Heterodyne detection at near-infrared wavelengths with a superconducting NbN hot-electron bolometer mixer
| Autor: | Alexander I. Nadezhdinsky, Aleksandr Verevkin, Alexander Shurakov, M. Shcherbatenko, Pavel Larionov, Matvey Finkel, Yury Lobanov, Alexander Rodin, Yakov Ponurovsky, Artem Klimchuk, Boris M. Voronov, A. V. Semenov, Gregory Goltsman, T. M. Klapwijk, S. N. Maslennikov |
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| Rok vydání: | 2014 |
| Předmět: |
Optical fiber
Materials science medicine.diagnostic_test business.industry Quantum limit Bolometer Astrophysics::Instrumentation and Methods for Astrophysics Physics::Optics Noise figure Atomic and Molecular Physics and Optics law.invention Wavelength Optics Intermediate frequency law medicine Optoelectronics Heterodyne detection Optical tomography business |
| Zdroj: | Optics Letters. 39:1429 |
| ISSN: | 1539-4794 0146-9592 |
| DOI: | 10.1364/ol.39.001429 |
| Popis: | We report on the development of a highly sensitive optical receiver for heterodyne IR spectroscopy at the communication wavelength of 1.5 μm (200 THz) by use of a superconducting hot-electron bolometer. The results are important for the resolution of narrow spectral molecular lines in the near-IR range for the study of astronomical objects, as well as for quantum optical tomography and fiber-optic sensing. Receiver configuration as well as fiber-to-detector light coupling designs are discussed. Light absorption of the superconducting detectors was enhanced by nano-optical antennas, which were coupled to optical fibers. An intermediate frequency (IF) bandwidth of about 3 GHz was found in agreement with measurements at 300 GHz, and a noise figure of about 25 dB was obtained that was only 10 dB above the quantum limit. |
| Databáze: | OpenAIRE |
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