| http://www.w3.org/ns/prov#value | - Preferably, such a reflector is a wideband DBR 2203 disposed on the optical waveguide 2231, between the directional coupler 2240 and the output facet 2217 of the IO waveguide chip 2215, and reflections originating from further downstream in the optical path are suppressed by appropriate techniques known in the art, such as by adapting the end of the optical fiber 2220 with a lens or chisel-tip sha
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