Annular Laser Package Structure for High Channel Density
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Solution Overview
Problem
Traditional multi-channel parallel transmission optical devices occupy significant horizontal and vertical space, leading to inefficient use of space and high manufacturing costs due to complex packaging processes and low channel density.
Innovation Solution
A package structure with laser generating units arranged annularly around the axis of a package base, utilizing optical mirror groups and converging lenses to convert divergent laser beams into parallel beams, allowing for coaxial packaging and reducing device volume, material costs, and manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If BOX free space packaging is used with parallel channel arrangement, then optical transmission function is achieved, but device volume is large and space utilization is low
Solution Approach 1:
The patent transitions from traditional horizontal parallel arrangement to a vertical stacked arrangement where multiple optical channels are stacked along the vertical dimension. This dimensional change allows channels to occupy different vertical levels rather than spreading horizontally, significantly reducing device footprint and improving space utilization while maintaining optical transmission functionality.
Solution Approach 2:
The patent implements a nested structure where multiple optical channels are stacked one above another in a vertical configuration, with each channel containing its complete optical path components (laser chip, collimating lens, focusing lens, photodetector). This nesting approach allows compact integration of multiple channels within a small vertical space, dramatically increasing channel density.
2Manufacturing precision
If BOX packaging with large optical path gap is used, then multi-channel transmission is achieved, but optical power balance cannot be ensured
Solution Approach 1:
The patent replaces the mechanical alignment approach of traditional BOX packaging with an optical field coupling approach. By using focusing lenses to converge light from vertically stacked laser chips onto vertically stacked photodetectors, the system achieves optical power balance through optical field overlap rather than mechanical precision alignment, eliminating the need for large optical path gaps.
Solution Approach 2:
The patent changes the spatial arrangement parameter from horizontal parallel positioning with large gaps to vertical stacking with minimal gaps. By altering the geometric configuration and using optical focusing to bridge the vertical distance, the system achieves both compact size and optical power balance simultaneously.
3Ease of manufacture
If BOX shell packaging is used, then optical channel isolation is achieved, but manufacturing process is complicated and cost is high
Solution Approach 1:
The patent merges multiple independent optical channels into a single integrated vertical stack, sharing common packaging structures, mounting substrates, and housing. This consolidation eliminates the need for separate BOX shells for each channel, simplifying the manufacturing process and reducing overall device complexity while maintaining optical channel isolation through vertical stacking.
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
Significantly increases channel density, reduces device package volume, and lowers material and manufacturing costs while enhancing packaging reliability and automaticity.
Implementation Method 1
each laser generating unit is equipped with an optical mirror group to convert the laser emitted by the laser generating unit into the laser beam parallel to the axis of the package base
Implementation Method 2
pre-processing unit for converting the laser emitted by the laser generating unit into the collimated beam that parallel to the axis of the package base
Implementation Method 3
a converging lens is also configured inside or outside the package shell, or the package cap uses the converging lens as an optical window, and to converge each laser beam into output beam
Data Source
AI summary
A package structure for the multi-channel parallel transmission optical device includes a package base, a package cap which is used to form a package shell with the package base, and a plurality of laser generating units that are all mounted on the package base and arranged annularly relative to the axis of the package base. Each laser generating unit is equipped with an optical mirror group to convert the laser emitted by the laser generating unit into the laser beam parallel to the axis of the package base. A converging lens is also configured inside or outside the package shell, or the package cap uses the converging lens as an optical window, and to converge each laser beam into output beam. The optical path design can significantly reduce the device package volume, which correspondingly increases the channel density.