Wolfgang Sohler

Christine Silberhorn2
Harald Herrmann2
2Christine Silberhorn
2Harald Herrmann
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We present an integrated source of polarization entangled photon pairs in the telecom regime, which is based on type II-phasematched parametric down-conversion (PDC) in a Ti-indiffused waveguide in periodically poled lithium niobate. The domain grating - consisting of an interlaced bi-periodic structure - is engineered to provide simultaneous phase-matching(More)
We demonstrate the first mid-infrared free-space optical link employing coherent detection and parametric wavelength conversion. Introduction Optical components for transmission near 1.55 μm are a mature technology. Tunable lasers, modulators and balanced receivers at this wavelength are widely available. Numerous experiments have demonstrated the(More)
Phase modulated sub-picosecond pulses are converted by a time-to-space processor to quasi-monochromatic spatial beams that are spatially demultiplexed and coherently detected in real-time. The time-to-space processor, based on sum-frequency generation (SFG), serves as a serial-to-parallel converter, reducing the temporal bandwidth of the ultrashort pulse to(More)
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