We report on an integrated non-degenerate narrowband photon pair source produced at 890 nm and 1320nm via type II parametric down-conversion in a periodically poled waveguide with high-reflective dielectric mirrors deposited on the waveguide end faces. The conversion spectrum consists of three clusters and only 3 to 4 longitudinal modes with about 150 MHz bandwidth in each cluster. The high conversion efficiency in the waveguide, together with the spectral clustering in the double resonator, leads to a high brightness of 3×103pairs/(s⋅mW⋅MHz). The compact and rugged monolithic design makes the source a versatile device for various applications in quantum communication.
@article{arxiv.1306.1756,
title = {Two-color narrowband photon pair source with high brightness based on clustering in a monolithic waveguide resonator},
author = {Kai-Hong Luo and Harald Herrmann and Stephan Krapick and Raimund Ricken and Viktor Quiring and Hubertus Suche and Wolfgang Sohler and Christine Silberhorn},
journal= {arXiv preprint arXiv:1306.1756},
year = {2013}
}