Integrated high-speed digital optical true-time-delay module for synthetic aperture radars

James Foshee; Suning Tang; Jennifer Colegrove; Yuanji Tang; Jibing Lin; Xuping Zhang

doi:10.1117/12.568952

17 January 2005 Integrated high-speed digital optical true-time-delay module for synthetic aperture radars

James Foshee, Suning Tang, Jennifer Colegrove, Yuanji Tang, Jibing Lin, Xuping Zhang

Proceedings Volume 5644, Optoelectronic Devices and Integration; (2005) https://doi.org/10.1117/12.568952
Event: Photonics Asia, 2004, Beijing, China

Abstract

This paper provides a description of the research for the development of an integrated high speed true-time-delay module for synthetic aperture radars. The unique feature of the approach is that the true-time-delay waveguide circuit and electro-optic switching elements are integrated. As a result this integration significantly reduces the device size while simplifying the difficult packaging problem associated with the interfaces between optical fibers and optical switches. Such a monolithic approach provides greater precision for the RF phase control that the phase control provided by fiber-delay-lines as a result to the submicrometer accuracy of lithography-defined polymeric waveguides. More importantly, the optical switched true-time-delay network requires less electrical power due to the low power consumption of electrically-switchable waveguide gratings. Furthermore, the electrically-switchable waveguide gratings have a very fast switching speed (<50 μs) that is at least 100 time faster than any existing commercial optical switching matrix.

Citation Download Citation

James Foshee, Suning Tang, Jennifer Colegrove, Yuanji Tang, Jibing Lin, and Xuping Zhang "Integrated high-speed digital optical true-time-delay module for synthetic aperture radars", Proc. SPIE 5644, Optoelectronic Devices and Integration, (17 January 2005); https://doi.org/10.1117/12.568952

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KEYWORDS

Waveguides

Polymers

Liquid crystals

Fiber Bragg gratings

Polymer multimode waveguides

Synthetic aperture radar

Integrated optics

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