Optoelectronic surface-mounted device and method for forming an optoelectronic surface-mounted device

An optoelectronic surface-mounted device, the optoelectronic surface-mounted device comprising:

• a premolded casing having a first cavity and a second cavity;
• a first electrooptical element and a second electrooptical element;
• a cap element attached to the premolded casing, the cap element having a first retainer and a second retainer formed therein, the first and second retainers each having at least one mating feature formed therein that is configured to interlock with at least one respective mating feature formed on first and second optical waveguide termination devices disposed on ends of first and second optical waveguides, respectively, wherein the first and second retainers are aligned with the first and second cavities, respectively, such that when the first and second optical waveguide termination devices are interlocked with the first and second retainers, respectively, the ends of the first and second optical waveguides secured to the first and second termination devices are positioned over the first and second cavities, respectively;
• and
• a leadframe to which the first electrooptical element and the second electrooptical element are mounted, wherein the leadframe is embedded in the premolded casing, and wherein the first cavity is adapted for providing a first electromagnetic radiation path between the first optical waveguide and the first electrooptical element, and wherein the second cavity is adapted for providing a second electromagnetic radiation path between the second optical waveguide and the second electrooptical element, and wherein at least a portion of the premolded casing disposed between the first and second cavities comprises a material that is opaque to a wavelength of electromagnetic radiation to be propagated alone the first and second electromagnetic radiation paths to decouple electromagnetic radiation propagating along the first electromagnetic radiation path from electromagnetic radiation propagating along the second electromagnetic radiation path.