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

Author

Hübers, H.W. ; Pavlov, S.G. ; Semenov, A.D. ; Köhler, R. ; Mahler, L. ; Tredicucci, A. ; Beere, H.E. ; Ritchie, D.A. ; Linfield, E.H.

Author_Institution

German Aerosp. Center, Berlin, Germany

Volume

1

fYear

2005

fDate

19-23 Sept. 2005

Firstpage

82

Abstract

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.

Keywords

bolometers; heterodyne detection; laser beams; quantum cascade lasers; submillimetre wave oscillators; submillimetre wave receivers; 2.5 THz; Gaussian profile; beam profile; field patterns; gas laser; heterodyne receiver; local oscillator; noise temperature measurements; quantum cascade laser; superconducting hot electron bolometric mixer antenna; Antenna measurements; Bolometers; Electron beams; Gas lasers; Laser beams; Local oscillators; Pattern matching; Quantum cascade lasers; Superconducting device noise; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, 2005. IRMMW-THz 2005. The Joint 30th International Conference on

Print_ISBN

0-7803-9348-1

Type

conf

DOI

10.1109/ICIMW.2005.1572417

Filename

1572417