PT Journal
AU Huebers, H
   Pavlov, S
   Semenov, A
   Köhler, R
   Mahler, L
   Tredicucci, A
   Beere, H
   Ritchie, D
   Linfield, E
TI Terahertz quantum cascade laser as local oscillator in a heterodyne receiver
SO Optics Express
PY 2005
BP 5890
EP 5896
VL 13
IS 15
DE QCL heterodyne; 6 mW at 2.5 THz; HEB mixer; terahertz
AB Terahertz quantum cascade lasers have been investigated with respect to their performance as a local oscillator in a heterodyne receiver. The beam profile has been measured and transformed in to a close to Gaussian profile resulting in a good matching between the field patterns of the quantum cascade laser and the antenna of a superconducting hot electron bolometric mixer. Noise temperature measurements with the hot electron bolometer and a 2.5 THz quantum cascade laser yielded the same result as with a gas laser as local oscillator.
ER