Simplified Semiconductor Laser Drive Circuit for Precise Pulsed Output
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Summary
Problems
Existing semiconductor laser drive circuits are complex, costly, and lack controllability, particularly in achieving stable high-intensity pulsed laser output with precise timing control, due to the separation of anode and cathode electrodes into gain and light absorption regions.
Innovation solutions
A semiconductor laser drive circuit with a shared cathode electrode between gain and light absorption regions, utilizing a switching element connected to ground to modulate laser output by adjusting the light absorption coefficient through resistance and capacitor configurations, allowing for single-switch Q-switch driving and reduced complexity.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the anode and cathode electrodes are separated into gain and light absorption regions, then the laser output intensity can be controlled, but the circuit complexity increases and controllability decreases
Why choose this principle:
The patent merges the cathode electrodes for the gain region and light absorption region into a single shared cathode electrode. This consolidation reduces the number of independent electrodes from four (separate anodes and cathodes for each region) to three (separate anodes but shared cathode), thereby simplifying the circuit structure while maintaining the ability to independently control laser output intensity through the switching element connected to the shared cathode.
Principle concept:
If separate anode and cathode electrodes are used for gain and light absorption regions, then region-specific control is achieved, but the number of components increases
Why choose this principle:
The patent combines the cathode electrodes into a single shared component that serves both the gain region and light absorption region. This merging reduces the total component count while preserving region-specific control capabilities through the switching element that can selectively modulate the cathode connection for laser output control.
Application Domain
Data Source
AI summary:
A semiconductor laser drive circuit with a shared cathode electrode between gain and light absorption regions, utilizing a switching element connected to ground to modulate laser output by adjusting the light absorption coefficient through resistance and capacitor configurations, allowing for single-switch Q-switch driving and reduced complexity.
Abstract
A semiconductor laser drive circuit includes: an anode electrode divided into at least one gain region and at least one light absorption region; a cathode electrode shared between the gain region and the light absorption region; and a resistance connected to the anode electrode of the light absorption region.