Edge Mount Optical Transceiver Assembly Scalability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical interconnect systems, such as QSFP/QSFP+, are not scalable to higher bandwidths like 40 Gb/s, posing a challenge for datacenter networks with growing demands and are costly, limiting the transition from copper interconnects.
Innovation Solution
An edge mount optical transceiver assembly and plug connector system that allows for field replacement of optical transceiver modules, enabling scalability from 10 Gb/s to 40 Gb/s data rates without removing the PCB from the server, using a plug connector with a cantilevered door and internal coil spring for reliable light coupling and electromagnetic protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing optical interconnect systems (QSFP/QSFP+) are used, then current data rates of 10 Gb/s are achieved, but scalability to higher bandwidths (40 Gb/s) is limited and costs are high
Solution Approach 1:
The optical transceiver system is divided into separate modular components: a pluggable transceiver module that can be independently replaced and a fixed PCB mounting structure. This segmentation allows the transceiver module to be upgraded or replaced without replacing the entire optical interconnect system, enabling scalability from 10 Gb/s to 40 Gb/s while maintaining the existing PCB infrastructure and reducing overall system complexity and cost.
2Adaptability or versatility
If optical transceiver modules are replaced in existing systems, then bandwidth scalability is achieved, but the PCB must be removed from the server which increases maintenance complexity
Solution Approach 1:
The mounting structure is segmented into a fixed PCB interface and a removable transceiver module. The PCB retains its fixed mounting points and electrical connections, while the transceiver module becomes a self-contained pluggable unit. This allows field replacement of the transceiver module to achieve bandwidth scalability without removing or modifying the PCB, significantly simplifying maintenance operations.
Solution Approach 2:
The transceiver module is extracted as a separate, independently replaceable component from the PCB assembly. The module includes all necessary optical interfaces and electrical connections, allowing it to be removed and replaced at the module level while the PCB remains installed in the server. This extraction enables easy field replacement for maintenance and upgrades without disrupting the entire system.
3Reliability
If conventional connector designs are used, then basic connectivity is achieved, but particle contamination and electromagnetic interference are not adequately reduced
Solution Approach 1:
The connector employs a nested structure with multiple protective layers: an outer shell that provides mechanical protection and electromagnetic shielding, an inner connector body that houses the optical interfaces, and sealed compartments that prevent particle contamination. This nested design allows each layer to address specific harmful factors while maintaining overall connection reliability.
Solution Approach 2:
The connector design converts potential harmful factors into protective features: the metallic outer shell that could conduct electricity is instead used for electromagnetic shielding; the tight tolerances that could trap particles are designed to create sealed barriers against contamination; and the complex multi-component structure that increases manufacturing difficulty is leveraged to provide multiple levels of protection against interference and contamination.
Data Source
AI summary
Embodiments include a high bandwidth optical connection system suitable for interconnecting servers, for example within a rack of a datacenter. An edge mount optical connector assembly includes an edge-mount housing providing topside socket contacts proximate to a first end of the housing and a port at a second end to receive an optical plug connector. A socket latch cantilevered from an anchor point on the housing includes a latching face to contact a keeper face disposed on the housing and a spring load application surface between the anchor point and the latching face to apply a spring force against the electrical contacts for retention of a removable optical transceiver module. An optical plug connector includes a front housing joined to a rear housing with a plug lens spring loaded within the housing and with alignment features comprising two flat alignment surfaces orthogonally oriented relative to each other.