Title :
Coherent millimetre wave to mid-infrared measurements with continuous bandwidth reaching 40 THz
Author :
Karpowicz, N.E. ; Chen, J. ; Tongue, T. ; Zhang, X.-C.
Author_Institution :
Rensselaer Polytech. Inst., Troy
Abstract :
A terahertz time-domain system with continuous bandwidth extending from millimetre wave through the mid-infrared is demonstrated using ionising air as the generation and detection medium. The measurements indicate that the bandwidth of such systems is constrained only by the optical pulse duration utilised. With use of a 25 fs pulse duration laser, a continuous bandwidth reaching 40 THz is demonstrated.
Keywords :
measurement by laser beam; millimetre wave measurement; time-domain analysis; bandwidth 40 THz; coherent millimetre wave; continuous bandwidth; ionising air; mid-infrared measurements; time-domain system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20080356
