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

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Optical Kinetic Theory of Nonlinear Multimode Photonic Networks.

Arkady Kurnosov¹, Lucas J Fernández-Alcázar^2,3, Alba Ramos^2,3

¹Department of Physics, Wave Transport in Complex Systems Laboratory, Wesleyan University, Middletown, Connecticut 06459, USA.

Physical Review Letters

|May 28, 2024

Summary

This summary is machine-generated.

We developed a new theory for multimode nonlinear photonic circuits (MMNPCs) describing nonequilibrium transport. This universal theory covers all regimes, including negative optical temperatures, and offers insights for optical cooling.

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Area of Science:

Nonlinear optics
Photonic circuits
Thermodynamics

Background:

Recent advances in multimode nonlinear photonic circuits (MMNPCs) necessitate new theoretical frameworks.
Existing theories primarily address equilibrium properties, leaving nonequilibrium transport unaddressed.

Purpose of the Study:

To develop a nonequilibrium transport theory for MMNPCs in contact with thermal reservoirs.
To establish a universal scaling theory applicable across different transport regimes.

Main Methods:

Combined Landauer and kinematics formalisms.
Developed a one-parameter scaling theory.

Main Results:

The theory describes transport from ballistic to diffusive regimes.
Includes scenarios with both positive and negative optical temperatures.
Derived a photonic Wiedemann-Franz law relating thermal and power conductivities.

Conclusions:

Paves the way for fundamental understanding of MMNPC transport properties.
Potential applications in designing all-optical cooling protocols.