Sensitivity and Resolution of a Heterodyne Receiver Based on the NbN HEB Mixer with a Quantum-Cascade Laser as a Local Oscillator
| Autor: | V. A. Anfertyev, I. V. Tretyakov, L. S. Revin, Vladimir L. Vaks, Boris M. Voronov, N. S. Kaurova, Gregory Goltsman |
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| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Physics::Instrumentation and Detectors Terahertz radiation Local oscillator Superheterodyne receiver Physics::Optics 02 engineering and technology 01 natural sciences law.invention Optics law 0103 physical sciences Electrical and Electronic Engineering 010302 applied physics Quantum optics Physics Noise temperature business.industry Detector Astronomy and Astrophysics Statistical and Nonlinear Physics 021001 nanoscience & nanotechnology Laser Electronic Optical and Magnetic Materials 0210 nano-technology Quantum cascade laser business |
| Zdroj: | Radiophysics and Quantum Electronics. 60:988-992 |
| ISSN: | 1573-9120 0033-8443 |
| DOI: | 10.1007/s11141-018-9863-x |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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