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We report our recent work on integrated AlGaAs sources of bi-photon states operating at room temperature and telecom wavelength. The extreme versatility of the emitted state and the electrical injection make these devices very good candidates for future photon communications.
Integrated optic devices — such as optical fibers, waveguides or linear optical circuits — offer distinct advantages for quantum information applications. The experimental setups get miniaturized, the spatial properties of generated quantum states are defined by the guiding geometries and networks are intrinsically stable. We present a toolbox for integrated quantum devices.
Here we propose a new method of heralding pure single photons by the use of wave guided PDC with counter propagating photon-pairs: one travels with the pump beam while the other is back propagating towards the laser source. The wavelengths of these generated photon pairs, can be freely engineered by microstructured periodic poling of the chi-nonlinearity of the crystal and an appropriately chosen...
An experimental detection scheme is demonstrated for directly measuring the spectrum of a parametric down-conversion (PDC) source by the use of a highly dispersive fibre. A temporally narrow pulse envelope is spectrally stretched in time by chromatic group velocity dispersion. In order to maximise this effect the high group velocity dispersion of a commercially available dispersion compensating fibre...
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