Configuring an optical point to multipoint communication network includes assigning a channel number Ci by modular arithmetic to each of a plurality of N access points, each of the plurality of N access points i) including a laser and ii) coupled to a hub having a shared optical receiver; and tuning the laser located in each of the plurality of N access points to a wavelength λui that is one of a set of M wavelengths as a function of the channel number assigned to the access point in which the laser is located, a channel spacing Δλ and an intrinsic wavelength λuin of the laser to prevent optical beat interference at the shared optical receiver.