This conference presentation, “Parametric phase-sensitive amplification in silicon nitride waveguides” was recorded for the Nonlinear Optics and its Applications 2022 conference at SPIE Photonics Europe 2022.
Many linear and nonlinear optics applications rely on micro-resonators (MRRs) with carefully designed dispersion and coupling rate coefficients. These parameters are however challenging to measure for MRRs based on high-confinement optical waveguides. In this paper, we report on the use of optical frequency domain reflectometry (OFDR) for the measurement of group velocity dispersion (GVD), coupling coefficients and round-trip loss, in high-Q (Qi ∼ 0.3 × 106) silicon-rich nitride MRRs. This technique allows for retrieving the GVD coefficients, intrinsic losses and coupling coefficients for each transverse mode in the resonator, thus providing very valuable feed-back information from experiments to the design flow step.
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