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Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

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Locking behavior of three coupled laser oscillators.

H Erzgräber¹, S Wieczorek, B Krauskopf

¹School of Engineering, Computing and Mathematics, University of Exeter, Exeter EX4 4QF, United Kingdom.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|October 2, 2009

Summary

This summary is machine-generated.

Stable single-frequency operation in three-laser arrays depends on coupling strength and frequency differences. The amplitude-phase coupling parameter (alpha) significantly influences locking regions, requiring specific detuning for low alpha and similar frequencies for high alpha.

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Area of Science:

Laser Physics
Nonlinear Optics
Optical Engineering

Background:

Achieving stable single-frequency operation in coupled laser arrays is crucial for various applications.
Understanding the complex dynamics of multi-oscillator systems is essential for laser design.

Purpose of the Study:

To investigate single-frequency operation and stable locking in a lateral array of three laser oscillators.
To analyze the influence of coupling strength, frequency detuning, and amplitude-phase coupling on locking behavior.

Main Methods:

Utilized the composite-cavity-mode approach to model the three-laser system.
Computed regions of stable locking in the parameter space of coupling strength and frequency detuning.

Main Results:

Identified nontrivial shapes for stable locking regions.
Demonstrated that locking regions are highly dependent on the amplitude-phase coupling parameter (alpha).
Found that for low alpha, locking requires significant frequency detuning of the central laser, while for high alpha, it necessitates weak to moderate coupling and similar frequencies for all lasers.

Conclusions:

The amplitude-phase coupling parameter critically determines the conditions for stable single-frequency operation in three-laser arrays.
Precise control over coupling strength and frequency detuning is necessary to achieve desired locking behavior based on the alpha parameter.