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Integrated mode multiplexers are key components in photonic networks and are crucial to achieving higher data density. Asymmetric directional couplers represent one of the most common multiplexing architectures, owing to their low losses and scalability, but further bandwidth enhancements are sought after. In this Letter, we demonstrate a multiplexer/demultiplexer link based on asymmetric directional couplers assisted by subwavelength grating metamaterials.
3.2. The Coupling Ratio’s Dependence on the Optical Pump’s Power A set of intensity profiles of the output signal under varying input pumping powers is displayed in . The input signal’s power and the alignment of the feeding fiber with the left-hand core were kept constant across all measurements. A filter was placed before the IR camera so that the output pump’s power was blocked.
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