Laser Output Control Device Using Proximity Sensor for Safety
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Solution Overview
Problem
Current laser output control methods face compatibility issues due to manufacturer-specific handshake mechanisms between optical transceivers, leading to potential exposure of human eyes to strong laser radiation when fibers are not connected.
Innovation Solution
A laser output control device comprising a luminous source, proximity detector, optical processing circuit, and microcontroller that detects and processes reflection intensity to regulate laser output, preventing strong laser emission when no fiber is connected, thus enhancing safety and compatibility across different transceiver manufacturers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If handshake mode is used to control laser output, then laser safety can be improved, but device complexity increases and compatibility issues arise between different manufacturers
Solution Approach 1:
The patent extracts the safety detection function from the complex handshake protocol by implementing a dedicated proximity sensor that independently detects fiber presence. This separates the safety function from the communication handshake, simplifying the overall system while maintaining safety.
Solution Approach 2:
The proximity sensor acts as an intermediary component between the laser source and the fiber interface. It provides direct physical presence detection without requiring communication protocols, serving as a mediator that enables safety control independent of manufacturer-specific handshake mechanisms.
2Reliability
If manufacturer-specific handshake protocols are implemented, then laser safety control can be achieved, but adaptability across different manufacturers deteriorates
Solution Approach 1:
The proximity sensor provides a universal safety mechanism that works across all optical transceivers regardless of manufacturer. By using a physical presence detection method rather than protocol-based handshake, the system achieves multi-functionality and broad compatibility while maintaining laser safety control.
3Object-affected harmful factors
If laser output is restricted when fiber is not connected, then human eye safety is improved, but the complexity of output control mechanisms increases
Solution Approach 1:
The proximity sensor performs preliminary detection of fiber presence before the laser is activated. By detecting whether a fiber is physically connected in advance, the system can prevent harmful laser radiation from being emitted when no fiber is present, eliminating the need for complex control mechanisms.
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
Effectively restricts laser output energy to prevent eye exposure and ensures safe usage by determining fiber connection status without relying on specific handshake protocols, enhancing security and compatibility across various optical transceivers.
Implementation Method 1
a proximity detector configured to detect and capture the reflection intensity of the luminous beam from the luminous source at the optical interface
Data Source
AI summary
A laser output control method and a laser output control device, including a luminous source in the optical interface of an optical transceiver, a proximity detector configured to detect and capture reflection intensity of a luminous beam from the luminous source, an optical processing circuit electrically connected to the proximity detector and configured to receive and process the reflection intensity, and a microcontroller configured to capture parametric information of the reflection intensity, are disclosed. The microcontroller is also electrically connected to a laser driver, to receive parametric information of the optical processing circuit and to regulate the laser and/or laser driver activity based on the parametric information. The laser output control device may effectively restrict the laser output activity and the total laser output energy, which may prevent exposing human eyes to relatively strong laser energy and enhance the security of laser usage and protection for the human body.