Double Optical Filtered Feedback and PT-Symmetry Breaking Induced Nonlinear Dynamics in Semiconductor Lasers

Thursday, 11 February 2016 - 3:00pm - 4:30pm
Refreshments at 3:00pm in the Physics Conference Room, LD 154B; event at 3:30pm in LD 010

Abstract: Optically coupled semiconductor lasers continue to fascinate researchers across many disciplines. This attraction persists because of the semiconductor laser's ability to capture a myriad of nonlinear dynamical behaviors. In this talk, I will discuss our ability to probe different dynamical regimes, in particular, microwave generation and time-delayed PT-symmetry breaking. The first part of the talk will introduce the subject of filtered optical feedback which is used to elicit frequency dynamics. I will describe our experiment which utilizes two external feedback cavities and, as a consequence, the effects of two time-delays on this system. I will also present the experimental realization of PT-symmetry breaking in coupled semiconductor lasers. Finally, I will discuss the effects of time-delayed coupling on the symmetry breaking.


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