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Huebers, Heinz-Wilhelm; Pavlov, S.; Semenov, A.; Köhler, R.; Mahler, L.; Tredicucci, A.; Beere, H.; Ritchie, D.; Linfield, E. |
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Title |
Terahertz quantum cascade laser as local oscillator in a heterodyne receiver |
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Journal Article |
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2005 |
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Optics Express |
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13 |
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15 |
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5890-5896 |
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Keywords |
QCL heterodyne, 6 mW at 2.5 THz, HEB mixer, terahertz |
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Abstract |
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. |
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627 |
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