An ultra-compact 25.78-Gbit/s × 4-ch active optical cable with a high heat-dissipation structure

A 25.78-Gbit/s × 4-ch active optical cable (AOC) with a ultra-compact form factor is proposed. The size of the proposed AOC is 5.2 cm
³
, which is 45-% smaller than standard form factor of a μQSFP. By utilizing a high heat-dissipation structure, the proposed AOC demonstrated 25.78-Gbit/s error-free optical transmission under all-channels (4-ch) operation at case temperature (T
_c
) of 70 °C.