Laser Emission Control for Safe Optical Module Initialization

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Solution Overview

Problem

Existing optical systems face a laser safety concern due to high optical power emissions during system initialization, which can cause eye damage if not properly managed.

Innovation Solution

A firmware-based routine that controls the external light source module to set the laser power at a low level during initialization and transitions to high power only when the laser signal is properly coupled to the optics module, ensuring safe operation and preventing accidental exposure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If the external light source module is enabled during system initialization, then the laser can provide full optical power for normal operation, but high optical power emissions can cause eye damage to operators

Engineering Contradiction:

Improvelaser optical powerVSAvoideye damage risk

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary actions by establishing safe operational conditions before enabling full laser power. The firmware checks for proper fiber optic cable connection and optics module presence before allowing the external light source module to operate at full power, thereby preventing eye damage during initialization

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The laser power level is made dynamic rather than static. The external light source module operates at reduced power during initialization and only transitions to full power after safety conditions are verified. This dynamic power adjustment resolves the contradiction between providing sufficient optical power for operation and preventing harmful emissions during startup

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If a hardware optical assembly integrating the optics module and external light source module is used, then direct high optical exposure to human eyes is prevented, but the design becomes costly and difficult to manufacture

Engineering Contradiction:

Improvelaser exposure preventionVSAvoidmanufacturing complexity

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent replaces the mechanical/hardware integration solution with a firmware/software-based control system. Instead of physically integrating the optics module and external light source module into a single housing, the system uses firmware logic to control power delivery and verify connection status, achieving the same safety outcome with standard modular components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The firmware acts as an intermediary between the external light source module and the optics module. It mediates the power delivery by checking connection status and controlling the laser power level, thereby preventing direct exposure without requiring physical integration of components

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If the external light source module operates at full power during system interoperation period, then normal optical signal transmission is achieved, but eye safety issues arise if the fiber optic cable is not properly connected

Engineering Contradiction:

Improveoptical signal transmissionVSAvoideye safety

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system implements feedback control by monitoring the connection status between the fiber optic cable and the optics module. The firmware continuously checks whether the optics module is properly connected before allowing full laser power operation, and can detect disconnections during operation, thereby maintaining both productivity and safety

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The firmware performs preliminary verification of proper connection before enabling full laser power for optical signal transmission. This preliminary action ensures that the system only operates at full power when safe to do so, preventing eye damage while maintaining normal transmission capabilities

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12288960B2Method and system for control of laser emissions for safety

Publication Date: 2025.04.29 QUANTA COMPUTER INC

AI summary

A system and method for safe use of an optics assembly with an external light source and an optically coupled optics module is disclosed. The system includes an external light module emitting a continuous wave laser through an output port. An optics module has an input port and a memory. The optics module generates a modulated optical signal. The memory stores the power level of the continuous wave laser signal received by the optics module. An optical jumper is provided for coupling the output port with the input port. A communication bus is coupled between a controller and the external light source module. The controller sets the external light source at a low power level and transitions the external light source to a high power level when the stored power level of the continuous wave laser signal received by the optics module exceeds a predetermined level.