Free-space optics systems are finding their niches

摘要

Free-space optics (FSO) systems—which use light to provide a wireless point-to-point communications link, much in the manner of digital microwave connections— made a significant splash after the 9/11 tragedy in New York City when several large end users turned to the technology while local carriers rebuilt their networks. However, disaster recovery represents only one role these systems can play. Proponents have touted FSO for everything from enterprise and campus networks to carrier last mile and wireless backhaul links to classified military and gov- eminent use. Certainly, system vendors have attacked each of these markets. According to industry sources, FSO has made headway in all of these applications; however, certain markets offer more success stories than others.