Flattening of the spatial laser beam profile with low losses and minimal beam divergence

Vincent Kermène (1) , Alain Saviot , Michel Vampouille (1) , Bernard Colombeau (1) , Claude Froehly (1) , T. Dohnalik

1 IRCOM - Institut de Recherche en Communications Optiques et Microondes

A new type of Nd:YAG laser is described that uses two spatial filters that are placed against the mirrors in the focal planes of a converging lens (Fourier planes). With the appropriate filters, we experimentally obtained a uniphase beam with a flat spatial profile and minimal beam divergence in the free-running regime.

Domaines: Sciences de l'ingénieur [physics]; Optique / photonique

Vincent Kermène, Alain Saviot, Michel Vampouille, Bernard Colombeau, Claude Froehly, et al.. Flattening of the spatial laser beam profile with low losses and minimal beam divergence. Optics Letters, 1992, 20, ⟨10.1364/OL.17.000859⟩. ⟨hal-01278195⟩