Free space multiple laser diode module with fast axis collimator

An optical engine, comprising:

• a base substrate;
• a plurality of laser diodes bonded to the base substrate;
• at least one laser diode driver circuit, the at least one laser diode driver circuit operatively coupled to the plurality of laser diodes to selectively drive current to the plurality of laser diodes;
• a cap comprising at least one wall and at least one optical window that together define an interior volume sized and dimensioned to receive at least the plurality of laser diodes, the cap being bonded to the base substrate to provide a hermetic or partially hermetic seal between the interior volume of the cap and a volume exterior to the cap, and the optical window positioned and oriented to allow light emitted from the plurality of laser diodes to exit the interior volume;
• and
• an optical director element bonded to the base substrate proximate the plurality of laser diodes within the interior volume, the optical director element comprising a curved reflective surface positioned and oriented to reflect laser light from the plurality of laser diodes toward the optical window of the cap, and to collimate the laser light along the respective fast axes of the laser light from the plurality of laser diodes, wherein the shape of the curved reflective surface of the optical director element is defined by a parabolic cylinder, the parabolic cylinder includes a focal line, and the plurality of diodes are positioned along an axis that is collinear with the focal line of the parabolic cylinder.