| http://www.w3.org/ns/prov#value | - At the outset, it should be understood that to the extend lasers or photodetectors are discussed as the devices, the terms ???top??? and ???bottom??? follow a convention whereby the ???bottom??? is the portion closest to the substrate, irrespective of whether the laser emits towards or away from the substrate 112 (or in the case of a photodetector the direction from which it receives light).
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