Abstract: The invention relates to a method for creating an image on a surface or in a volume of a part (9), the image comprising a repetition of a pattern (11), the method comprising the following steps: —creating the pattern (11) on the surface or in the volume of the part (9) by shaping and focusing a coherent beam (8A), the pattern comprising at least two local contrast maxima; —carrying out a cycle of the following steps at least once: —moving the beam and the part relative to one another, and —creating the pattern (11) on the surface or in the volume by shaping and focusing the beam such that the patterns created do not overlap. The invention also relates to a system for creating an image on a surface or in a volume of a part using the method.

Abstract: The invention relates to an optical pumping device (12). This device (12) comprises at least one thin layer (13) having a given volume, produced on an active material base doped with laser ions. The device (12) also comprises at least one pump beam (19) having a cross section of given dimensions, of a wavelength selected to be able to place the laser ions of the active material in an excited state. This pump beam (19) enters at an entry point (47) in the layer (13) with an angle of incidence (?p), forming at least one optical gain zone (20) in the layer (13). The zone (20) has a volume less than the volume of the layer (13) and a positioning in the layer (13) that are adjustable by means of the entry point (47), the dimensions of the cross section of the pump beam (19) and the angle of incidence (?p).