Sech-squared Pockels solitons in the microresonator parametric down-conversion

We present an explicit sech-squared-soliton solution associated with the optical Pockels effect, achieved through generation of frequency combs via parametric down-conversion in microresonators quadratic nonlinearity. This soliton contrasts sech-soliton describing half-harmonic field limit large index mismatch, and cascaded-Kerr effect. predict differences spectral profiles powers solitons, report that pump power threshold former agree recent experimental observations.