Low Threshold Bistability In TiO2-SiO2 Interference Filters

F. Mitschke; G. Ankerhold; W. Lange

doi:10.1117/12.949983

8 March 1989 Low Threshold Bistability In TiO₂-SiO₂ Interference Filters

F. Mitschke, G. Ankerhold, W. Lange

Proceedings Volume 1017, Nonlinear Optical Materials; (1989) https://doi.org/10.1117/12.949983
Event: 1988 International Congress on Optical Science and Engineering, 1988, Hamburg, Germany

Abstract

We have studied optical bistability in Ti0₂/Si0₂ interference filters ("hard coatings"). These systems compare favourably with the more conventional ZnSe filters in important characteristics, particularly in durability, switching contrast and long term stability. Unfortunately, switching is very slow. Our analysis reveals a unique mechanism: water molecu)es in pores of the coating are reversibly desorbed from well below the outside surface as the spot temperature is driven up and down by the irradiated light.

Citation Download Citation

F. Mitschke, G. Ankerhold, and W. Lange "Low Threshold Bistability In TiO₂-SiO₂ Interference Filters", Proc. SPIE 1017, Nonlinear Optical Materials, (8 March 1989); https://doi.org/10.1117/12.949983

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