US Patent 7546013 - Nanoparticle photon emitter for fiber optics

http://www.freepatentsonline.com/7546013.html

This patent from HP teaches a single photon generator input to a fiber waveguide of a quantum computer. Claim 1 reads:

1. A device comprising:

an individually addressed nanoparticle for emitting single photons;

a photonic crystal fiber waveguide for receiving the single photons, the waveguide optically coupled to the nanoparticle at an endface of the waveguide not treated to increase reflection, the waveguide endface disposed adjacent to the nanoparticle; and

a single backreflector optically coupled to the waveguide and configured to reflect at least some of the single photons toward the waveguide, the backreflector disposed adjacent to the nanoparticle and the waveguide endface;

wherein the nanoparticle is placed on one of the backreflector and the waveguide.