Frequency stability enhancement from carrier-envelope resonance in a surface acoustic wave delay line oscillator

We have built a new injection‐locking set‐up which allows the study of low frequency noise in an oscillator. The interaction between a driving 100 MHz signal and a surface acoustic wave delay line oscillator undergoing a nonlinear modulational instability is investigated. Driving amplitude is used to control the synchronization range and therefore the frequency stability of a newly discovered carrier‐envelope resonance process. In the soliton‐locked regime, fundamental and subharmonic steps attached to a Lorentzian shape frequency‐amplitude characteristic are found. They are explained thanks to a driven nonlinear Schrodinger model and the joined synchronization map.