posted on 2023-12-27, 16:10authored byDavid Alonso-Tomás, Néstor E. Capuj, Laura Mercadé, Amadeu Griol, Alejandro Martínez, Daniel Navarro-Urrios
The remote synchronization of oscillators is essential
for improving
the performance, efficiency, and reliability of various systems and
technologies, ranging from everyday telecommunications to cutting-edge
scientific research and emerging technologies. In this work, we unequivocally
demonstrate a unidirectional type of synchronization between two self-sustained
optomechanical crystal oscillators that interact solely through an
external optical feedback stage. Several pieces of experimental evidence
rule out the possibility of resonant forcing and, in contrast to previous
works, indicate that synchronization is achieved in the regime of
natural dynamics suppression. Our experimental results are in agreement
with the predictions of a numerical model describing the specific
mechanical lasing dynamics of each oscillator and the unidirectional
interaction between them. The outcomes of our study pave the way toward
the synchronization of clock signals corresponding to far-placed processing
elements in a future synchronous photonic integrated circuit.