dorsal/arxiv
View SchemaGhost imaging using homodyne detection
| Authors | M. Bache, E. Brambilla, A. Gatti, L. A. Lugiato |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0402160 |
| URL | https://arxiv.org/abs/quant-ph/0402160 |
| DOI | 10.1103/PhysRevA.70.023823 |
| Journal | Physical Review A 70, 023823 (2004) |
Abstract
We present a theoretical study of ghost imaging based on correlated beams arising from parametric down-conversion, and which uses balanced homodyne detection to measure both the signal and idler fields. We analytically show that the signal-idler correlations contain the full amplitude and phase information about an object located in the signal path, both in the near-field and the far-field case. To this end we discuss how to optimize the optical setups in the two imaging paths, including the crucial point regarding how to engineer the phase of the idler local oscillator as to observe the desired orthogonal quadrature components of the image. We point out an inherent link between the far-field bandwidth and the near-field resolution of the reproduced image, determined by the bandwidth of the source of the correlated beams. However, we show how to circumvent this limitation by using a spatial averaging technique which dramatically improves the imaging bandwidth of the far-field correlations as well as speeds up the convergence rate. The results are backed up by numerical simulations taking into account the finite size and duration of the pump pulse.
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"abstract": "We present a theoretical study of ghost imaging based on correlated beams\narising from parametric down-conversion, and which uses balanced homodyne\ndetection to measure both the signal and idler fields. We analytically show\nthat the signal-idler correlations contain the full amplitude and phase\ninformation about an object located in the signal path, both in the near-field\nand the far-field case. To this end we discuss how to optimize the optical\nsetups in the two imaging paths, including the crucial point regarding how to\nengineer the phase of the idler local oscillator as to observe the desired\northogonal quadrature components of the image. We point out an inherent link\nbetween the far-field bandwidth and the near-field resolution of the reproduced\nimage, determined by the bandwidth of the source of the correlated beams.\nHowever, we show how to circumvent this limitation by using a spatial averaging\ntechnique which dramatically improves the imaging bandwidth of the far-field\ncorrelations as well as speeds up the convergence rate. The results are backed\nup by numerical simulations taking into account the finite size and duration of\nthe pump pulse.",
"arxiv_id": "quant-ph/0402160",
"authors": [
"M. Bache",
"E. Brambilla",
"A. Gatti",
"L. A. Lugiato"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.023823",
"journal_ref": "Physical Review A 70, 023823 (2004)",
"title": "Ghost imaging using homodyne detection",
"url": "https://arxiv.org/abs/quant-ph/0402160"
},
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