Electrically injected first-order gratings broken Parity-Time symmetry DFB lasers: insight on device design rules and experimental results

Y Liang (1) , Q Gaimard (1) , J R Coudevylle (1) , A Garreau (2) , A Wilk (2) , O Delorme (2) , H Benisty (3) , A Ramdane (1) , A Lupu (1)

1 C2N - Centre de Nanosciences et de Nanotechnologies
2 III-V Lab
3 Laboratoire Charles Fabry / Nanophotonique

We address the problem of the optimal design of first-order Parity-Time symmetric Bragg grating for the distributed feedback laser diodes operation. It is shown that the optimal design grating is not that corresponding to the exceptional point where the perfect unidirectional reflectivity condition is met. It is rather that corresponding to the broken Parity-Time symmetry phase where the reflection asymmetry is still playing in important role. We also present experimental results on the electrically injected DFB lasers based on such design.

Domaines: Sciences de l'ingénieur [physics]

Y Liang, Q Gaimard, J R Coudevylle, A Garreau, A Wilk, et al.. Electrically injected first-order gratings broken Parity-Time symmetry DFB lasers: insight on device design rules and experimental results. META 2023, 2023. ⟨hal-04481788⟩