Terahertz quantum cascade laser as local oscillator in a heterodyne receiver.
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.
Hübers
Heinz-Wilhelm
HW
Pavlov
S
S
Semenov
A
A
Köhler
R
R
Mahler
L
L
Tredicucci
A
A
Beere
H
H
Ritchie
D
D
Linfield
E
E