Patent ID: 8111452
Filing Date: 2012-02-07
Classification: G02B,G02F,H01S

Abstract:
1. An optical package comprising a laser diode and a wavelength conversion device, wherein: the laser diode and the wavelength conversion device define an external laser cavity extending along an optical path between a wavelength selective component of the laser diode and an output reflector of the optical package; the wavelength conversion device comprises an input face, an output face, and a waveguide extending from the input face to the output face within the external laser cavity; the waveguide of the wavelength conversion device defines an input facial waveguide region on the input face of the wavelength conversion device; the laser diode is positioned such that an output face of the laser diode is proximity-coupled to the waveguide of the wavelength conversion device; the wavelength conversion device is tilted relative to the output face of the laser diode to define a tilt angle φ that is less than approximately 85°; the input face of the wavelength conversion device comprises a pair of tapered facets and a microlens; the pair of tapered facets and the microlens are defined on the input face such that they share respective portions of the facial waveguide region on the input face, with the tapered facets occupying peripheral portions of the facial waveguide region on the input face and the microlens occupying an interior portion of the facial waveguide region on the input face; each of the pair of tapered facets define a facet angle α within the facial waveguide region that is less than the facet angle α relative to the waveguide of the wavelength conversion device and is greater than approximately 45°.