Spatial shaping of coherent waves inside a confocal laser

Bernard Colombeau (1) , Michel Vampouille (1) , Vincent Kermène (1) , Agnès Desfarges-Berthelemot (1) , Claude Froehly (1)

1 IRCOM - Institut de Recherche en Communications Optiques et Microondes

Unusual laser modes can be selected by inserting a pair of mutually matched spatial filters in the Fourier planes of a confocal laser resonator. Experiments using a Nd:YAG laser in the free-running regime show the suitability of the proposed modal filtering technique for synthesis or reconstruction of various laser patterns. Their stability is investigated by space-time streak-camera observations of laser emission.

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

Bernard Colombeau, Michel Vampouille, Vincent Kermène, Agnès Desfarges-Berthelemot, Claude Froehly. Spatial shaping of coherent waves inside a confocal laser. Pure and Applied Optics, 1994, 3. ⟨hal-01278142⟩