First Evaluation of Proton Irradiation Effects on InAs/InP Quantum Dash Laser Diodes Emitting at 1.55 $\mu\hbox {m}$

Quantum dash lasers were irradiated for the first time, using 31-MeV protons. These novel structures, which show promising performances for 1.55 mum optical communications exhibit better robustness to radiation than quantum well lasers.