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Phase-Sensitive Coherence and the Classical-Quantum Boundary in Ghost ImagingThe theory of partial coherence has a long and storied history in classical statistical optics. the vast majority of this work addresses fields that are statistically stationary in time, hence their complex envelopes only have phase-insensitive correlations. The quantum optics of squeezed-state generation, however, depends on nonlinear interactions producing baseband field operators with phase-insensitive and phase-sensitive correlations. Utilizing quantum light to enhance imaging has been a topic of considerable current interest, much of it involving biphotons, i.e., streams of entangled-photon pairs. Biphotons have been employed for quantum versions of optical coherence tomography, ghost imaging, holography, and lithography. However, their seemingly quantum features have been mimicked with classical-sate light, questioning wherein lies the classical-quantum boundary. We have shown, for the case of Gaussian-state light, that this boundary is intimately connected to the theory of phase-sensitive partial coherence. Here we present that theory, contrasting it with the familiar case of phase-insensitive partial coherence, and use it to elucidate the classical-quantum boundary of ghost imaging. We show, both theoretically and experimentally, that classical phase-sensitive light produces ghost imaging most closely mimicking those obtained in biphotons, and we derived the spatial resolution, image contrast, and signal-to-noise ratio of a standoff-sensing ghost imager, taking into account target-induced speckle.
Document ID
20150006780
Document Type
Conference Paper
External Source(s)
Authors
Erkmen, Baris I. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hardy, Nicholas D. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Venkatraman, Dheera (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Wong, Franco N. C. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Shapiro, Jeffrey H. (Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
April 27, 2015
Publication Date
August 21, 2011
Subject Category
Instrumentation and Photography
Physics of Elementary Particles and Fields
Meeting Information
SPIE Optics + Photonics 2011(San Diego, CA)
Distribution Limits
Public
Copyright
Other
Keywords
coherence theory
phase-sensitive coherence
quantum imaging
ghost imaging
optical imaging

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