| abstract |
The mini cavity comprises a parallelepipedal solid emitter (1b), electrically insulating, provided with two polished parallel side faces (6, 8), a monocrystalline substrate (2) and several monocrystalline layers epitaxied on the substrate and having in different directions parallel to said faces, a hardness equal to that of the substrate, one of the layers constituting a guide layer (4) capable of guiding the light emitted by the emitter and the pumping light and another layer (12) constituting a non-guiding protective layer , the protective layer and the substrate constituting two opposite faces of the emitter perpendicular to the side faces, laser activator ions being contained in the substrate and / or in one of the layers. In the case of an internal cavity, semi-reflecting mirrors (9, 10) are arranged on the side faces of the emitter. |