to the present invention identical in its basic principle with the two embodiments described above but in which laser amplifying medium 40 consists of a second part 42 of a 34 laser plate 34 whose first part 41 constitutes the pilot laser generator itself for example an nd yag in that case the laser plate is of a relatively large section and the amplification is obtained by a multipassage in second part 42 of the beam deflected by deflector 47 this multipassage being achieved by the multiple reflections on mirrors 43 or total reflection prisms outside of the laser plate in the embodiment illustrated second part 42 of laser plate 40 is passed through six times by the part of deflected pilot laser beam 45 one of the advantages of this configuration is that it makes it possible to obtain with a relatively short laser plate a very long amplifying medium for example of a triple length for the embodiment illustrated in fig3 these three structures for a laser generator according to the invention make it possible to obtain a self correction of the phase distortions induced in any large gain amplifying medium in particular by the effect of a thermal lens the conjugate wave is generated in an exacting way in the same direction as the incident wave even for an angular deflection equal to u00b1 30 u00b0 the angular deflection of the low energy pilot beam is transferred to the power beam and the deflected amplified wave has the same spatial qualities as the incident pilot wave the configurations described are compatible of course with.