Journals >Chinese Optics Letters
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The ultra-high Q lithium-niobate-on-insulator (LNOI) microring resonator prepared by femtosecond laser lithography assisted chemical mechanical polishing, possesses a Q factor as high as 1.08×108, which corresponds to the propagation loss of waveguide of only ∼ 0.34 dB /m. These low-loss LNOI photonic devices show great potentials for highly efficient nonlinear optical conversion, high-speed information processing, and large-scale photonic integration on LNOI wafer.