We have assembled a single-frequency imaging system at 3.4 THz with a quantum-cascade laser. Images of electronic and biological applications are demonstrated. We operate the laser with a peak output power of 2.5 mW at a 7% duty cycle and a 22 K operating temperature. The minimum spot size is 340 μm. The signal is detected with a single-element deuterated triglycine sulfate detector, and images are captured by scanning of the sample.
© 2005 Optical Society of America
Original Manuscript: June 25, 2004
Revised Manuscript: October 9, 2004
Manuscript Accepted: October 9, 2004
Published: January 1, 2005
Danielle R. Chamberlin, Peter R. Robrish, William R. Trutna, Giacomo Scalari, Marcella Giovannini, Lassaad Ajili, and Jerome Faist, "Imaging at 3.4 THz with a quantum-cascade laser," Appl. Opt. 44, 121-125 (2005)