Optical transceiver

An optical transceiver comprising:

• an optical connector;
• a photoelectric device;
• an optical fiber connecting the optical connector and the photoelectric device;
• a metal housing containing an interior space in which the optical connector, the photoelectric device, and the optical fiber are contained, and in which electromagnetic waves propagate;
• and
• an attenuation mechanism capable of attenuating the electromagnetic waves in an intermediate space, through which the optical fiber passes, of the interior space,
• the interior space being continuous in a first direction between the photoelectric device and the optical connector, the interior space being surrounded with a conductive surface from a plurality of directions perpendicular to the first direction, the plurality of directions including a second direction and a third direction that are perpendicular to each other,
• the attenuation mechanism being one of a post structure and a plate structure,
• the post structure including a plurality of conductive posts electrically continuous to the conductive surface, the conductive posts extending in the second direction, the conductive posts being arranged at a plurality of points in a plan view along the second direction, the points being at vertices of some quadrangles, adjacent quadrangles of which share one side with each other, the quadrangles being arranged in at least the first direction, the optical fiber passing through at least one adjacent pair of the quadrangles in the first direction,
• the plate structure including a plurality of conductive plates electrically continuous to the conductive surface, each of the conductive plates including front and back surfaces oriented in the third direction, the conductive plates being spaced apart and opposed to each other in the third direction, the conductive plates partitioning the intermediate space into a plurality of spaces arranged in the third direction, at least one of the spaces having a width in the third direction that provides impedance to propagation of electromagnetic waves, the optical fiber passing through the at least one of the spaces.