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.
|Original language||English (US)|
|Number of pages||8|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|State||Published - Dec 2 1992|
|Event||Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III 1992 - Orlando, United States|
Duration: Apr 20 1992 → …
Bibliographical noteFunding Information:
Joint support by Rome Laboratory of the Air Force Systems Command, Defense Advanced Research Projects Agency, and Honeywell under contract number F30602-90-C-0062 is gratefully acknowledged. The authors thank Brian Hendrickson and David Cordeiro of Rome Laboratory, and Nisa Khan, Mark Bendett, Vladimir Sokolov, Julian Bristow, and Anis Husain of Honeywell for valuable discussions during the course of this work.
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