Darmstadt 2008 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

Q: Fachverband Quantenoptik und Photonik

Q 56: Quanteninformation (Photonen und nichtklassisches Licht I)

Q 56.8: Talk

Friday, March 14, 2008, 12:45–13:00, 1A

Photon pair generation in photonic crystal fibres — •Christoph Söller, Leyun Zang, Myeong Soo Kang, Philip Russell, and Christine Silberhorn — Max Planck Research Group IOIP, Günther-Scharowsky-Str. 1 / Bau 24, 91058 Erlangen

Spontaneous four-wave mixing in photonic crystal fibres (PCF) is a new promising approach to generate photon pairs for quantum information applications. Tailoring of the PCF microstructure allows the realisation of a wide variety of dispersion profiles and offers the prospect to control the spectral properties of the generated photons to a high degree. We are working on the implementation of a PCF source optimized for quantum networks. By manufacturing appropriate fibres, we aim to realise a source that provides heralded single photon states without narrow bandpass filtering. The heralding signal photon is emitted at a wavelength in the Si-APD range to ensure efficient detection. The idler photon of the pair is generated at 1.55µm and can thus be transmitted with very low losses by telecom fibres. Spectral decorrelation of the pair photons ensures the indistinguishability of idler photons from different sources and permits quantum interference without narrow bandpass filters.