For traditional microprism-type bent waveguides one must take into consideration only the two outer optical paths to compensate for the phase difference between phase fronts in front of and behind the bent region. We propose a systematic design rule to achieve an optimal phase matching condition by taking account of the whole optical paths for full phase compensation. The simulated results obtained with the fast Fourier transform beam propagation method indicate that the normalized transmitted powers are greater than 95% even though the bent angle is as large as 10°.

© 1998 Optical Society of America

[Optical Society of America ]

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