Led chip-to-chip vertically launched optical communications with optical fiber

An optically interconnected system, comprising:

• a multicore fiber;
• a first semiconductor package with a first aperture to receive a first end of the multicore fiber;
• first semiconductor logic circuitry mounted on a first substrate in the first semiconductor package, the first substrate having a first substrate aperture aligned with the first aperture of the first semiconductor package so as to form an aperture through the first substrate and the first semiconductor package;
• first transceiver circuitry, in the first semiconductor package, electrically coupled to the first semiconductor logic circuitry;
• a plurality of first microLEDs, in the first semiconductor package, electrically coupled to be driven by the first transceiver circuitry, the plurality of first microLEDs positioned to emit light into the first end of a multicore fiber;
• and
• a plurality of first photodetectors, in the first semiconductor package, electrically coupled to provide signals to the first transceiver circuitry, the plurality of first photodetectors positioned to receive light from the first end of the multicore fiber.