  Optical parametric oscillators enable the conversion of pump light to new
frequency bands using nonlinear optical processes. Recent advances in
integrated nonlinear photonics have led to create compact, chip-scale sources
via Kerr nonlinearity-induced parametric oscillations. While these sources have
provided broadband wavelength tuning, the ability to tune the emission
wavelength via dynamically altering the dispersion, has not been attained so
far. Here we present a voltage-tunable, on-chip integrated optical parametric
oscillator based on alternating dispersiondimer, allowing to tune the emission
over nearly 20 THz near 1550 nm. Unlike previous approaches, our device
eliminates the need for a widely tunable pump laser source and provides
efficient pump filtering at the drop port of the auxiliary ring. Integration of
this scheme on a chip opens up the possibility of compact and low-cost
voltage-tunable parametric oscillators with diverse application possibilities.
