Generalised expression of the noise figure of phase sensitive amplifiers for an arbitrary number of modes
| Autor: | Fabienne Goldfarb, Yassine Hassouni, Debanuj Chatterjee, Fabien Bretenaker, Yousra Bouasria |
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| Přispěvatelé: | Equipe Sciences de la Matière et du Rayonnement (ESMaR), Faculté des Sciences, [Université Mohammed V], Université Mohammed V, Laboratoire Lumière, Matière et Interfaces (LuMIn), CentraleSupélec-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Ecole Normale Supérieure Paris-Saclay (ENS Paris Saclay) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Quantum Physics [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics] Amplifier Phase (waves) FOS: Physical sciences Noise figure Topology 01 natural sciences Signal Atomic and Molecular Physics and Optics Expression (mathematics) Electronic Optical and Magnetic Materials 010309 optics [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] 0103 physical sciences [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Quantum Physics (quant-ph) 010306 general physics Quantum Mixing (physics) Quantum fluctuation Physics - Optics Optics (physics.optics) |
| Zdroj: | Journal of Optics Journal of Optics, Institute of Physics (IOP), 2021, 23 (3), pp.035201. ⟨10.1088/2040-8986/abd3e8⟩ |
| ISSN: | 2040-8978 2040-8986 |
| Popis: | Phase sensitive amplifiers (PSA), contrary to usual phase insensitive amplifiers (PIA), are in principle capable to achieve noiseless amplification, i.e. exhibit a quantum-limited noise figure (NF) of 0 db. When implemented using four-wave mixing (FWM) in a non-linear fibre, extra waves can be generated by undesired FWM processes, which may introduce extra input ports for vacuum fluctuations, thus potentially degrading the NF. In this situation, we give here a general analytical quantum derivation of the PSA NF, valid for an arbitrary number of nonlinearly coupled modes. This expression is usable as soon as a linear input-output relation can be found for the annihilation and creation operators of the involved modes. It predicts that the noise level depends on the number of interacting waves. We illustrate the usefulness of this expression in the case of six waves, corresponding to four interacting quantum modes. In this example the signal NF is degraded by 0.4 db, compared to 10 db obtained for PIA operation of the same scheme. |
| Databáze: | OpenAIRE |
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