Optical Coupling Element with Non-45-Degree Reflection Surface
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Solution Overview
Problem
The existing methods for photoelectrical transmission using 45-degree total reflection surfaces suffer from beam reflection back to the laser transmitter and optical interferences, leading to reduced transmission efficiency due to incompatibility between optical fiber materials and beam orientation, which compromises the optical coupling effect.
Innovation Solution
An optical coupling element with a light guide element featuring a total reflection surface and specific included angles between the light incident and reflection paths, not equal to 45 degrees, is used to redirect beams from a light emitting element to a light transmission element, preventing interference and enhancing coupling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a 45-degree total reflection surface is used to couple beams from laser transmitter to optical fiber, then the optical path can be turned 90 degrees and transmission efficiency can be improved, but beams are reflected back to the laser transmitter causing optical interferences
Solution Approach 1:
The patent changes the reflection angle parameter from the conventional 45 degrees to a specific range (15-30 degrees or 60-75 degrees). This parameter modification ensures that reflected beams are directed away from the laser transmitter while maintaining effective optical coupling to the optical fiber, thus resolving the contradiction between transmission efficiency and optical interference
Solution Approach 2:
The patent converts the harmful back-reflection of beams into a beneficial directional control mechanism. By carefully selecting the reflection angle, the reflected beams are intentionally directed away from the laser transmitter and toward the optical fiber, transforming what was previously a harmful interference into a useful directional guidance feature
2Object-generated harmful factors
If an 8-degree inclined plane is used to prevent beam reflection back to laser transmitter, then optical interference is reduced, but the optical coupling effects of the optical fiber are significantly decreased
Solution Approach 1:
The patent modifies the reflection angle parameter from 8 degrees to a optimized range (15-30 degrees or 60-75 degrees). This parameter change achieves an optimal balance where reflected beams are sufficiently redirected to minimize interference while maintaining strong optical coupling efficiency with the optical fiber
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 configuration improves the optical coupling effect and reduces beam interference, resulting in increased transmission efficiency by ensuring that reflected beams do not interfere with the emitted beam, thus enhancing the overall performance of the optical module.
Implementation Method 1
a total reflection surface... the beam is reflected by the total reflection surface
Data Source
AI summary
An optical coupling element, for coupling a light emitting element to a light transmission element, includes a light guide element. The light guide element has a light incident part, a total reflection surface and a light output part. The light incident path is formed at the light incident part corresponding to the light emitting element. The light reflection path is formed at the light output part corresponding to the light transmission element. The first included angle θ1 is formed between the light incident path and the total reflection surface and is not equal to 45 degrees. The light emitting element is adapted to emit a beam toward the total reflection surface along the light incident path by passing through the light guide element from the light incident part. Moreover, the beam is reflected by the total reflection surface and is outputted toward the light transmission element.