RGB Combiner for Ultracompact Laser Beam Scanning Image Projectors

Abstract

We demonstrate an ultracompact red-green-blue (RGB) combiner based on multimode waveguides in a silicon nitride integrated photonics platform, achieving a low insertion loss of ~1-2 dB and low footprint (86×2.3 μm2). The proposed combiner enables the development of compact imaging projectors for augmented reality display technologies.