Grating-Enhanced Narrow-Band Spontaneous Parametric Down Conversion | NIST

Yan Li, Lijun Ma, Xiao Hong Tang

Schölz, Koch, Benson

David A. Long, Adam J. Fleisher, Szymon Wójtewicz +1 more

Yan Li, Lijun Ma, Xiao Hong Tang

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.

M. V. da Cunha Pereira, F. E. Becerra, Boris L. Glebov +3 more

D O Akat’ev, Латыпов Ильнур Зиннурович, A. V. Shkalikov +1 more

We present experimental results on the generation of narrow-band single-photon states via cavity-enhanced spontaneous parametric down-conversion in a PPLN crystal and demonstrate the feasibility of conditional preparation of single 867-nm photons with a 70-MHz linewidth, compatible with optical quantum memory devices based on Nd 3+ -doped isototopically pure Y 7 LiF 4 crystals.