Article: Aegis Lightwave Awarded Patents for Tunable Thin-Film Filters.

WOBURN, Mass. -- Aegis Lightwave, a leader in optical channel monitors for fiber-optic communication networks, today announced that it has been granted a patent by the U.S. Patent and Trademark Office entitled "Tunable Optical Filter on a CTE-Matched Transparent Substrate" (US Patent No. 7,304,799). This follows another patent issued in China in October of 2007 entitled "Index Tunable Thin Film Interference Coatings" (China Patent No. ZL02812224.0). These patents cover some of the key aspects behind the device design and fabrication of dynamically tunable thin-film interference filters that include layers with a thermo-optically tunable refractive index.

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