Source: ResearchGate

Numerical Simulation of Pulse Propagation

Understanding Active Mode Locking

In active mode-locking, a laser resonator setup is used where a gain medium, a modulator, and an output coupler (OC) are employed. The gain medium amplifies light, the modulator controls the round-trip losses, and the OC allows a portion of the light to exit the resonator.

Simulation of Pulse Parameters

When simulating pulse propagation in such a setup, factors like the pulse duration, bandwidth, and losses play a crucial role. The pulse duration can be influenced by the characteristics of the gain medium and the modulator used.

Steady-State Pulse Duration

The steady-state pulse duration is an essential parameter in laser operation. The Kuizenga-Siegman theory provides a theoretical basis for predicting this value. Numerical simulations can then be compared to this theoretical value to validate the simulation results.

Temporal Pulse Profile

After a certain number of round trips in the resonator, the temporal pulse profile can be analyzed. This profile gives insights into how the pulse evolves over time within the laser resonator.

In conclusion, numerical simulations of pulse propagation in lasers provide valuable insights into the behavior of laser pulses in complex resonator setups. By comparing simulation results with theoretical predictions, researchers can validate their models and gain a deeper understanding of laser dynamics.

Source: Science
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