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Updated: Jun 30, 2026

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses

Published on: July 2, 2012

Decoherence and Turbulence Sources in a Long Laser.

Amy Roche¹, Svetlana Slepneva¹, Anton Kovalev²

¹Department of Physical Sciences, Munster Technological University, Cork, Ireland.

Physical Review Letters

|August 18, 2023

Summary

In long delay lasers, photon statistics evolve from thermal to Poissonian, creating power dropouts. Persistent dropouts form coherent structures, leading to turbulent dynamics and decoherence.

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Area of Science:

Nonlinear optics
Laser physics
Complex systems

Background:

Understanding laser dynamics is crucial for developing advanced optical technologies.
The turn-on process in lasers with long delay times presents unique theoretical challenges.
Photon statistics provide insights into the quantum and classical behavior of light emission.

Purpose of the Study:

To investigate the laser turn-on dynamics in the long delay limit.
To analyze the evolution of photon statistics and identify emergent phenomena.
To characterize the nature and impact of coherent structures on laser behavior.

Main Methods:

Theoretical modeling using delay differential equations.
Numerical simulations of laser cavity dynamics.
Analysis of photon statistics and coherence time evolution.

Main Results:

Observed universal evolution of photon statistics from thermal to Poissonian.
Identified power dropouts, with some persisting to form coherent structures (dark solitons/Nozaki-Bekki holes).
Demonstrated that coherent structure collisions induce turbulent dynamics and decoherence.

Conclusions:

Coherent structures play a key role in long-delay laser dynamics, bridging distinct emission domains.
Laser coherence time is significantly affected by collisions between these structures.
The complex Ginzburg-Landau equation and delay differential equations effectively model this complex behavior.