Optical data center network, optical assembly and wavelength distribution method

The invention provides an optical data center network which has a generalized k-ary-n-cube topological structure. The optical data center network has n dimensions; each dimension is provided with ki top-of-rack (ToR) switches, wherein i is in the range [0, n-1], k is an integer greater than or equal to 3, and n is an integer which is greater than or equal to 2; a plurality of servers are connected with respective ToR switches respectively; each ToR switch is interconnected with other ToR switches through an optical assembly respectively. The invention further provides an optical assembly and a wavelength distribution method both applied in the optical data center network.