Optical-electric converting module

An optical-electric converting module, comprising:

• a printed circuit board (PCB) comprising a supporting surface, at least one laser diode and at least one photo diode, the at least one laser diode and the at least one photo diode positioned on the supporting surface and electrically connected to the PCB;
• and
• an optical-electric coupling element comprising:
• a lower surface defining a first cavity, a bottom portion of the first cavity forming at least one first light-receiving coupling lens and at least one first light-emitting coupling lens, the optical-electric coupling element positioned on the supporting surface, with each of the at least one the first light-receiving coupling lens being aligned with a respective one of the at least one laser diode, and each of the at least one first light-emitting coupling lens being aligned with a respective one of the at least one photo diode, a distance between the at least one first light-receiving coupling lenses and the at least one laser diode being equal to a distance between the at least one first light-emitting coupling lens and the at least one photo diode in a direction perpendicular to the supporting surface.