On-chip generation of Bessel-Gaussian beam via concentrically distributed grating arrays for long-range sensing.

ABSTRACT: Bessel beam featured with self-healing is essential to the optical sensing applications in the obstacle scattering environment. Integrated on-chip generation of the Bessel beam outperforms the conventional structure by small size, robustness, and alignment-free scheme. However, the maximum propagation distance (Z_max) provided by the existing approaches cannot support long-range sensing, and thus, it restricts its potential applications. In this work, we propose an integrated silicon photonic chip with unique structures featured with concentrically distributed grating arrays to generate the Bessel-Gaussian beam with a long propagation distance. The spot with the Bessel function profile is measured at 10.24 m without optical lenses, and the photonic chip's operation wavelength can

SUBMITTER: Zhi Z 

PROVIDER: S-EPMC10102187 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature