PT Journal
AU Tretyakov, IV
   Anfertyev, VA
   Revin, LS
   Kaurova, NS
   Voronov, BM
   Vaks, VL
   Goltsman, GN
TI Sensitivity and resolution of a heterodyne receiver based on the NbN HEB mixer with a quantum-cascade laser as a local oscillator
SO Radiophys. Quant. Electron.
JI Radiophys. Quant. Electron.
PY 2018
BP 988
EP 992
VL 60
IS 12
DI 10.1007/s11141-018-9863-x
DE NbN HEB mixer
AB We present the results of experimental studies of the basic characteristics and operation features of a terahertz heterodyne detector based on the superconducting NbN HEB mixer and a quantum cascade laser as a local oscillator operating at a frequency of 2.02 THz. The measured noise temperature of such a mixer amounted to 1500 K. The spectral resolution of the detector is determined by the width of the local-oscillator spectral line whose measured value does not exceed 1 MHz. The quantum-cascade laser could be linearly tuned with respect to frequency with the coefficient 7.2 MHz/mA within the limits of the current oscillation bandwidth.
ER