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Periodically poled lithium niobate linearly-uncoupled resonators for reconfigurable spontaneous parametric downconversion

Alessia Stefano, Luca Zatti, Marco Liscidini

Published Jan 1, 2025• 0 citations
Publisher

Abstract

We study SPDC in periodically poled structures with linearly uncoupled resonators linked by a Mach-Zehnder interferometer, achieving 2.60 GHz/mW at single resonance, with reconfigurability across a bandwidth of 300 nm.
DOI
10.1364/cleo_fs.2025.ff106_6

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Biphoton generation with spontaneous parametric down conversion (SPDC) process has applications in quantum imaging and sensing. Simulations have been done on periodically poled lithium niobate (PPLN) crystals with varying polled period. The poled period has been varied from 20.6μm\mu \mathbf{m}μmto 23.3μm\mu \mathbf{m}μm. The pump wavelengths have been selected in the range of 750 to 850 nm. The variations in temperature and the poled grating facilitate the generation of tunable entangled photon pairs from 1100 nm to 3200 nm.