Passive coherent beam combining of quantum-cascade lasers with a Dammann grating
Résumé
An external cavity using a binary phase grating has been developed to achieve coherent combining of five quantum-cascade lasers emitting at 4.65 μm. The grating phase profile is designed to combine five beams of equal intensities into a single beam with a good efficiency (~75%). The performances of this cavity concerning output power, stability, combining efficiency and beam quality are detailed. We report a CW combining efficiency of 66% corresponding to an output power of ~ 0.5 W with a good beam quality (M² < 1.6)
Domaines
Optique [physics.optics]
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...