Patent ID: 9323063
Filing Date: 2016-04-26
CPC Classification: G02B

Claim Text:
1. A diode laser beam combining apparatus for producing a high combined beam power density, comprising: an array of semiconductor laser emitters arranged in a collinear manner with respect to each other and having an emitter pitch; a cylindrical lens for collimating emitter beams generated by the array of laser emitters in a direction perpendicular to a junction plane of the laser emitters; a micro-optic array configured to perform rotational transformation of the collimated emitted beams, said micro-optic array having a lateral spacing in a direction parallel to the junction plane of the laser emitters matched to the emitter pitch; and means for collimating the emitter beams in the direction perpendicular to the junction plane of the laser emitters after passing through the micro-optic array, said collimating means including a multi-element long focal length cylindrical lens assembly having at least one negative power and at least one positive power lens component, wherein the cylindrical lens has a focal length f where θ FA is a far-field divergence angle in a fast axis direction, h S is a diode bar smile value, h M represents optics misalignments, λ is a wavelength of propagating radiation, and D eff represents an effective aperture size of the cylindrical lens.