Media 1: Real-time monitoring of continuous-wave terahertz radiation using a fiber-based, terahertz-comb-referenced spectrum analyzer YasuiTakeshi NakamuraRyotaro KawamotoKohji IharaAtsushi FujimotoYoshihide YokoyamaShuko InabaHajime MinoshimaKaoru NagatsumaTadao ArakiTsutomu 2009 Originally published in Optics Express on 14 September 2009 (oe-17-19-17034)