Trumpf Photonics, Inc.

Trumpf Laser Gmbh

Rogers Germany Gmbh

Thilo Vethake

Stefan Heinemann

Alexander Killi

Viorel C Negoita

Christoph Tillkorn

Ulrich Bonna

Steffen Ried

Klaus Wallmeroth

Martin Liermann

Vincent Kuhn

Stephan Strohmaier

Yufeng Li

Heiko Schweiger

Suhit Ranjan Das

Haiyan An

Jeffrey Eisenmann

Johannes Wiesend

Tobias Barnowski

Le Zhao

Michael Macher

Methods, devices, and systems for laser diode packaging platforms are provided. In one aspect, a laser diode assembly includes a heat sink and a plurality of laser diode units horizontally spaced apart from one another on the heat sink. Each laser diode unit includes: a first submount positioned on the heat sink and spaced apart from adjacent another first submount, a laser diode including an active layer between a first-type doped semiconductor layer and a second-type doped semiconductor layer, a bottom side of the laser diode being positioned on the first submount, and a second submount positioned on a top side of the laser diode and spaced apart from adjacent another second submount. The first submount, the laser diode, and the second submount in the laser diode unit are vertically positioned on the heat sink. The laser diodes of the plurality of laser diode units are electrically connected in series.

Laser diode packaging platforms

A laser diode bar: includes a semiconductor substrate comprising a first semiconductor layer of a first conductivity type; a first laser diode stack on an upper side of the semiconductor layer; a second laser diode stack on the upper side of the semiconductor layer, the second laser diode stack being electrically connected in series with the first laser diode stack, in which an electrical conductivity of the first semiconductor layer of the first conductivity type is higher than an electrical conductivity of each semiconductor layer of the first and second laser diode stacks; and a first electrode layer on the first laser diode stack, in which the first electrode layer electrically connects the first laser diode stack to a portion of the first semiconductor layer of the first conductivity type that is between the first laser diode stack and the second laser diode stack.

Low current, high power laser diode bar

A laser diode device includes: a first heat sink including a first mounting layer, in which the first mounting layer includes at least two mounting pads electrically isolated from one another; a second heat sink including a second mounting layer, in which the second mounting layer includes at least two mounting pads electrically isolated from one another; and a laser diode bar between the first heat sink and the second heat sink, in which a bottom electrical contact of the laser diode bar is mounted to the first mounting layer, and a top electrical contact of the laser diode bar is mounted to the second mounting layer.

Double sided cooling of laser diode

A device for wavelength coupling of laser beams () with different wavelengths (&#x3bb;, . . . &#x3bb;), comprising: at least one laser source for generating a plurality of laser beams (), and an overlapping device for spatial overlapping of the plurality of laser beams () for forming an overlapped laser beam with a plurality of wavelengths (&#x3bb;. . . &#x3bb;). The device has a feedback device arranged between the laser source and the overlapping device for feeding a radiation proportion of the laser beams () to be overlapped back to the laser source, the feedback device comprising a partially reflecting angle-dispersive optical element, in particular a partially reflecting diffraction grating. The overlapping device may, for example, be configured as a transmitting or reflecting diffraction grating whose optical properties are adapted to the optical properties of the partially reflecting diffraction grating to overlap the laser beams () in an essentially dispersion-free manner.

Device for wavelength combining of laser beams

A laser module has a unitary base including stepped platforms with an offset relative to an adjacent platform, each stepped platform accommodating a laser source with at least a first and a second plurality of stepped platforms, each platform accommodating a cooling channel inside at a predetermined depth below the top surface of the platform to conduct a flow of cooling fluid provided on an inlet, the cooling channel running under a platform having microchannels, the cooling channels being connected to a fluid inlet with an inlet manifold that provides cooling fluid at the inlet and an outlet manifold to dispose the cooling fluid with waste heat at an outlet, the laser module producing in one embodiment no less than 100 Watt of optical power.

Stepped diode laser module with cooling structure

A laser disk module includes a lasing element including an active gain medium, the lasing element including opposite top and bottom end surfaces, and a heat transfer element adjacent the bottom end surface, the heat transfer element including a ceramic material that defines a plurality of cooling structures. The heat transfer element is configured to transfer heat generated in the lasing element to a coolant in contact with the heat transfer element in the plurality of cooling structures during operation of the laser disk module.

Cooling disk lasers

A laser system includes a first source and a second source for generating a first laser beam and a second laser beam, respectively, and a mirror arrangement including a first interleaving laser mirror with a high reflecting area configured to reflect the first laser beam and a first high transmitting area configured to transmit the second laser beam.

Laser beam interleaving

A laser system includes at least two sources configured to provide at least two spatially separated laser beams, and a mount configured to mount the at least two sources along an arc, the arc defining an angular coordinate and a radial coordinate, wherein an axial coordinate is orthogonal to the angular coordinate and the radial coordinate, and the spatially separated laser beams are separated in the axial coordinate. The mount is further configured to mount the at least two sources providing thereby an offset of the laser beams in the axial coordinate such that the laser beams interleave in the axial direction at a center region of the arc.

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Cranbury, NJ, United States of America

Thilo Vethake