Interconnect structure for coupling an electronic unit and an optical unit, and optoelectronic module

An optoelectronic module, comprising:

• a driver array configured to output and/or receive electrical signals;
• a laser array configured to convert the electrical signals into optical signals;
• an interconnect structure connecting the driver array and the laser array, the interconnect structure comprising an electrically conductive substrate and transmission leads connecting the driver array and the laser array and having signal leads and ground leads having lower impedance than the signal leads;
• and
• a ground plane layer underlying the ground leads, wherein the ground leads are electrically coupled to the ground plane layer;
• wherein the ground leads have a width that is larger than a width of the signal leads.

An optoelectronic module, comprising:

• a driver array configured to output and/or receive electrical signals;
• a laser array configured to convert the electrical signals into optical signals;
• an interconnect structure connecting the driver array and the laser array, the interconnect structure comprising an electrically conductive substrate and transmission leads connecting the driver array and the laser array and having signal leads and ground leads having lower impedance than the signal leads;
• and
• a ground plane layer underlying the ground leads, wherein the ground leads are electrically coupled to the ground plane layer;
• wherein the ground leads are electrically coupled to the ground plane layer by vias and the signal leads are narrower than the ground leads such that return signals are guided by the ground leads.