Liu, Siwei; Niu, Jiaqi; Huo, Yujie; Cheng, Chuang; Fu, Xin; Yang, Lin Source: Optics Letters, v 49, n 12, p 3352-3355, June 15, 2024; ISSN: 01469592, E-ISSN: 15394794; DOI: 10.1364/OL.523346; Publisher: Optica Publishing Group (formerly OSA)

Author affiliation:

Key Laboratory of Optoelectronic Materials and Devices, Institute of Semiconductors, Chinese Academy of Sciences, Beijing; 100083, China

Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing; 100049, China

Abstract:

Compact routing of multimode bus waveguides is of great significance for on-chip mode-division multiplexing (MDM) systems to realize high integration density and flexible layout. In this Letter, we propose and experimentally demonstrate a novel, to the best of our knowledge, multimode photonic jumper (MPJ) on a standard silicon-on-insulator (SOI) platform. It enables an ultra-compact connection between two parallel multimode waveguides (MWGs) with an arbitrary displacement. As a proof of concept, we describe two MPJs with displacements of 5.9 µm and 0.6 µm, each supporting three modes and featuring a longitudinal distance of around 14 µm. For both MPJs, the experimental results show insertion losses (ILs) below 0.086 dB and inter-modal cross talk (CT) below −17.6 dB over the wide wavelength range of 1525–1600 nm for all three modes.