About: http://webisa.webdatacommons.org/61805989

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The problem is particularly acute in switching systems that propagate an optical signal over significant distances in free space before coupling the optical signal back into an optical fiber.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com