Impact Statement:We proposed a magneto-optical isolator for fundamental TM mode on lithium niobate on insulator platform. Compared with the latest isolator on silicon waveguides, our isol...View more
Abstract:
We proposed a design of a fundamental TM mode waveguide optical isolator using lithium niobate on insulator (LNOI) and deposited magneto-optical film. The optical isolato...View moreMetadata
Impact Statement:
We proposed a magneto-optical isolator for fundamental TM mode on lithium niobate on insulator platform. Compared with the latest isolator on silicon waveguides, our isolator has lower butt coupling loss and can be easily designed benefitting from the similar refractive index of LN and Ce: YIG. It is a compact isolator design along with low loss and high isolation, so it will have a good application prospect in LN integrated photonic devices.
Abstract:
We proposed a design of a fundamental TM mode waveguide optical isolator using lithium niobate on insulator (LNOI) and deposited magneto-optical film. The optical isolator adopts an asymmetric Mach-Zehnder interferometer (MZI) structure composed of two 1 × 2 MMIs, non-reciprocal and reciprocal waveguides. We used three methods to calculate the non-reciprocal phase shift (NRPS) of the lithium niobate (LN)/ Ce: YIG composite waveguide and got similar results. The device shows about 51.98 nm 30 dB isolation bandwidth and 1.20 dB simulated insertion loss at the wavelength of 1550 nm. The fabrication tolerances and a suitable process are also discussed to meet the state-of-art technology and material properties.
Published in: IEEE Photonics Journal ( Volume: 13, Issue: 2, April 2021)