“…InP-based demultiplexers cannot compete with silica-based devices with respect to fiber coupling loss, which makes them less suitable for realization of circuits with a low complexity. Their main advantage lies in their potential for monolithic integration of active components such as detectors [3], [4], [6], [74]- [76], [113], optical amplifiers and modulators [39]- [41], [108]- [112], [115], and switches [99], and their potential to integrate large numbers of components on a single chip.…”