Critical coupling in Cavity Resonator Integrated Grating Filters (CRIGFs) for SHG control

EPJ Web of Conferences(2023)

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摘要
We demonstrate experimentally critical coupling for nonlinear conversion in grating-coupled Fabry-Pérot planar microcavities known as Cavity-Resonant Integrated Grating Filters (CRIGFs). Novel asymmetric designs offer Q-factors from 1000 to 7000 and allow critical coupling with maximised SHG. We developed an improved coupled-mode model for the linear and non-linear spectral response of CRIGFs which allows accurate insight on the intrinsic and coupling losses in these microcavities.
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关键词
shg control,critical coupling,filters,crigfs
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