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Pump-probe switching in gain-switched lasers.

R White, I McKinnie

    Optics Express
    |April 23, 2009
    PubMed
    Summary

    We discovered a new pump-probe switching effect in gain-switched vibronic lasers. This phenomenon, observed under dual pulse excitation, is explained by a novel rate equation model, paving the way for new laser applications.

    Area of Science:

    • Optics and Photonics
    • Laser Physics
    • Nonlinear Optics

    Background:

    • Gain-switched vibronic lasers are crucial for tunable laser generation.
    • Understanding laser dynamics under pulsed excitation is essential for advanced applications.
    • Dual pulse excitation offers unique control over laser output characteristics.

    Purpose of the Study:

    • To report and explain a novel pump-probe switching phenomenon in gain-switched vibronic lasers.
    • To investigate the underlying mechanism of this switching behavior.
    • To explore the sensitivity of the switching to excitation parameters.

    Main Methods:

    • Development of a spatio-temporal rate equation model.
    • Numerical simulations of laser dynamics under dual pulse excitation.

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  • Analysis of energy storage and extraction processes.

    • Main Results:

    • Observation of a novel pump-probe switching phenomenon.
    • Identification of the mechanism responsible for switching via the rate equation model.
    • Prediction and investigation of switching in a Cr:forsterite laser system.
    • Characterization of sensitivity to pump/probe fluences and temporal separation.

    Conclusions:

    • The study reveals a new switching mechanism in vibronic lasers.
    • The developed model accurately predicts and explains the observed phenomenon.
    • Findings are relevant for controlling and optimizing pulsed laser systems.