Non-hermitian dynamics in delay coupled semiconductor lasers

Andrew Wilkey; Yogesh Joglekar; Joseph S. Suelzer; Gautam Vemuri

doi:10.1117/12.2523786

5 September 2019 Non-hermitian dynamics in delay coupled semiconductor lasers

Andrew Wilkey, Yogesh Joglekar, Joseph S. Suelzer, Gautam Vemuri

Proceedings Volume 11081, Active Photonic Platforms XI; 110810G (2019) https://doi.org/10.1117/12.2523786
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

This paper describes our work on the realization of a non-hermitian Hamiltonian system in time-delay coupled semiconductor lasers consisting of two identical lasers, operated with a small frequency detuning between them, and bidirectionally coupled to each other through optical injection. The effective Hamiltonian for this system is non-hermitian, and, under some assumptions and conditions, reminiscent of two-site paritytime (PT) symmetric Hamiltonians, a topic that is under intense investigation. The dynamical response of the intensity of the lasers as a function of the detuning between them reveals characteristics of a PT symmetric system, and our emphasis is on the features that arise from the delayed coupling. Experimental measurements are in good agreement with numerical simulation of the nonlinear rate equation model that describes the coupled system.

Conference Presentation

Citation Download Citation

Andrew Wilkey, Yogesh Joglekar, Joseph S. Suelzer, and Gautam Vemuri "Non-hermitian dynamics in delay coupled semiconductor lasers", Proc. SPIE 11081, Active Photonic Platforms XI, 110810G (5 September 2019); https://doi.org/10.1117/12.2523786

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