Optical Waveguide Board Layout for Leak-Light Receiver Sensitivity
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Solution Overview
Problem
Existing optical waveguide boards face challenges in enhancing light sensitivity for light receivers, as they lack an optimal structural arrangement that effectively captures light leaking from the cores.
Innovation Solution
The optical waveguide board incorporates a cladding layer with an element mount area for the light receiver, where the height of the element mount area is greater than the height of the area covering the cores, allowing for a gap that reduces contact and deformation, thereby enhancing light sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the light receiver is mounted close to the core to capture leaking light, then light sensitivity is improved, but the light receiver may contact the cladding layer or substrate causing deformation
Solution Approach 1:
The patent introduces a vertical height dimension to resolve the contradiction. The element mount area is positioned at a height greater than the cladding layer thickness, creating a vertical separation that allows the light receiver to be close to the core horizontally (for sensitivity) while maintaining vertical clearance (for stability). This dimensional approach enables both conflicting requirements to be satisfied simultaneously.
Solution Approach 2:
The element mount area acts as an intermediary structure between the light receiver and the cladding layer. It provides a mounting platform that is elevated above the cladding layer, mediating the spatial relationship to ensure the light receiver can detect leaking light effectively while preventing contact-induced deformation.
2Reliability
If the element mount area is elevated to prevent contact with the cladding layer, then structural stability is improved, but the distance to the core increases reducing light sensitivity
Solution Approach 1:
The patent resolves this contradiction by utilizing the vertical dimension. The element mount area is elevated in the vertical direction (height greater than cladding layer thickness) to prevent contact and ensure stability, while the horizontal positioning maintains proximity to the core for light detection. This separates the conflicting requirements into different spatial dimensions.
3Loss of energy
If the cladding layer thickness is increased to protect the core, then optical propagation efficiency is improved, but the height available for mounting the light receiver is reduced
Solution Approach 1:
The patent resolves this contradiction by transitioning from a two-dimensional planar mounting approach to a three-dimensional vertical mounting approach. The element mount area is positioned at a height greater than the cladding layer thickness, allowing the light receiver to be mounted above the cladding layer rather than on its surface. This enables sufficient cladding layer thickness for optical protection while providing adequate mounting height through vertical positioning.
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 structural arrangement increases the light sensitivity of the light receiver by ensuring that light leaking from the cores can be effectively sensed without interference from the substrate or cladding layer, while also reducing the risk of deformation and maintaining high optical propagation efficiency.
Implementation Method 1
a core in the cladding layer, the core defining an optical waveguide
Data Source
AI summary
An optical waveguide board includes a substrate, a cladding layer on the substrate, and a core in the cladding layer. The core defines an optical waveguide. The cladding layer includes a first surface facing the substrate and a second surface opposite to the first surface, and includes, on the second surface, an element mount area on which a light receiver is mountable. The element mount area is located with the core between portions of the element mount area in a plan view. A height from the substrate to the element mount area is greater than a height from the substrate to an upper surface of an area of the cladding layer covering the core.