Planar to Channel Waveguide Coupler.
DEPARTMENT OF THE NAVY WASHINGTON D C
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This patent application couples light from a planar optical waveguide into a channel waveguide or an optical fiber and vice versa. The arrangement of the elements of this device is such that it allows coupling over a wide aperture so that a light beam in a planar guide does not have to be tightly focused. Also, the arrangement of elements allow for large positional tolerances. The interaction is evanescent therefore optical radiation may be coupled between a planar guide and a channel guide, or between a planar structure and a fiber core. If the channel guide is multimode, the different modes may be excited by changing the angle of the beam in the planar film to phase match one mode at a time.
- Fiber Optics and Integrated Optics