High coupling efficiency grating couplers on lithium niobate on insulator

Abstract

We demonstrate monolithically defined grating couplers in $Z$-cut lithium niobate on insulator for efficient vertical coupling between an optical fiber and a single mode waveguide. The grating couplers exhibit $\sim 44.6\%$/coupler and $\sim 19.4\%$/coupler coupling efficiency for TE and TM polarized light respectively. Taperless grating couplers are investigated to realize a more compact design.

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Cited by in corpus (10)

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• Efficient light coupling between an ultra-low loss lithium niobate waveguide and an adiabatically tapered single mode optical fiber
• Design principles of apodized grating couplers
• Efficient self-imaging grating couplers on a Lithium-Niobate-On-Insulator platform at near-visible and telecom wavelengths
• Integrated Photonic Platforms for Quantum Technology: A Review
• Quantum logical controlled-NOT gate in a lithium niobate-on-insulator photonic quantum walk
• On-chip quantum interference between independent lithium niobate-on-insulator photon-pair sources
• A fixed phase tunable directional coupler based on coupling tuning