Forked Grating Coupler Optical Vortex Beam Interface for Silicon Photonics
Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE(2016)
Abstract
The Forked Grating Coupler (FGC) is a novel silicon photonics device that can interface with Optical Vortex (OV) light beams. The FGC combines the idea of an apodized Bragg grating coupler with a forked hologram, creating a device that can efficiently couple selected OV modes at near-normal incidence into confined dielectric waveguide modes of a photonic IC. FGCs retain many of the advantages of grating couplers, including convenient chip placement, simple fabrication, reasonable bandwidth, small size, and process compatibility.
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Key words
optical vortex,grating coupler,orbital angular momentum,silicon photonics,integrated optics
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