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Multistability and hysteresis phenomena in passive mode-locked lasers
1Institute of Automation and Electrometry, Russian Academy of Sciences, Novosibirsk 630090, Russia.
Summary
This study analyzes laser passive mode-locking, revealing a hysteresis effect where the number of pulses depends on initial conditions. This multistable laser operation is crucial for understanding complex light dynamics.
Area of Science:
- Nonlinear optics
- Laser physics
Background:
- Passive mode-locking is a key technique for generating ultrashort laser pulses.
- The complex Ginzburg-Landau equation is a standard model for describing nonlinear optical phenomena.
Purpose of the Study:
- To analyze laser passive mode-locking using a complex Ginzburg-Landau equation.
- To investigate the effects of saturable gain and intensity-dependent nonlinear losses.
Main Methods:
- Numerical analysis of the complex Ginzburg-Landau equation.
- Modeling laser dynamics with saturable gain and nonlinear loss terms.
Main Results:
- Discovered a hysteresis dependence of steady-state pulse number on pump power.
- Observed multistable laser operation, where pulse number depends on the initial state.
Conclusions:
- The laser system exhibits complex, multistable behavior due to nonlinear loss characteristics.
- Hysteresis and multistability are significant findings for laser design and operation.