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Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR)

High extinction on-chip long pass filters in LNOI towards quantum optical applications

Andreas Boes, Thach Giang Nguyen, Lin Chang, John Edward Bowers, Arnan Mitchell

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We present a design for compact and efficient spectral filters with an extinction ratio of ~190 dB/cm in lithium niobate on insulator, which are essential for the on-chip integration of quantum-correlated photon pair sources.
DOI
10.1364/cleopr.2020.c3c_4

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Lithium niobate-on-insulator (LNOI) is a leading platform for high-speed optical communication technologies owing to its large electro-optic bandwidth, which enables light modulation above 100 GHz [1]. The wide transparency window is being leveraged to produce photonic integrated circuits operating at different wavelengths, and the strong second-order nonlinearity allows efficient frequency conversion via periodic poling of the crystal on the same waveguide network [2]. LNOI has potential to revolutionise optical communication, and nonlinear conversion processes can be used to generate highly pure quantum states acting as bits of information for the next generation of optical quantum information technologies.