Patent ID: 11876343
Assignee: TRUMPF PHOTONICS, INC.
Field: Optics (Instruments)
Classification: CPC H | IPC H

Claim 14:
15. A laser diode assembly comprising:
a heat sink comprising an edge extending along a horizontal direction;
a plurality of electrical contact pads spaced apart from one another along the horizontal direction on the heat sink;
a plurality of submounts spaced apart from one another along the horizontal direction on the heat sink, each submount of the plurality of submounts being positioned on a different corresponding electrical contact pad of the plurality of electrical contact pads;
a plurality of laser diodes, each laser diode comprising a corresponding active layer between a first-type doped semiconductor layer and a second-type doped semiconductor layer and being configured to emit a light beam from a facet of the laser diode, a bottom side of each laser diode being positioned on a different corresponding submount of the plurality of submounts, the facets of the plurality of laser diodes being aligned with and adjacent to the edge of the heat sink, the plurality of laser diodes being electrically connected in series,
wherein a corresponding submount and a corresponding laser diode are sequentially positioned on each electrical pad of the plurality of electrical contact pads along a vertical direction perpendicular to the horizontal direction, and
wherein the plurality of laser diodes are configured to emit the light beams from the facets of the plurality of laser diodes along a third direction perpendicular to a plane defined by the horizontal direction and the vertical direction, fast axes of the light beams being collinear along the vertical direction, slow axes of the light beams being collinear along the horizontal direction;
for each laser diode of the plurality of laser diodes, a fast-axis collimating (FAC) lens configured to collimate the light beam along the fast axis of the light beam;
for each last diode of the plurality of laser diodes, a reflecting mirror arranged downstream the FAC lens to receive light from the FAC lens; and
an optical combiner, wherein each reflecting mirror is configured to reflect light received at the reflecting mirror to the optical combiner,
wherein the optical combiner is configured to optically stack light beams received at the optical combiner along the vertical direction.