Optical Transceiver Ground Separation via Insulator
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Solution Overview
Problem
Conventional optical transceivers using CAN-type EML elements face challenges in separating signal ground from frame ground, violating apparatus specifications and preventing EMI, as the metal surface of CAN-type EML elements lacks a ceramic board for grounding, integrating signal and frame grounds and thus failing to effectively suppress noise emission.
Innovation Solution
An optical transceiver configuration where a conductor is electrically connected to the optical component, with a sheet-like insulator or wave absorber positioned between the conductor and the housing to separate signal and frame grounds, utilizing a nickel-plated surface for enhanced noise filtering, effectively preventing noise emission by increasing surface resistance and reducing noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a CAN-type EML element is used to reduce cost, then manufacturing cost is reduced, but the signal ground and frame ground cannot be separated, violating apparatus specifications and failing to achieve EMI suppression
Solution Approach 1:
The patent introduces a ceramic board as an intermediary component between the CAN-type EML element and the housing. This ceramic board serves as a mediator that provides separate ground paths, enabling the signal ground and frame ground to be separated even when using the cost-effective CAN-type EML element, thus resolving the contradiction between cost reduction and EMI suppression capability
Solution Approach 2:
The patent segments the ground path by introducing a ceramic board with separate ground terminals. The signal ground and frame ground are physically separated through this segmented structure, allowing independent grounding paths while maintaining the use of inexpensive CAN-type EML elements, thereby resolving the contradiction between manufacturing cost and EMI suppression
2Object-affected harmful factors
If the optical component and housing are electrically grounded to suppress EMI, then noise emission is reduced, but the signal ground integrates with the frame ground, violating apparatus specifications
Solution Approach 1:
The ceramic board acts as an intermediary that enables selective electrical connections. It provides a controlled path for the signal ground to connect to the housing while maintaining separation from the frame ground, thus allowing EMI suppression through grounding without violating the ground separation specification
Solution Approach 2:
The patent applies local quality by providing different grounding characteristics at different locations. The ceramic board enables the signal ground to be electrically connected to the housing at specific points for EMI suppression, while maintaining electrical separation from the frame ground, thus achieving both noise reduction and specification compliance through localized grounding quality
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 allows for effective separation of signal and frame grounds, achieving the desired EMI characteristic by suppressing noise emission and maintaining cost-effectiveness by using CAN-type EML elements instead of more expensive box-type elements.
Implementation Method 1
a sheet-like insulator that is disposed between the conductor and the housing such that a main surface thereof is positioned along an inner wall of the housing and separates the signal ground and the frame ground on the housing side from each other
Implementation Method 2
a sheet-like wave absorber disposed between the conductor and the housing such that a main surface thereof is positioned along an inner wall of the housing, and separating the signal ground and a frame ground on the side of the housing from each other
Implementation Method 3
utilizing a nickel-plated surface for enhanced noise filtering, effectively preventing noise emission by increasing surface resistance and reducing noise transmission
Data Source
AI summary
An optical transceiver includes an optical component (3) whose ground is integrated with a signal ground. The optical transceiver includes a conductor (51) that is electrically connected to the optical component (3), and a sheet-like insulator (52) disposed between the conductor (51) and a housing (1) such that a main surface thereof is positioned along an inner wall of the housing (1), and separating the signal ground and a frame ground on the side of the housing (1) from each other.