Applications, methods and systems for a laser deliver addressable array
There is provided assemblies for combining a group of laser sources into a combined laser beam. There is further provided a blue diode laser array that combines the laser beams from an assembly of blue laser diodes. There are provided laser processing operations and applications using the combined blue laser beams from the laser diode arrays and modules.
1. An addressable array laser processing system, the addressable array laser processing system comprising: at least three laser systems, wherein each laser system comprises:
a. at least three laser diode assemblies;
b. each of the at least laser diode assemblies comprises at least ten laser diodes, wherein each of the at least ten laser diodes is capable of producing a blue laser beam, having a power of at least about 2 Watts and a beam parameter product of less than 8 mm-mrad, along a laser beam path, wherein each laser beam path is essentially parallel, whereby a space is defined between the laser beams traveling along the laser beam paths; and
c. a means for spatially combining and preserving brightness of the blue laser beams positioned on all of the at least thirty laser beam paths, the means for spatially combining and preserving brightness comprising a collimating optic for a first axis of a laser beam, a vertical prism array for a second axis of the laser beam, and a telescope; whereby the means for spatially combining and preserving fills in the space between the laser beams with laser energy, thereby providing a combined laser beam a power of at least about 250 Watts, and a beam parameter product of less than 40 mm-mrad;
each of the at least three laser systems configured to couple each of their combined laser beams into a single optical fiber; whereby each of the at least the three combined laser beams being capable of being transmitted along its coupled optical fiber; the at least three optical fibers in optical association with a laser head; and a control system; wherein the control system comprises a program having a predetermined sequence for delivering each of the combined laser beams at a predetermined position on a target material.
2. The addressable array of claim 1 , wherein the predetermined sequence for delivering comprises individually turning on and off the laser beams from the laser head, thereby imaging onto a bed of powder to melt and fuse the target material comprising a powder into a part.
3. The addressable array of claim 1 , wherein the fibers in the laser head are configured in an arrangement selected from the group consisting of linear, non-linear, circular, rhomboid, square, triangular, and hexagonal.
4. The addressable array of claim 1 , wherein the fibers in the laser head are configured in an arrangement selected from the group consisting of 2×5, 5×2, 4×5, at least 5× at least 5, 10×5, 5×10 and 3×4.
5. The addressable array of claim 1 , wherein the target material comprises a powder bed; and, comprising: an x-y motion system, capable of transporting the laser head across a powder bed, thereby melting and fusing the powder bed; and a powder delivery system positioned behind the laser source to provide a fresh powder layer behind the fused layer.
6. The addressable array of claim 5 , comprising: a z-motion system, capable of transporting the laser head to increment and decrement a height of the laser head above a surface of the powder bed.
7. The addressable array of claim 5 , comprising: a bi-directional powder placement device capable of placing powder directly behind the delivered laser beam as it travels in a positive x direction or a negative x direction.
8. The addressable array of claim 5 , comprising a powder feed system that is coaxial with a plurality of laser beam paths.
9. The addressable array of claim 5 , comprising a gravity feed powder system.
10. The addressable array of claim 5 , comprising a powder feed system, wherein the powder is entrained in an inert gas flow.
11. The addressable array of claim 5 , comprising a powder feed system that is transverse to N laser beams where N≥1 and the powder is placed by gravity ahead of the laser beams.
12. The addressable array of claim 5 , comprising a powder feed system that is transverse to N laser beams where N≥1 and the powder is entrained in an inert gas flow which intersects the laser beams.