Demonstration of 2D beam steering using large-scale passive optical phased array enabled by multimode waveguides with reduced phase error

Yamato Misugi, Hideaki Okayama, Tomohiro Kita

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Optical phased arrays (OPAs) have received considerable attention as solid-state beam scanners. However, conventional OPAs that actively control the phase difference between arrays are characterized by excessive power consumption for high-precision beam emission. In this study, we fabricated an OPA comprising Bragg grating and arrayed waveguide grating (AWG). Multi-mode waveguide is used in AWG to reduce the effect of manufacturing error. This device realizes wide and high-resolution two-dimensional beam steering only by sweeping wavelength. FWHM of the emitted beam is 0.534° × 2.27°, and the steering range is 43.9° × 13.5° with 1/64 of the power consumption of conventional OPA.

Original languageEnglish
Article number102002
JournalApplied Physics Express
Volume15
Issue number10
DOIs
Publication statusPublished - 2022 Oct

Keywords

  • arrayed waveguide grating
  • optical phased array
  • silicon photonics

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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