| http://www.w3.org/ns/prov#value | - The output optical ports may be defined structurally or functionally, and the output optical signals may be transmitted from the slab waveguide by any suitable means, including but not limited to a channel waveguide, an optical fiber, a surface mounted prism, a surface coupling grating, free-space propagation through an edge of the slab waveguide, and so forth.
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