Stuttgart 2012 – scientific programme
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A: Fachverband Atomphysik
A 47: SYPC 3: From Atoms to Photonic Circuits 3
A 47.3: Talk
Friday, March 16, 2012, 11:00–11:15, V47.02
An All-Integrated PDC Source for Heralded Single Photons in Ti:LiNbO3 Waveguides — •Stephan Krapick, Benjamin Brecht, Viktor Quiring, Harald Herrmann, Wolfgang Sohler, and Christine Silberhorn — IQO, Uni Paderborn
Many applications in quantum information networking rely on heralded single photons. We present a waveguide-based source for the efficient generation of heralded single photons in Ti-diffused Lithium Niobate. Pumping with pulsed light at 532 nm, photon pairs at around 810nm and 1550nm are created in a type-I PDC process and split up into signal and idler beams using an integrated WDM coupler on the very same chip. We will optimize our source and aim to achieve heralded efficiencies of up to 93% in coincidence measurements, which are theoretically limited by the waveguide-fiber-coupling.