Diode laser with housing

A diode laser comprising:

• a first laser arrangement comprising:
• at least two laser bars arranged offset with respect to one another in a direction x in parallel yz-planes, wherein each laser bar comprises at least two emitters arranged offset with respect to one another in a direction y and each having a light exit facet, which emit a laser radiation in a main radiation direction z;
• and at least two heat conducting bodies;
• at least one further laser arrangement comprising:
• at least two laser bars arranged offset with respect to one another in a direction x in parallel yz-planes, wherein each laser bar comprises at least two emitters arranged offset with respect to one another in a direction y and each having a light exit facet, which emit a laser radiation in the main radiation direction z;
• and at least two heat conducting bodies;
• a multilayer substrate comprising at least one first electrically insulating layer and at least one first metallic layer, the multilayer substrate having a mounting surface in an xy-plane;
• a frame connected to the mounting surface via an electrically insulating first joining medium;
• and a window transparent to the laser radiation, which window is arranged at a distance from the light exit facets of the emitters and is connected to the frame via a second joining medium, wherein the at least one further laser arrangement is arranged alongside the first laser arrangement in a manner offset in a direction x and/or a direction y or the first laser arrangement and the further laser arrangements are arranged alongside one another in a manner offset in each case in a direction x and/or a direction y, wherein the diode laser has an interior delimited by the frame, the window and the first electrically insulating layer of the multilayer substrate, wherein the heat conducting body and the laser bars are arranged in the interior and the interior has an interior volume VI and the interior additionally has a component volume VB, and wherein the component volume is that proportion of the interior volume which is occupied by material in the solid state of matter, and the component volume is more than 50% of the interior volume;
• wherein the multilayer substrate has an inlet and an outlet for a coolant.

A method for producing a diode laser, the method comprising:

• providing at least two laser bars, each of the at least two laser bars comprising at least two emitters having a light exit facet, which emit a laser radiation;
• providing at least two metallic heat conducting bodies;
• providing a multilayer substrate comprising at least one first electrically insulating layer and at least one first metallic layer, wherein the multilayer substrate has a mounting surface;
• providing a frame;
• providing a window transparent to the laser radiation;
• connecting the laser bars among one another and/or to the heat conducting bodies, the laser bars being arranged substantially parallel to one another and having a common main radiation direction;
• connecting the heat conducting bodies to the mounting surface via an electrical insulating first joining medium;
• connecting the frame to the mounting surface;
• and connecting the window to the frame, wherein the diode laser has an interior delimited by the frame, the window and the first electrically insulating layer of the multilayer substrate, wherein the heat conducting bodies and the laser bars are arranged in the interior and the interior has an interior volume VI and the interior additionally has an empty volume, and wherein the empty volume is that proportion of the interior volume which is occupied by material in the gaseous state of matter or by vacuum, and the empty volume being less than 50% of the interior volume;
• wherein the multilayer substrate has an inlet and an outlet for a coolant.