Author(s): Li, MX (Li, Mingxuan); Zhao, YR (Zhao, Yiru); Dai, SX (Dai, Shuangxing); Yu, WQ (Yu, Wenqi); Li, JY (Li, Jinye); Zhang, ZK (Zhang, Zhike); Liu, JG (Liu, Jianguo)

Source: IEEE PHOTONICS JOURNAL Volume: 13 Issue: 2 DOI: 10.1109/JPHOT.2021.3058686 Published: APR 2021

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 x 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.

Accession Number: WOS:000629724200002

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

zhang, zhi ke                  0000-0002-8726-3174

Li, Mingxuan                  0000-0002-4610-7554

ISSN: 1943-0655

eISSN: 1943-0647

Full Text: https://ieeexplore.ieee.org/document/9353214