Abstract
Low-loss optical waveguide bends are desired to realize integrated-optical devices with practical dimensions. On the basis of InGaAsP/InP, bend radii down to 150 μm are possible.1 However, an important material for integrated optics is LiNbO3 because of its large electro-optical coefficient and easy fabrication process. However, because of the weak confinement by Ti:LiNbO3 waveguides, large bend radii in the range of centimeters must be used.
© 1990 Optical Society of America
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