Optical Transceiver Calibration With Airflow and Self-Heating Control
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Solution Overview
Problem
Modern automatic test equipment (ATE) systems are not configured to rapidly test and calibrate hybrid high-speed devices like optical transceivers, which combine complex electrical and optical modules, due to difficulties in interfacing with fragile components and inefficient temperature control methods that can damage the devices.
Innovation Solution
A hybrid optical-electrical ATE system using airflow cooling and collateral device heat to maintain the device's temperature during calibration, with a closed-loop control system that adjusts airflow and activates non-active components to generate heat, allowing for precise temperature control without physical contact or external cooling structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional ATE systems are used to test optical transceivers, then electrical testing can be performed, but the system cannot rapidly test and calibrate both electrical and optical components simultaneously
Solution Approach 1:
The patent combines electrical ATE and optical ATE into a single hybrid ATE system that can simultaneously test both electrical and optical components of optical transceivers. The system integrates electrical interfaces for electrical components and optical interfaces for optical components, enabling unified rapid testing and calibration of hybrid devices that traditional separate systems cannot achieve.
2Temperature
If external cooling structures are used to control device temperature during calibration, then temperature control can be achieved, but the fragile components may be damaged
Solution Approach 1:
The patent uses the device's own operational components as heat sources for temperature control during calibration. Non-active optical components (such as lasers, modulators, or amplifiers) are activated to generate heat that raises the device temperature to the desired calibration level. This self-heating approach eliminates the need for external heating structures that could damage fragile components, as the heat is generated internally by the device itself during normal operation.
3Temperature
If physical contact methods are used for temperature control, then cooling can be achieved, but the fragile optical components may be damaged
Solution Approach 1:
The patent replaces mechanical contact-based cooling structures with a contactless airflow cooling system. A flow of cool air is directed onto the device surface to remove excess heat and maintain temperature during calibration. This pneumatic cooling method eliminates physical contact between cooling apparatus and the device, preventing damage to fragile optical components while achieving effective temperature control.
4Productivity
If conventional ATE systems are used, then electrical testing is possible, but rapid calibration of hybrid high-speed devices cannot be achieved
Solution Approach 1:
The patent creates a universal hybrid ATE system that can handle both electrical and optical testing functions through a single integrated platform. The system includes configurable interfaces that can be adapted to different device types and testing requirements, enabling rapid calibration of various hybrid high-speed devices without requiring separate specialized equipment for each device type or test scenario.
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
Enables efficient and non-destructive calibration of optical transceivers by maintaining stable temperatures across a range, ensuring reliable operation across various temperatures, thus addressing the limitations of existing ATE systems in handling hybrid devices.
Implementation Method 1
a flow of cool air is directed onto the device under test to remove heat
Implementation Method 2
non-active optical components are provided with electrical current to raise the temperature of the device under test to a desired calibration level
Data Source
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AI summary
An optical-electrical device can implement a feedback-based control loop for temperature of the device during component calibration. The optical-electrical device can implement compressed air to vary the device temperature during calibration. Additionally, non-active components of the device can be provided current to vary the temperature of the device in concert with the provided compressed air. Additional calibration temperatures can be implemented by activating and deactivating additional non-active components in the device, such as light sources, optical amplifiers, and modulators.