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Conferences > IPR > 1990 > MI > MI5

Direct fabrication of coupler waveguide with index and dimensional taper by flame hydrolysis deposition

H. Yanagawa, S. Nakamura, and I. Ohyama

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Abstract

Although a dimensional taper is proposed to obtain low-loss coupling between components with different mode profiles, it can achieve only a small taper ratio practically because a limited range of V values is permitted to suppress mode conversion loss under a single-mode condition. To obtain a large mode-profile-converting capability, therefore, a channel waveguide with both index and dimensional taper is required.1-3 In this paper the fabrication of such a taper is reported.

© 1990 Optical Society of America

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