Characterization of a quantum cascade laser as local oscillator in a heterodyne receiver at 2.5 THz

A quantum cascade laser operating at 2.5 THz has been investigated with respect to performance parameters which are relevant for 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...

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Bibliographic Details
Main Authors: Hubers, H.W., Pavlov, S.G., Semenov, A.D., Kohler, R., Mahler, L., Tredicucci, A., Beere, H.E., Ritchie, D.A., Linfield, E.H.
Format: Conference Proceeding
Language:English
Subjects:
Antenna measurements
Bolometers
Electron beams
Gas lasers
Laser beams
Local oscillators
Pattern matching
Quantum cascade lasers
Superconducting device noise
Temperature measurement
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Summary:A quantum cascade laser operating at 2.5 THz has been investigated with respect to performance parameters which are relevant for 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.
ISSN:2162-2027
DOI:10.1109/ICIMW.2005.1572417