Abstract

Since its first demonstration by Nuss et al.¹ in 1995, optoelectronic THz imaging has become a rapidly expanding field of research² with the potential for applications in package inspection and in the biomedical field. Typical optoelectronic THz measurement systems employ set-ups based on expensive femtosecond laser systems which have problems to obtain narrow-linewidth spectral data. For these reasons, there is an interest to find conceptual alternatives. We present a THz imaging system based on the coherent generation and detection of cw THz radiation by photomixing as demonstrated by Verghese et al.³ Our setup is given in Fig. 1

© 2002 Optical Society of America