Multivariate optimization effectiveness model of single-longitudinal-mode laser under pre-laser Q-switching regime

Area of Science:

• Laser Physics
• Optical Engineering

Background:

• Q-switching is a technique used to obtain high-energy laser pulses.
• Controlling mode selection is crucial for optimizing laser output characteristics.

Purpose of the Study:

• To establish an optimal effectiveness model for system parameters in Q-switching lasers.
• To analyze composite mode selection and determine optimal pre-laser modulation intervals for single-longitudinal-mode output.

Main Methods:

• Developed an optimization function based on the pre-laser Q-switching technique.
• Solved rate equations with boundary conditions to analyze composite mode selection.
• Established an efficiency evaluation function to maximize single-pulse energy.

Main Results:

• Identified the specific pre-laser modulation time interval for single-longitudinal-mode laser output.
• Conducted an energy efficiency analysis of mode selection components.
• Validated the model's universality and predictive capabilities through simulation and experiments.

Conclusions:

• The established model accurately controls the pre-laser Q-switching process.
• The model reveals inherent relationships between parameters in composite mode selection.
• The model enables prediction and adjustment of single-longitudinal-mode Q-switching laser output characteristics under high pump injection.