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Nonlinear effects due to thermo-optical instability in microsphere resonators

: Schmidt, C.; Egorov, O.; Chipouline, A.; Pertsch, T.; Lederer, F.; Tünnermann, A.; Deych, L.


Institute of Electrical and Electronics Engineers -IEEE-:
ICTON '07, 9th International Conference on Transparent Optical Networks. Vol.3 : 1-5 July 2007 Rome, Italy
New York, NY: IEEE, 2007
ISBN: 1-4244-1249-8
International Conference on Transparent Optical Networks (ICTON) <9, 2007, Rome>
Conference Paper
Fraunhofer IOF ()

Microresonators of different geometries appeared to be promising part for future generations of integrated optical circuits. Due to extremely low losses (high resonator Q-factors and ultra small resonance bandwidths, respectively) the microresonators possess high level of energy concentration and, in turn, unprecedented low level of threshold for various nonlinear effects. In this work, detailed investigation of thermo-optical effects in microspheres made on optical fiber end is presented. Quasi "broadening" of the resonance coupling peaks and their shifting have been observed in the tests of light coupling into the high-Q microspherical resonators through the optical tapered fiber. The both effects have been explained by therno-optical nonlinearity causing resonance bistability.