Optical waveguide element having a single crystalline substrate with a crystal axis angled with respect to a surface of the substrate
AssigneeNGK Insulators, Ltd.
InventorsAtsuo Kondo, Jungo Kondo, Yoshinari Kozuka, Soichiro Matsuzawa
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Abstract
An optical waveguide element includes a substrate made of a lithium tantalate single crystal or a lithium niobate-lithium tantalate solid solution single crystal and a bulky optical waveguide made of a lithium niobate single crystal is directly joined to the substrate. The c-axis of the single crystal substrate is tilted at an angle with respect to the surface of the substrate to which the bulky optical waveguide is joined. The tilted angle is preferably within a range of 17-37 degrees.
Claims10
An optical waveguide element comprising a substrate made of a lithium tantalate single crystal or a lithium niobate-lithium tantalate solid solution single crystal and a bulky optical waveguide made of a lithium niobate single crystal directly joined to the substrate, wherein the c-axis of the single crystal comprising the substrate is tilted at an angle with respect to the surface of the substrate to which the bulky optical waveguide is joined.
Dependencies are inferred from the claim text.