Self-pulsation and chaos in micro-coil resonators

Optical microcoil resonators are a new resonator design with several unique and attractive features. Practically they can be made by coiling a tapered fibre around a central rod so that light in each turn of the fibre can couple to the fibre directly above or below it. Importantly it is the coupling of light from one coil to the coil directly below that allows for the creation of effective high Q cavities resulting in resonate frequencies where light is trapped inside the coil indefinitely. In this paper, we demonstrated the time response of microcoil resonators and showed that under certain regimes the output can be stable, periodic or even chaotic dependent on the relative power and detuning.