Real-time terahertz imaging using a 1.63-THz optically pumped terahertz laser and a pyroelectric camera

Real-time terahertz imaging is demonstrated using a 1.63 THz (184.31μm) optically-pumped terahertz laser (Coherent Sifir-50 FPL) and a 124×124 element room-temperature pyroelectric camera (Pyrocam III). Transmission-mode THz images are presented with samples hidden in various wrapping materials. Experimental results show that this THz imaging system has the potential for the application in real-time mail inspection and non-destructive inspection.