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Polarization chaos in an optically pumped laser.

C Serrat, A Kul'minskii, R Vilaseca

|October 29, 2009

Summary

This summary is machine-generated.

Researchers discovered polarization chaos in a J=0?J=1?J=0 laser system. This laser exhibits unique polarization locking under steady-state conditions but displays instabilities and chaos when intensity fluctuations occur.

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Area of Science:

Atomic, Molecular, and Optical Physics
Laser Physics
Nonlinear Dynamics

Background:

Optically pumped lasers with J=0?J=1?J=0 transitions are fundamental systems for studying light-matter interactions.
Anisotropic gain and polarization dynamics are crucial phenomena in laser operation.
Ring cavities and magnetic fields introduce complexities in laser behavior.

Purpose of the Study:

To investigate the steady-state and dynamic behavior of an optically pumped J=0?J=1?J=0 laser.
To analyze the influence of an axial magnetic field and isotropic ring cavity on laser polarization.
To identify the conditions leading to polarization instabilities and chaos.

Main Methods:

Theoretical study of laser dynamics using rate equations or similar models.
Analysis of steady-state solutions to understand polarization locking.
Investigation of dynamic behavior to identify instabilities and chaotic regimes.
Numerical simulations to explore parameter space and validate theoretical predictions.

Main Results:

The laser exhibits polarization locking in the steady state, aligning with the pump field's linear polarization.
Gain anisotropy induced by the pump field is responsible for this polarization locking.
In the presence of laser intensity instabilities, polarization locking is lost, leading to polarization instabilities.
For the first time, polarization chaos has been observed in this laser system.

Conclusions:

The J=0?J=1?J=0 laser system demonstrates complex polarization dynamics.
Polarization chaos is a novel phenomenon in this type of laser, linked to intensity instabilities.
Understanding these dynamics is crucial for developing advanced laser applications and controlling laser output.