Vertically displaced stack of multi-mode single emitter laser diodes
An optical source comprised of a stack of at least two laser diode subassemblies is provided. Each laser diode subassembly includes a submount and a multi-mode, single emitter laser diode. Each of the at least two laser diode subassemblies is mounted to a stepped mounting member such that the output beams from the at least two laser diode subassemblies are vertically displaced along the z-axis, horizontally displaced along the y-axis, and not horizontally displaced along the x-axis.
1 . An optical source comprising:
a stack comprised of at least two laser diode subassemblies, wherein each of said at least two laser diode subassemblies comprises:
a submount; and
a multi-mode, single emitter laser diode attached to a first surface of said submount, said multi-mode, single emitter laser diode having a lateral aperture and a vertical aperture, wherein a fast axis corresponding to an output beam from an output facet of said multi-mode, single emitter laser diode is approximately perpendicular to said first surface of said submount; and
a stepped mounting member comprised of a plurality of stepped mounting surfaces of increasing height, wherein each of said at least two laser diode subassemblies is mounted to one of said plurality of stepped mounting surfaces of said stepped mounting member to form said stack, wherein said output facet of each multi-mode, single emitter laser diode is horizontally displaced along the y-axis of the xy-plane relative to an adjacent output facet, wherein said output facet of each multi-mode, single emitter laser diode is not horizontally displaced along the x-axis of the xy-plane relative to said adjacent output facet, wherein said lateral apertures corresponding to each of said multi-mode, single emitter laser diodes are co-aligned along the x-axis of the xy-plane, and wherein each output beam from said at least two laser diode subassemblies is vertically displaced along the z-axis and perpendicular to the xy-plane relative to an adjacent output beam.
2 . The optical source of claim 1 , wherein said stepped mounting member comprises a cooling block.
3 . The optical source of claim 1 , wherein said at least two laser diode subassemblies are comprised of at least three laser diode subassemblies.
4 . The optical source of claim 1 , wherein said at least two laser diode subassemblies are comprised of at least four laser diode subassemblies.
5 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 20 microns to 50 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 5 laser diode subassemblies.
6 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 50 microns to 150 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 20 laser diode subassemblies.
7 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 100 microns to 250 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 30 laser diode subassemblies.
8 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 200 microns to 400 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 50 laser diode subassemblies.
9 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 300 microns to 600 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 80 laser diode subassemblies.
10 . The optical source of claim 1 , wherein each of said multi-mode, single emitter laser diodes has an emitter width in the range of 600 microns to 1200 microns, and wherein said at least two laser diode subassemblies are comprised of 2 to 150 laser diode subassemblies.