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Bragg-Grating Enhanced Narrow-Band Spontaneous Parametric Down Conversion

We propose a new method to narrow the linewidth of entangled photons generated from spontaneous parametric down conversion (SPDC). An internal Bragg grating is incorporated onto a nonlinear optical crystal waveguide. We study theoretically the spectral characteristics of SPDC under two Bragg grating structures. We show that using the Bragg grating with a midway pi-phase shifter, it is a promising way to generate narrow-line entangled photons.

preprint2009arXivOpen access
Li YanLijun MaXiao Tang
physics.optics
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Open access3 authors1 topic
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Li YanLijun MaXiao Tang

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