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Filter using vertical coupling between a single-mode waveguide and a multimode waveguide

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Abstract

We have demonstrated the feasibility of the process fabricating a single-mode waveguide and a multimode waveguide aligned vertically on the same substrate. Using this process, we have proposed and demonstrated a filter that drops optical signal propagating in a single-mode waveguide to a multimode waveguide in the specific wavelength interval by a long- period grating.

© 2002 Optical Society of America

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