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We present an integrated optical narrowband electrically tunable filter based on the whispering gallery modes of sapphire microspheres and double ion-exchanged channel BK7 glass waveguides. Tuning is provided by a liquid crystal infiltrated between the spheres and the glass substrate. By suitably choosing the radii of the spheres and of the circular apertures, upon which the spheres are positioned, arrays of different filters can be realized on the same substrate with a low cost industrial process. We evaluate the performance in …
SPIE, P. O. BOX 10 Bellingham WA 98227-0010 USA
Publication date: 
1 Jan 2010

Giovanni Gilardi, Hasan Yilmaz, Mohammed Sharif Murib, Rita Asquini, Antonio D'Alessandro, Ali Serpenguezel, Romeo Beccherelli

Biblio References: 
Volume: 7719 Pages: 7719-1E
Proceedings of SPIE- The International Society for Optical Engineering