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30 August 2010 Narrow-band photon pairs generated from spontaneous parametric down conversion in a Bragg-grating enhanced waveguide
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Abstract
We propose a new method to narrow the linewidth of photon pairs generated from spontaneous parametric down conversion (SPDC). The single structure device incorporates an internal Bragg grating onto a nonlinear optical waveguide. We study theoretically the spectral characteristics of SPDC under two Bragg grating structures. We show that using the Bragg grating with a midway π- phase shifter is a promising way to implement narrow-line (~GHz to sub-GHz) entangled photon sources.
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Li Yan, Lijun Ma, and Xiao Tang "Narrow-band photon pairs generated from spontaneous parametric down conversion in a Bragg-grating enhanced waveguide", Proc. SPIE 7815, Quantum Communications and Quantum Imaging VIII, 781511 (30 August 2010); https://doi.org/10.1117/12.859269
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