Self-stabilisation of a resonance of microresonator based on optical fibre with active core

We propose a new mechanism for fully optical tuning and self-stabilization of microresonators based on optical fibers. We suggest using a fiber with core doped with rare earth active ions. Launching light into the core would result in heating and tuning the microcavity. We also show that utilizing a single laser for both pumping the micro-resonator and heating up the fibre creates a feedback for self-stabilization of the microcavity.