Optical Transmission Module Hollow Cylindrical Body Positioning
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Solution Overview
Problem
Existing optical transmission modules face challenges in accurately positioning the light-emitting section of the optical element and the optical fiber, leading to reduced precision and stability in signal transmission.
Innovation Solution
The optical transmission module incorporates a hollow cylindrical body with a specific diameter matching the optical fiber, mounted on a wiring board with a penetrating hole, ensuring precise alignment and efficient heat dissipation through a metal film and solder bonding, while the optical fiber is inserted into the cylindrical body for accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional optical fiber holding member with a through hole is used, then the optical fiber can be inserted, but the positioning accuracy between the light-emitting section and the optical fiber is insufficient
Solution Approach 1:
The patent extracts the positioning function from a complex holding member structure and concentrates it into a simple hollow cylindrical body with an inner diameter that precisely matches the optical fiber outer diameter. This cylindrical body is directly joined to the light output surface, eliminating the need for additional positioning mechanisms while achieving high positioning accuracy through the interference fit between the cylindrical body and optical fiber.
Solution Approach 2:
The hollow cylindrical body serves multiple functions simultaneously: it acts as a positioning element, a holding structure for the optical fiber, and a thermal conduction path. By integrating these functions into a single component directly joined to the light output surface, the patent simplifies the overall structure while maintaining high positioning accuracy and thermal management capability.
2Manufacturing precision
If the optical fiber outer diameter is made equal to the hollow cylindrical body inner diameter, then positioning accuracy is improved, but the insertion and assembly process becomes more difficult
Solution Approach 1:
The patent performs preliminary positioning by precisely matching the hollow cylindrical body's inner diameter to the optical fiber's outer diameter before final assembly. This pre-configured dimensional relationship ensures that when the optical fiber is inserted, it automatically achieves accurate positioning without requiring complex adjustment procedures, thereby maintaining ease of assembly while ensuring high positioning accuracy.
3Reliability
If the hollow cylindrical body is directly joined to the light output surface, then thermal conductivity is improved, but the joining process becomes more complex
Solution Approach 1:
The patent merges the hollow cylindrical body with the light output surface through direct joining, creating a thermally conductive path that efficiently transfers heat from the light-emitting section. This integration eliminates thermal resistance at interfaces and simplifies the joining process by treating the cylindrical body as an inherent part of the optical element assembly, thereby improving thermal conductivity without significantly increasing manufacturing complexity.
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 enhances the accuracy of positioning the optical elements, reduces module size, and ensures stable operation by maintaining high thermal conductivity, resulting in improved reliability and precision in optical signal transmission.
Implementation Method 1
ensures stable operation by maintaining high thermal conductivity
Data Source
AI summary
An optical transmission module includes an optical element including a light-emitting section configured to output light of an optical signal, a hollow cylindrical body joined perpendicularly to a light output surface of the optical element, a wiring board, on a first principal surface of which the optical element is mounted and through a hole of which the hollow cylindrical body is inserted, and an optical fiber configured to transmit the optical signal, a distal end portion of which is inserted into the hollow cylindrical body.