2018/12/05 by Bofeng Zhu, B. F. Zhu, Q. J. Wang +2
Mathematics · Physics and Astronomy · #Advanced Fiber Laser Technologies #Algorithm #Combinatorics #Computer science #Hermitian matrix #Laser #Mathematics #Mode (computer interface) #Nonlinear Photonic Systems #Nonlinear system #Optics #Physics #Quantum Mechanics and Non-Hermitian Physics #Quantum mechanics #Resonator #Saturation (graph theory) #Zero (linguistics) #physics.optics
paper · pdf · doi:10.1103/physreva.99.033829
published as Phys. Rev. A 99, 033829 (2019) · 4 pages, 3 figures
arxiv created 2018/12/05 · openalex created_date 2018/12/11 · openalex publication_date 2019/03/15 · arxiv updated 2019/03/27 · openalex updated_date 2026/08/05
A laser consisting of two independently pumped resonators can exhibit mode bifurcations that evolve out of the exceptional points (EPs) of the linear system at threshold. The EPs are non-Hermitian degeneracies occurring at the parity--time-reversal (PT) symmetry-breaking points of the threshold system. Above threshold, the EPs become bifurcations of the nonlinear zero-detuned laser modes, which can be most easily observed by making the gain saturation intensities in the two resonators substantially different. Small pump variations can then switch abruptly between different laser behavior, e.g., between below-threshold and PT-broken single-mode operation.