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Pulse-train generation through modulational instability in intracavity second-harmonic generation.

S Trillo, M Haelterman

|October 31, 2009

Summary

This summary is machine-generated.

We found that second-harmonic generation in a cavity can become unstable due to dispersion. This instability can lead to the creation of stable, solitary pulse trains in monostable operation.

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Area of Science:

Nonlinear optics
Cavity optics
Laser physics

Background:

Second-harmonic generation (SHG) is a fundamental nonlinear optical process.
Cavity-enhanced nonlinear processes are crucial for many photonic applications.
Understanding instability dynamics in optical cavities is key for controlling light generation.

Purpose of the Study:

To investigate the impact of dispersion on the stability of second-harmonic generation within an optical cavity.
To identify potential instabilities and their influence on pulse formation.
To explore the conditions leading to the generation of stable solitarylike pulse trains.

Main Methods:

Theoretical analysis incorporating chromatic dispersion.
Modeling of second-harmonic generation dynamics in a resonant cavity.
Analysis of modulation instability and self-pulsing phenomena.

Main Results:

Dispersion can induce modulation instability in cavity-based second-harmonic generation.
In the monostable regime, modulation instability can dominate over self-pulsing.
Stable, solitarylike pulse trains can be generated under these unstable conditions.

Conclusions:

Dispersion plays a critical role in the stability of nonlinear optical cavities.
Modulation instability offers a pathway to generating novel pulse formats.
The findings provide insights for designing advanced optical sources based on cavity SHG.