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Updated: Nov 1, 2025
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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
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Concurrent Passive Mode-Locked and Self-Q-Switched Operation in Laser Systems
J Guo1,2, S T Cundiff1, J M Soto-Crespo3
1Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, USA.
Physical Review Letters
|June 21, 2021
Summary
This study models concurrent passive mode-locking and self-Q-switching in lasers using a complex Ginzburg-Landau equation. Experimental results with a fiber ring laser closely match the model
Area of Science:
- Physics
- Optics
- Laser Technology
Background:
- Mode-locked lasers generate short pulses.
- Q-switched lasers produce high-energy pulses.
- Concurrent operation presents unique challenges.
Purpose of the Study:
- To model concurrent passive mode-locking and self-Q-switching.
- To compare theoretical predictions with experimental data.
Main Methods:
- Modeling using the complex cubic-quintic Ginzburg-Landau equation.
- Experimental investigation using a passively mode-locked fiber ring laser.
- Utilizing a waveguide array as a fast saturable absorber.
Main Results:
- Numerical simulations accurately predict pulse shapes.
- Experimental pulse shapes agree with theoretical models.
- Observed periodic pulse trains match simulation outcomes.
Conclusions:
- The complex cubic-quintic Ginzburg-Landau equation effectively models dual-mode laser operation.
- Experimental validation confirms the model's predictive power.
- This research advances understanding of advanced laser dynamics.
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