Optical module having shield structure in feedthrough

An optical module comprising:

• a housing that encloses a semiconductor optical device therein, the housing having electrically conductive walls including a rear wall and a pair of side walls each extending from the rear wall;
• and
• a feedthrough provided in the rear wall of the housing, the feedthrough including;
• an internal portion having an upper rear face and a lower rear face, and
• an external portion each made of electrically insulating materials protruding from the upper rear face and the lower rear face of the internal portion outwardly and having a top face, a back face, a rear face, and a pair of side faces, the top face being continuous to the upper rear face of the internal portion, the back face being continuous to the lower rear face of the internal portion, the rear face and the side faces connecting the top face with the back face, the top face including transmission lines comprising signal lines and ground lines, the transmission lines carrying high frequency signals for the semiconductor optical device, the back face of the external portion including ground lines,
• wherein at least one of the upper rear face, the lower rear face each provided in the internal portion, and the rear face of the external portion has a shield structure.