![]() In this amazing, electronic era we may explore the universe without any telescope or even consult with a medical doctor without leaving the house. Thanks to that we can send cross-continental messages within just a few seconds, navigate without physical on-paper maps, participate in distance learning, or do shopping via a smartphone, but that is not the end. Nowadays, we cannot imagine living in a world without the Internet, which is the most popular source for acquiring knowledge and a medium of information exchange. Within just a few centuries we got to the Information Age, in which globalization has become a reality. Since the times when the only way to send a message with important information was to send a runner with it, mankind has made spectacular progress with data transfer. People have always needed to communicate. Here, we briefly discuss Free-Space Optical Communication from mirrors and optical telegraphs to modern wireless systems and outline the future development directions of optical communication. Unfortunately, FSOC is susceptible to disruption due to atmospheric conditions or direct sunlight. The rapid development of the high-speed connection technology allows one to reduce the repair downtime and gives the ability to quickly establish a backup network in an emergency. The main advantages of FSOC are a high speed, cost savings, compact structures, low power, energy efficiency, a maximal transfer capacity, and applicability. ![]() Due to its large bandwidth, FSOC can be used in various applications and has therefore become an important part of our everyday life. As an alternative to wire communication systems, it allows efficient voice, video, and data transmission using a medium like air. Free-Space Optical Communication (FSOC) has diametrically changed the way people exchange information. Recently, increased data demand and crowded radio frequency spectrum have become crucial issues. Fast communication is of high importance.
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