Eur. Phys. J. Special Topics 223, 2035–2040 (2014)
https://doi.org/10.1140/epjst/e2014-02246-3

Regular Article

Photorefractive tuning of whispering gallery modes of a spherical resonator integrated inside a microstructured optical fibre

Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Vassilika Vouton, 70013 Heraklion, Greece

Received: 26 May 2014
Revised: 4 August 2014
Published online: 6 October 2014

Abstract

We demonstrate the photorefractive tuning of the whispering gallery modes of a single BaTiO₃ microsphere resonator integrated inside a grapefruit-shaped microstructured optical fibre, upon CW laser irradiation at 532 nm while using irradiation intensities up to 5.5 W/cm². Temporal evolution results of the WGM spectra are provided with respect to the illumination and relaxation conditions applied.