8 × 8 wavelength cross connect with add/drop ports integrated in spatial and planar optical circuit

We demonstrate a compact 8 × 8 broadcast-and-select wavelength cross connect with add/drop ports for 8-degree node. A combination of waveguide-based frontend and free-space optics allows us to integrate eight arrays of 1 × 8 WSSs and 1 × 8 splitters into a small footprint.