A parallel optical communications system that incorporates a method and apparatus for performing electromagnetic interference (EMI) containment

Methods and apparatuses are provided for performing electromagnetic interference (EMI) containment in a parallel optical communications system. The apparatus includes a curved surface formed in the system housing near the opening through which a stack of ribbon cables passes, and a spring device. The stack of ribbon cables is sandwiched in between the curved surface of the housing and the spring device. The spring device exerts a force on the stack of ribbon cables that presses the stack against the curved surface of the housing and forms a sharp bend in the stack just before the stack passes through the opening in the housing. Because EMI radiation is restricted to propagation along the sharply bent pathway of the stack of ribbon cables, most or all of the EMI radiation traveling along that pathway is either attenuated or reflected before it reaches the opening.