Conversion efficiency in Kerr-microresonator optical parametric oscillators: From three modes to many modes
Jordan Stone, Gregory Moille, Xiyuan Lu, Kartik Srinivasan
We study optical parametric oscillations in Kerr-nonlinear microresonators, revealing an intricate solution space -- parameterized by the pump-to-sideband conversion efficiency -- that arises from an interplay of nonlinear processes. Using a three-wave approximation, we derive an efficiency-maximizing relation between pump power and frequency mismatch. To move beyond a three-wave approximation, a necessity for geometries such as integrated microring resonators, we numerically simulate the Lugiato-Lefever Equation that accounts for the full spectrum of nonlinearly-coupled resonator modes. We observe and characterize two nonlinear phenomena linked to parametric oscillations in multi-mode resonators: Mode competition and cross phase modulation-induced modulation instability. Both processes may impact conversion efficiency. Finally, we show how to increase the conversion efficiency by tuning the microresonator loss rates. Our analysis provides guidance on how the resonator dispersion and balance of intrinsic and coupling losses should be engineered to realize high conversion efficiency at a targeted pump power.
, Moille, G.
, Lu, X.
and Srinivasan, K.
Conversion efficiency in Kerr-microresonator optical parametric oscillators: From three modes to many modes, Optica, [online], https://doi.org/10.1103/PhysRevApplied.17.024038, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933014
(Accessed September 25, 2023)