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Conferences > IPR > 1996 > IME > IME6

Silica based Mach-Zehnder add-drop filter fabricated with UV-induced gratings

Glenn E. Kohnke, Charles H. Henry, Edward J. Laskowski, Russell J. Fischer, Thomas A. Strasser, and Alice E. White

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Abstract

Add-drop filters are critical components for wavelength-division-multiplexed optical communications systems. It is of interest to develop narrow bandwidth devices with good isolation and crosstalk performance and minimal insertion loss. A Mach-Zehnder interferometer with UV-induced gratings is an attractive add-drop technology.1 Adjacent channel isolation greater than 20 dB at 100 GHz and transmitted isolation less than -20 dB has been demonstrated in a fiber-based device.2 However, fiber interferometers suffer from sensitivity to environmental changes due to polarization effects and also require UV trimming to account for arm length differences.

© 1996 Optical Society of America

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