Abstract: The device is provided with at least one laser diode (2) and two electric connecting members for connection to an electric power supply (8) for supplying said at least one laser diode. It includes two elements (14, 16) which can be elastically deformed or moved, which are conductive electrically and arranged in a base electrically insulated from the two connecting members. The two elastically deformable or moveable elements are electrically connected and arranged so as to abut against two respective contact surfaces (34, 36) of the two connecting members when the device is not connected to said power supply by means of an external connector (40) which is complementary to the two electric connecting members. The two elastically deformable or moveable elements are respectively separated from the two connecting members when the external connector is introduced or are able to be respectively separated from said two connecting members when the external connector is introduced.

Abstract: A laser (1) has its laser head (3) connected to its base (2) by hinges having a common axis (R) parallel to the laser beam axis (4a). When the lamp for energizing the laser rod must be replaced, the head (3) can be pivoted about the axis (R) to a position in which the lamp can easily be removed from its cavity and a new lamp fitted therein, the removal and fitting being accomplished by moving the lamps along their axis (5a).

Abstract: A laser has a slab in which the beam F is propagated in zig-zag manner between two opposing faces which have the property of ensuring total reflection. For this purpose each of these faces is covered with a solid layer of a good heat conducting material and having a refractive index below that of the slab. Its thickness is preferably greater than three times the operating wavelength of the laser. Thus, a cooling fluid can be in contact with the solid layer to effectively cool the slab. Pumped energy sources are preferably provided opposite the layers.