An optical channel tap assembly comprises a first N by M waveguide array including a first set of optical channels to convey optical signals along a first set of conveyance paths. The optical channel tap assembly also comprises a second N by M waveguide array including a second set of optical channels to convey the optical signals along a second set of conveyance paths, the optical signals received from the first set of conveyance paths. Additionally, the optical channel tap assembly comprises a beam splitter, disposed between the first N by M waveguide array and the second N by M waveguide array, to divert a first portion of power from the optical signals away from the second N by M waveguide array while allowing a second portion of power from the optical signals to propagate into the second N by M waveguide array.