Patent ID: 8231237

Claim:
A sub-assembly matable to a waveguide having a recess therein, the sub-assembly comprising: a substrate; a carrier having a substantially planar top surface raised above a top surface of the substrate, the carrier and the substrate being (i) different materials and (ii) discrete from each other; a bare-die light-emitting diode disposed on and in direct contact with the substantially planar top surface of the carrier such that, when the sub-assembly is joined to the waveguide, the discrete light source is within the waveguide an optically transparent encapsulation material entirely filling the recess to encapsulate the bare-die light-emitting diode and contacting at least one of the substrate or the carrier such that light from the bare-die light-emitting diode is efficiently coupled into the waveguide; and a gap laterally between the carrier and the substrate, wherein a reflective material is disposed in the gap for reflecting light from the bare-die light-emitting diode into the waveguide.