Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime
| Autor: | Florian Sedlmeir, Christoph Marquardt, Dmitry Strekalov, Gerhard Schunk, Alexander Otterpohl, Golnoush Shafiee, Harald G. L. Schwefel, Gerd Leuchs, Ulrich Vogl |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Quantum Physics Photon FOS: Physical sciences Physics::Optics General Physics and Astronomy Semiclassical physics Quantum channel 01 natural sciences 010305 fluids & plasmas Power (physics) Nonlinear system Quantum electrodynamics 0103 physical sciences Optical parametric oscillator ddc:530 Quantum Physics (quant-ph) 010306 general physics Quantum Optics (physics.optics) Physics - Optics Parametric statistics |
| Zdroj: | New Journal of Physics |
| ISSN: | 1367-2630 1054-660X 0954-8998 0150-536X 0026-1394 1063-7818 |
| DOI: | 10.1088/1367-2630/ab9a87 |
| Popis: | Photon pairs and heralded single photons, obtained from cavity-assisted parametric down conversion (PDC), play an important role in quantum communications and technology. This motivated a thorough study of the spectral and temporal properties of parametric light, both above the optical parametric oscillator (OPO) threshold, where the semiclassical approach is justified, and deeply below it, where the linear cavity approximation is applicable. The pursuit of a higher two-photon emission rate leads into an interesting intermediate regime, between above OPO threshold and very low pump power, where the OPO still operates considerably below the threshold but the nonlinear cavity phenomena cannot be neglected anymore. Here, we investigate this intermediate regime and show that the spectral and temporal properties of the photon pairs, as well as their emission rate, may significantly differ from the widely accepted linear model. The observed phenomena include frequency pulling and broadening in the temporal correlation for the down-converted optical fields. These factors need to be taken into account when devising practical applications of the high-rate cavity-assisted spontaneous PDC sources. |
| Databáze: | OpenAIRE |
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