Vanishing optical isolation barrier in double ion-implanted lithium niobate waveguide
- Department of Physics, Alabama A&M University, Normal, Alabama 35762-1268 (United States)
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6048 (United States)
Isolation properties at different propagation directions have been studied for an optical barrier between two superposed planar waveguides produced by MeV He{sup +} implantation in LiNbO{sub 3}. The barrier exists while the modes of the double structure propagate along the optic axis. The spacing between the modes measured with a prism coupler features efficiently isolated waveguides. The barrier {open_quote}{open_quote}vanishes{close_quote}{close_quote} when the directional angle between an extraordinary wave and the optic axis exceeds 50{degree}. In this case the mode spacing shows strong coupling between the waveguides that makes the double structure similar to a single waveguide with double thickness. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 279976
- Journal Information:
- Applied Physics Letters, Vol. 68, Issue 17; Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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