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Narrow-band photon pairs generated from spontaneous parametric down conversion in a Bragg-grating enhanced waveguide
2010
Quantum Communications and Quantum Imaging VIII
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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 πphase shifter is a promising way to implement narrow-line (~GHz to sub-GHz) entangled photon sources.
doi:10.1117/12.859269
fatcat:tiecrpoggffi5ddm4qokmb6aly