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29 November 2012 The effect of pump focusing on the performance of ghost imaging with entangled resource
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Abstract
The effect of pump focusing on the performance of ghost imaging is studied experimentally on an entangled source. Theoretical results show that the correlation properties of the entangled photon source are destroyed when the conversion crystal is pumped by a focused laser beam. The experiment is performed on a compact entangled source produced by type-II non-collinear degenerate SPDC, and the results demonstrate that the “walk off” effects almost have no effect on the image, while the pump focusing greatly degrades the visibility of the image. However, a sharp image could be reproduced in the configuration first proposed in Ref. [8] for the case with pump focusing.
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Ming-Yang Zheng, Lian Chen, Xin-Dong Cai, Feng Li, and Ge Jin "The effect of pump focusing on the performance of ghost imaging with entangled resource", Proc. SPIE 8554, Quantum and Nonlinear Optics II, 85541E (29 November 2012); https://doi.org/10.1117/12.999788
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