precise spacing regularity.
4Manufacturing precision
If iterative readjustment and optical verification processes are used, then optical coupling verification is achieved, but productivity and fabrication efficiency decrease
Solution Approach 1:
The patent applies preliminary action by incorporating alignment features and reference surfaces into components during fabrication, before assembly. This pre-defined alignment infrastructure enables direct placement and automatic alignment during assembly, eliminating the need for iterative readjustment and optical verification processes that would otherwise be required to achieve proper optical coupling.
Solution Approach 2:
The alignment and coupling verification process becomes self-service through components with built-in alignment features that automatically guide correct positioning. When components are brought together, their alignment features and reference surfaces automatically establish the correct relative positions for optimal optical coupling, eliminating the need for time-consuming iterative adjustments and verification measurements.
Data Source
AI summary
Systems and method for aligning components of photonic systems are provided. An optical component for integration into and optical coupling within a photonic system is created by separating the component from a substrate to form a precisely defined surface on the optical component, the surface being precisely spaced from an optical feature of the component to be optically coupled within the photonic system. The precisely defined surface of the optical component is then pressed against a reference surface to position the optical feature in a predefined position and/or orientation for optical coupling of the optical feature within the photonic system. Passive precise alignment and optical coupling is thus provided without the need for iterative readjustment, multi-axis feedback, or active feedback.