An optoelectronic component, arrangement and method are provided. The optoelectronic component comprises a premold casing having a mounting opening adapted for mounting an optical element, particularly a waveguide, an electromagnetic radiation source and/or detector adapted for generating and/or detecting electromagnetic radiation and being mounted in the premold casing, an electromagnetic radiation deflecting element mounted in the premold casing and adapted for deflecting electromagnetic radiation between the waveguide and the electromagnetic radiation source and/or detector, and a transparent medium filling at least a part of optical spaces within the premold casing.