Abstract

We have proposed a silica–polymer hybrid variable optical attenuator that we made by creating two trenches along the core of a straight silica planar waveguide and filling the trenches with a polymer. The polymer, which had a superhigh thermo-optic coefficient, was specially designed and developed in this study to lower the power consumption of the device. We achieved a maximum attenuation of −29 dB for the device by changing the polymer’s temperature by only 7 °C. The device has a very low power consumption at 2–3 mW/channel, making it a good candidate for integration with arrayed waveguide gratings.

© 2005 Optical Society of America

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