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Controlling Nonlinear Interaction in a Many-Mode Laser by Tuning Disorder.

Yaniv Eliezer¹, Simon Mahler², Asher A Friesem²

¹Department of Applied Physics, Yale University, New Haven, Connecticut 06520, USA.

Physical Review Letters

|April 27, 2022

Summary

This summary is machine-generated.

Researchers developed a novel method using random phase fluctuations in lasers to control many-body physics. This technique allows for precise tuning of interaction strength, enabling more modes to lase and offering a flexible platform for studying complex phenomena.

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Area of Science:

Nonlinear optics
Many-body physics
Laser physics

Background:

Many-mode lasers with nonlinear modal interactions are valuable for studying many-body physics.
Controlling interaction strength in such systems over a wide range is a significant challenge.

Purpose of the Study:

To present a novel method for controlling lasing mode structures.
To enable precise and continuous tuning of interaction strength in many-mode lasers.

Main Methods:

Introducing random phase fluctuation to a nearly degenerate laser cavity.
Numerical simulations and experimental validation.

Main Results:

Decreasing the characteristic scale of phase fluctuation fragmented transverse modes.
Reduced spatial overlap of modes suppressed modal competition for gain.
More lasing modes were observed with the controlled phase fluctuation.

Conclusions:

The developed system offers tunability, flexibility, and robustness for investigating many-body phenomena.
This method provides a powerful platform for advancing research in complex physical systems.