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Article Dans Une Revue IEEE Journal of Quantum Electronics Année : 2019

Parity-Time Symmetry in Laterally Coupled Bragg Waveguides

Résumé

We investigate theoretically, in the frame of Coupled-Mode Theory (CMT), a system made of two laterally coupled, perfectly phase-matched, index-coupled Bragg waveguides, the modal gain of the amplifying one compensating exactly the modal losses of the other. Reverting to the supermode eigenbasis of the underlying “naked” (non-periodic) Parity-Time Symmetric (PTS) directional coupler, we derive analytically the scattering parameters of the whole structure. We also consider a system made of two purely gain-coupled Bragg waveguides, either in phase or in anti-phase. In each case, we comment upon the gain requirement for achieving a laser oscillation.
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Dates et versions

hal-02464554 , version 1 (03-02-2020)

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Yann Boucher, Patrice Feron. Parity-Time Symmetry in Laterally Coupled Bragg Waveguides. IEEE Journal of Quantum Electronics, 2019, 55 (6), pp.6000209. ⟨10.1109/JQE.2019.2947566⟩. ⟨hal-02464554⟩
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