Optical Connection Structure with Beam Diameter Conversion
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Solution Overview
Problem
Existing optical connectors fail to sufficiently inhibit end face reflection, particularly in small diameter fibers and multicore fibers, leading to instability in lasers, deterioration of transmission properties, and amplification properties due to return light and multipath interference.
Innovation Solution
The optical connection structure incorporates a first and second beam diameter conversion portion with inclined end faces and anti-reflection coatings, optically coupled with lens arrangements to propagate parallel lights, effectively increasing the optical diameter at the end faces to minimize reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a beam diameter conversion portion with an inclined end face is introduced to increase the optical diameter, then end face reflection is inhibited, but the device complexity increases
Solution Approach 1:
A beam diameter conversion portion is introduced as an intermediary component between the optical fiber and the lens arrangement. This conversion portion has an inclined end face that increases the optical diameter of the beam, thereby reducing end face reflection. The conversion portion acts as a mediator that transforms the optical parameters to achieve the desired reflection reduction without directly modifying the fiber or lens structures.
2Object-affected harmful factors
If the optical diameter at the end face is increased to minimize reflection, then return light is inhibited, but the manufacturing precision requirements increase
Solution Approach 1:
The end face of the beam diameter conversion portion is designed with a specific inclination angle to change the optical parameters of the system. By inclining the end face, the optical diameter is effectively increased, which reduces return light and end face reflection. This parameter change (inclination angle) is optimized to achieve the desired reflection reduction while managing the manufacturing precision requirements.
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 significantly reduces end face reflection, ensuring stable laser operation, improved transmission properties, and enhanced amplification performance by inhibiting return light and multipath interference, meeting the required reflection ratios for high-density photonic networks.
Implementation Method 1
The second end face is inclined with respect to a surface perpendicular to a center axis of each of the plurality of first transmission lines. The first beam diameter conversion portion is configured such that an optical diameter at the second end face is larger than an optical diameter at the first end face.
Implementation Method 2
The first lens arrangement and the second lens arrangement are mutually optically coupled to propagate parallel lights between the first lens arrangement and the second lens arrangement.
Data Source
AI summary
An optical connection structure includes a first spatial multiplex transmission line, a second spatial multiplex transmission line, a first lens arrangement, a second lens arrangement and a first beam diameter conversion portion. The first spatial multiplex transmission line has a plurality of first transmission lines. The second spatial multiplex transmission line has a plurality of second transmission lines. The first lens arrangement is optically coupled with the first spatial multiplex transmission line. The second lens arrangement is optically coupled with the second spatial multiplex transmission line. The first beam diameter conversion portion has a first end face and a second end face and arranged between the first spatial multiplex transmission line and the first lens arrangement. The first beam diameter conversion portion is configured such that an optical diameter at the second end face is larger than an optical diameter at the first end face.