Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Quantum Information: Photons and Nonclassical Light III

Q 66.4: Talk

Friday, March 12, 2010, 14:45–15:00, E 214

Engineered photon-pair generation in standard birefringent optical fibers — •Christoph Söller¹, Offir Cohen², Brian J. Smith^2,3, Ian A. Walmsley², and Christine Silberhorn¹ — ¹IQO Group, MPI for the Science of Light, Günther-Scharowsky-Str. 1, 91058 Erlangen, Germany — ²University of Oxford, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK — ³Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, 117543 Singapore, Singapore

Photon-pair sources are a vital building block for many applications in quantum optics, e.g. quantum-communication and computation schemes. We present a photon-pair source based on spontaneous four-wave mixing in standard birefringent optical fibers. Pumping the fiber source with a pulsed Ti:sapphire laser allows generation of highly non-degenerate pair photons that can be efficiently detected with standard silicon-based single-photon detectors. By changing the bandwidth of the pump pulses we are able to control the amount of spectral entanglement and thus of spectral correlations present between the photons of a pair. This feature offers the possibility of creating completely factorable two-photon states, an important resource for linear optical quantum computing.