From Longman Dictionary of Contemporary Englishfibre opticsˌfibre ˈoptics British English, fiber optics American English noun [uncountable] TCthe process of using very thin threads of glass or plastic to carry information in the form of light, especially on telephone lines fibre optic cablesGRAMMAR: Singular or plural verb?Fibre optics is followed by a singular verb: Fiber optics is used extensively in modern technology.
Examples from the Corpus
fibre optics• Measuring current with light Another area of activity for King's is in fibre optics.• DONs can be a fast way of establishing links between major conurbations, often by means of fibre optics.• The DoI runs a mass of schemes to support research in particular areas, ranging from robots to fibre optics.From Longman Business Dictionaryfibre opticsfi‧bre op‧tics /ˌfaɪbər ˈɒptɪks-ˈɑːp-/ British English, fiber optics American English noun [uncountable]TELECOMMUNICATIONS the process of using very thin threads of glass or plastic to carry information in the form of light, especially on telephone lines —fibre optic adjective [only before a noun]high speed fibre optic cables 