Optical Waveguide Transition Layer Bonding Stability
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Solution Overview
Problem
The metal reflection layer in existing optical waveguide devices is prone to detachment due to insufficient bonding force with the in-coupler gratings, affecting optical efficiency.
Innovation Solution
Incorporating a transition layer between the reflection layer and the in-coupler gratings, which enhances the bonding force and prevents detachment, while allowing light to pass through without affecting the propagation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a metal reflection layer is plated on in-coupler gratings to improve optical efficiency, then the optical efficiency is improved, but the bonding force between the reflection layer and in-coupler gratings is insufficient causing detachment
Solution Approach 1:
An adhesive layer is introduced as an intermediary between the metal reflection layer and the in-coupler gratings. This adhesive layer serves as a mediator that provides strong bonding to both surfaces, resolving the detachment problem while maintaining the optical efficiency provided by the metal reflection layer.
Solution Approach 2:
The structure transitions from a simple two-layer configuration (metal reflection layer + in-coupler gratings) to a composite three-layer structure (metal reflection layer + adhesive layer + in-coupler gratings). This composite structure combines the high reflectivity of metal with the strong adhesion properties of the adhesive layer, achieving both optical efficiency and bonding stability.
2Device complexity
If the reflection layer is plated directly on in-coupler gratings, then the device structure is simple, but the reflection layer is prone to detachment affecting reliability
Solution Approach 1:
The adhesive layer acts as a mediator that is specifically designed to bond strongly to both the metal reflection layer and the in-coupler gratings surface, eliminating the detachment issue without significantly complicating the overall device structure.
Solution Approach 2:
The invention changes the material parameter of the interface between the reflection layer and in-coupler gratings by introducing an adhesive layer with optimized adhesion properties, thereby improving reliability while maintaining structural simplicity.
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 transition layer effectively addresses the detachment issue of the reflection layer, ensuring stable operation and improved optical efficiency of the waveguide device.
Implementation Method 1
light from a light source propagates in the waveguide layer by total reflection
Implementation Method 2
a reflection layer (such as Ag) is plated on the in-coupler gratings
Implementation Method 3
in-coupler gratings and out-coupler gratings arranged on a same side of the waveguide layer
Data Source
AI summary
The present disclosure provides an optical waveguide device and an electronic equipment. The optical waveguide device includes: a waveguide layer, in-coupler gratings and out-coupler gratings arranged on a same side of the waveguide layer, a reflection layer formed on a side of the in-coupler gratings away from the waveguide layer; and a transition layer formed between the reflection layer and the in-coupler gratings. The transition layer is used to address the problem that the reflection layer is prone to detachment.