As further illustrated in FIG. 1, a beacon beam 24 (dotted line) may be transmitted from the transmitting communication device 200 to establish the communication link 22 with the receiving communication device 200. Specifically, communication device 200a may be a transmitting communication device, and communication device 200b, 200c, or 200d may be a receiving communication device, and vice versa. In addition, communication device 200b may be a transmitting communication device, and communication device 200e a receiving communication device, and vice versa. Communication device 200e may also be a transmitting communication device, and communication device 200f a receiving communication device, and vice versa. The beacon beam 24 may illuminate a larger solid angle in space than the optical beam used in the communication link 22, allowing the second communication device 200 to better locate the beacon beam 24. The first communication device 200 may align the beacon beam 24 co-linearly with the optical communication beam (not shown) that has a narrower angle than the beacon beam 24 and carries the communication signal 20. As such, when the receiving communication device 200 receives the beacon beam 24, the receiving communication device 200 may close a communication loop establishing a line-of-sight with the transmitting communication device 200. As a result, the communication link 22 that allows for the transmission of the optical communication beam (not shown) is established.