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Disruptive innovation at high-technology is never easy. It takes odyssey-like journey for an idea to be fully implemented. In quantum technology, PPLN has been proven to be a great medium for quantum frequency conversion. It can be easily realized in different application fields, such as quantum communication, quantum computing, quantum memory, quantum imaging, quantum sensing, etc. Here are some successful stories for your reference.
Broadbanddiffraction of correlated photons from crystal superlattices, Zi S D Toa et al 2022Quantum Sci. Technol. 7 01LT01
Designing high-power, octave spanning entangled photon sources for quantum spectroscopy, J.Chem. Phys. 154, 244201 (2021); https://doi.org/10.1063/5.0053688
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#quantum communication
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#quantum sensing
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#photon entanglement
#SPDC photon pairs
#correlated photon pair
#single-photon frequency upconversion #quantumentanglement generation