Optical Receiver Coupling via Fused Fiber Array and DEMUX
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Solution Overview
Problem
Existing optical transceivers face issues with optical coupling efficiency due to an angle mismatch between light transmission in optical fibers and fiber cores, leading to potential damage to the light receiving chip during the coupling process.
Innovation Solution
The optical receiving device employs a direct coupling method where the optical fiber cable from the demultiplexer is fused with an optical fiber array, aligning the wavelength sequences to directly couple optical signals to the optical receiving chip, avoiding the use of a 45-degree plane interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light is coupled to the optical receiving chip through a 45-degree surface of the DEMUX chip, then the optical signal can be redirected to the receiver, but the coupling efficiency is reduced and the risk of damaging the light receiving chip increases
Solution Approach 1:
The patent removes the 45-degree reflective surface from the DEMUX chip structure, extracting the problematic coupling interface. Instead of using the DEMUX chip's 45-degree surface for coupling, the invention directly connects the optical fiber cable to the optical receiving chip, eliminating the source of both the coupling efficiency loss and the chip damage risk
Solution Approach 2:
The patent introduces an optical fiber cable as an intermediary element between the DEMUX chip and the optical receiving chip. This intermediary allows for flexible alignment and coupling without requiring direct contact between the DEMUX chip's 45-degree surface and the receiver, thereby improving both coupling efficiency and chip safety
2Ease of manufacture
If the angle between light transmission in optical fiber and fiber core is no more than 8 degrees, then the alignment is simplified, but the optical coupling efficiency is significantly affected
Solution Approach 1:
The patent employs adjustable and flexible coupling mechanisms that allow dynamic optimization of the coupling angle. The optical fiber cable can be positioned and angled to achieve optimal coupling efficiency while maintaining ease of alignment through flexible mounting structures rather than fixed rigid angles
Solution Approach 2:
The patent optimizes the coupling parameters by adjusting the angle between the optical fiber and the fiber core to be within a specific range (no more than 8 degrees) while simultaneously optimizing other parameters such as lateral alignment and focal position to maintain high coupling efficiency despite the constrained angle
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 approach enhances coupling efficiency and prevents damage to the optical receiving chip, improving the reliability and performance of optical signal reception.
Implementation Method 1
the optical fiber cable of the demultiplexer is fused with an optical fiber array, so that the optical signal is directly coupled to the optical receiving chip
Data Source
AI summary
An optical receiving device includes a substrate; an optical receiving chip arranged on the substrate; an optical demultiplexer arranged on the substrate and used to distinguish optical signals into optical signals with different wavelengths; an optical transmission structure optically coupled to the optical demultiplexer and providing the optical signals to the optical demultiplexer; and an optical fiber array fused with optical fibers of the optical demultiplexer, and transmitting the optical signals with different wavelengths to the optical receiving chip. According to the optical receiving device, the optical fiber cable of the optical demultiplexer is directly fused with the optical fiber cable of the optical fiber array, so that the optical signal coming out from the optical fiber cable is directly coupled to the optical receiving chip, which not only improves the coupling efficiency, but also avoids the damage caused by the optical receiving chip colliding with external devices.