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Polarization temporal dynamics in a dye microlaser.

A Aiello, F De Martini, P Mataloni

|October 30, 2009

Summary

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We studied dye microlaser polarization dynamics under femtosecond excitation. Dipole angular diffusion significantly impacts microlaser pulse formation, aligning experimental findings with theoretical models.

Area of Science:

Optics and Photonics
Laser Physics
Physical Chemistry

Background:

Dye microlasers offer tunable emission for various applications.
Understanding transient dynamics is crucial for optimizing laser performance.
Femtosecond excitation introduces complex temporal effects in laser operation.

Purpose of the Study:

To investigate the temporal dynamics of output polarization in a dye microlaser.
To explore the role of dipole angular diffusion in transient microlaser operation.
To compare experimental results with a theoretical model under varying conditions.

Main Methods:

Experimental setup utilizing femtosecond laser excitation.
Measurement of microlaser threshold and buildup time.

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Systematic variation of microcavity length and polarization angle.

Use of dye solutions with different viscosities.

Main Results:

Observed significant influence of dipole angular diffusion on microlaser pulse formation.
Measured threshold and buildup times under transient conditions.
Demonstrated adequate agreement between experimental data and theoretical predictions.
Highlighted the effect of solution viscosity on laser dynamics.

Conclusions:

Dipole angular diffusion is a key factor in transient dye microlaser dynamics.
The theoretical model accurately describes the observed temporal polarization behavior.
Microcavity parameters and solution properties influence microlaser performance.