From Event: SPIE Commercial + Scientific Sensing and Imaging, 2018
As optical quantum information processing protocols and experiments become increasingly more complex, integrated optics provide a small and robust alternative to traditional bulk optics. Specifically, waveguide technology allows for the creation of bright single-photon sources based on the fact that photon pairs can be created at any location along the waveguide. For our goals, we are working on the characterization of a highly nondegenerate Spontaneous Parametric Down-Conversion (SPDC) waveguide source on a periodically poled KTP (PPKTP) crystal. Our current waveguide source uses type-II phase-matching to create collinear signal and idler photons at 1550 nm and 810 nm, respectively, with the promise of generating simultaneous time-bin and polarization entanglement in future iterations. Our intended source application is for use in quantum key distribution and superdense teleportation protocols between a space platform and collection telescopes on Earth.
Kristina A. Meier, Fumihiro Kaneda, and Paul G. Kwiat, "Towards nondegenerate polarization entanglement from a waveguide down-conversion source," Proc. SPIE 10659, Advanced Photon Counting Techniques XII, 106590K (Presented at SPIE Commercial + Scientific Sensing and Imaging: April 19, 2018; Published: 14 May 2018); https://doi.org/10.1117/12.2306532.
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