Narrow-Band Photon Pairs Generated from Spontaneous Parametric Down Conversion in a Bragg-Grating Enhanced Waveguide | NIST

Xiao Hong Tang, Lijun Ma

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

Li Yan, Lijun Ma, Xiao Tang

We propose a new method to narrow the line width of entangled photons generated from spontaneous parametric downconversion (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 pi-phase shifter, it is a promising way to generate narrow-line (~GHz to sub-GHz) entangled photons.

Payam Abolghasem, Xiaojuan Shi, Martin Hendrych +2 more

Spontaneous–parametric down–conversion bandwidth control between 7 nm to 676 nm is reported in an integrated source of frequency anti–correlated photon–pairs using type–I and type–II phase–matched AlxGa1−xAs Bragg reflection waveguide.

Jingyun Fan, Alan L. Migdall, L Wang