laser device with semiconducting diodes . the invention concerns a device with semiconducting laser diodes comprising individual wafers , made of a good heat - conducting material , assembled parallel to one another with semiconducting diode connector bars placed between them as braces , said connector bars only taking up a longitudinal portion of the spaces between the wafers , in which they are located , and the longitudinal portions of said spaces between the wafers , not taken up by said semiconducting connector bars , being used as flow channels for a cooling fluid .