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

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Class A mode-locked semiconductor ring laser.

A Tierno¹, F Gustave, S Barland

¹Université de Nice Sophia Antipolis–CNRS, INLN–UMR7335, 1361 Route des Lucioles, 06150 Valbonne, France.

|June 5, 2012

Summary

This summary is machine-generated.

We demonstrated low-repetition-rate mode-locked operation in a semiconductor ring laser. This occurs due to coupled clockwise and counterclockwise pulses, paving the way for temporal cavity solitons.

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Area of Science:

Optics and Photonics
Semiconductor Lasers
Nonlinear Optics

Background:

Mode-locked lasers generate ultrashort pulses.
Semiconductor ring lasers offer unique properties for light generation.

Purpose of the Study:

To experimentally demonstrate low-repetition-rate mode-locked operation in a macroscopic semiconductor ring laser.
To investigate the underlying mechanisms of this operation mode.

Main Methods:

Utilizing a macroscopic semiconductor ring laser.
Constraining clockwise and counterclockwise emission directions to spatially overlap within the semiconductor medium.

Main Results:

Observed antiphase periodic pulses.
Interpreted the regime as a result of coupling and competition between the two emission directions.

Conclusions:

The demonstrated mode-locking regime is driven by directional coupling and competition.
The semiconductor ring laser is suitable for generating temporal cavity solitons due to its time constants and potential for unidirectional operation.