Switched time delay elements based on AlGaAs/GaAs optical waveguide technology at 1.32µm for optically controlled phased array antennas

Conference Paper

Integrated optical time-shift networks consisting of cascaded pairs of 2×2 linear electro-optic (EO) switches and optical delay lines in GaAs waveguides at 1.32 µm are investigated for true-time optical beamforming in phased array antennas. We report new state-of-the-art results in curved waveguide and corner bend insertion loss, and preliminary results from 2-bit time delay generators (TDGs) constructed in the form of GaAs-based photonic integrated circuits (PICs) utilizing these components. To our knowledge, these are the largest GaAs PICs built to date. These results represent significant progress in our longer-term goal of demonstrating a 7-bit TDG with a loss matching monolithic microwave integrated circuit (MMIC) delay line techniques, while providing very wide bandwidth unmatched by MMIC technology.

Full Text

Duke Authors

Cited Authors

  • Sullivan, CT; Mukherjee, SD; Hibbs-Brenner, MK; Gopinath, A; Kalweit, E; Marta, T; Goldberg, W; Walterson, R

Published Date

  • December 2, 1992

Published In

Volume / Issue

  • 1703 /

Start / End Page

  • 264 - 271

Electronic International Standard Serial Number (EISSN)

  • 1996-756X

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.138393

Citation Source

  • Scopus