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Wide Y-junctions with low losses in three-dimensional dielectric optical waveguides

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3 Author(s)
Hanaizumi, O. ; Tohoku Univ., Sendai, Japan ; Miyagi, M. ; Kawakami, Shojiro

This paper proposes a simple structure (antenna coupledY- junction) which reduces radiation losses ofY-junctions in 3-D optical waveguides by decreasing refractive indexes near the branching regions. A principle to reduce radiation losses and a design theory are presented for the newY-junction by using geometrical optics. It is theoretically shown that losses of the properly designed 3-DY-junctions can be reduced by around an order of magnitude compared to those of conventional ones when the branching angles are large.

Published in:

Quantum Electronics, IEEE Journal of  (Volume:21 ,  Issue: 2 )

Date of Publication:

February 1985

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