Optical Transceiver Fiber Tray Absorbing Dimensional Tolerances
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Solution Overview
Problem
Existing optical transceivers face challenges in efficiently coupling inner fibers with external optical connectors due to dimensional tolerances, leading to surplus fiber lengths that absorb stresses and cause optical losses, and the use of flexible printed circuit boards increases assembly costs.
Innovation Solution
The optical transceiver design incorporates a fiber tray that secures a fiber bundle with extra lengths, warping the fibers along the direction connecting the transducer and optical receptacle, and uses a multiple-fiber push-on connector to optically couple with semiconductor laser and photodiode chips, absorbing positional tolerances and reducing stress on fibers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inner fibers are made longer to absorb dimensional tolerances, then reliability is improved, but device complexity increases due to surplus fiber management
Solution Approach 1:
A fiber tray is introduced as an intermediary component to manage and secure the inner fibers. The tray provides a structured pathway for the fibers to extend from the transducer to the optical receptacle, absorbing dimensional tolerances while maintaining organization and reducing stress on the fiber connections.
Solution Approach 2:
The fiber tray extends in a direction connecting the transducer and optical receptacle, utilizing three-dimensional space to route the fibers. This dimensional approach allows the fibers to naturally absorb positional variations without requiring complex routing or additional securing mechanisms.
2Reliability
If FPC board is used to connect lens assembly with circuit board to absorb dimensional tolerances, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The FPC board is extracted from the system and replaced with a simpler fiber tray structure. The fiber tray directly secures the inner fibers without requiring the complex FPC board assembly, thereby reducing manufacturing costs while still providing the necessary dimensional tolerance absorption.
Solution Approach 2:
The design changes from using an FPC board (electrical connection method) to a fiber tray (mechanical fiber securing method). This parameter change simplifies the structure and reduces assembly complexity while maintaining the function of absorbing dimensional tolerances between components.
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 design effectively absorbs dimensional tolerances, reduces optical losses, and lowers assembly costs by utilizing a fiber tray to manage extra fiber lengths and a multiple-fiber push-on connector for efficient optical coupling, enhancing the mechanical design and communication capabilities of the optical transceiver.
Implementation Method 1
The fiber bundle includes inner fibers that optically couple the MPO connector with the LD chip and the PD chip
Data Source
AI summary
An optical transceiver performing the full-duplex transmission in a plural channel is disclosed. The optical transceiver provides an optical receptacle, a semiconductor optical device, an inner fiber that optically couples the optical receptacle with the semiconductor optical device, and a fiber tray that secures an extra length of the inner fiber. The fiber tray provides an inner wall inclined toward a direction perpendicular to a direction along which the inner fiber warps. The inner fiber is set within the space as touching the inclined inner wall and sliding thereon toward the inclined direction.