A self-tuning optical resonator
Abstract
We demonstrate a nonlinear optical resonator that tunes itself onto resonance with an input beam. In a monolithic Fabry-Perot cavity implemented in rubidium-doped periodically-poled potassium titanyl phosphate, an intensity-dependent refractive index produces line-pulling by multiple free-spectral ranges (FSRs). In this condition, the cavity passively maintains optical resonance in the face of FSR-scale excursions of the drive laser frequency: when one resonant operating-point becomes unstable, the resonator rapidly transitions to another resonant operating point. We demonstrate stable second-harmonic generation with no active feedback to laser or cavity. The self-tuning effect appears to be supported by a very strong, previously unreported optical nonlinearity.
Cite
@article{arxiv.1707.09085,
title = {A self-tuning optical resonator},
author = {Joanna A. Zielinska and Morgan W. Mitchell},
journal= {arXiv preprint arXiv:1707.09085},
year = {2018}
}