Fabrication and THz loss measurements of porous subwavelength fibers using a directional coupler method Dupuis, Alexandre ; Allard, Jean-François ; Morris, Denis ; Stoeffler, Karen ; Dubois, Charles ; Skorobogatiy, Maksim Abstract Publication: Optics Express Pub Date: May 2009 DOI: 10.1364/OE.17.008012 Bibcode: 2009OExpr..17.8012D