Multimode-enabled silicon photonic delay lines: break the delay-density limit.

ABSTRACT: Integrated optical delay lines have become imperative to meet the growing demand as large aperture antennas and high number of subarrays required for microwave beamforming, high-speed optical communication, and integrated quantum photonics. It is very challenging to achieve large delay ranges, small footprints, and broad bandwidths simultaneously due to the strong trade-off between the propagation loss and the group refractive index of optical waveguides. In this paper, we propose and experimentally demonstrate multimode-enabled silicon photonic delay line for the first time, which breaks the delay-density limit of singlemode waveguide spirals, towards a broadband, mm²-scale, and ultra-large time delay. By demonstrating low-loss-propagation possibilities for different polarizati

SUBMITTER: Hong S 

PROVIDER: S-EPMC11958738 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature