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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 42, Iss. 8 — Mar. 10, 2003
  • pp: 1409–1416

Demonstration of a linear optical true-time delay device by use of a microelectromechanical mirror array

Amber Rader and Betty Lise Anderson  »View Author Affiliations


Applied Optics, Vol. 42, Issue 8, pp. 1409-1416 (2003)
http://dx.doi.org/10.1364/AO.42.001409


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Abstract

We present the design and proof-of-concept demonstration of an optical device capable of producing true-time delay(s) (TTD)(s) for phased array antennas. This TTD device uses a free-space approach consisting of a single microelectromechanical systems (MEMS) mirror array in a multiple reflection spherical mirror configuration based on the White cell. Divergence is avoided by periodic refocusing by the mirrors. By using the MEMS mirror to switch between paths of different lengths, time delays are generated. Six different delays in 1-ns increments were demonstrated by using the Texas Instruments Digital Micromirror DeviceĀ® as the switching element. Losses of 1.6 to 5.2 dB per bounce and crosstalk of -27 dB were also measured, both resulting primarily from diffraction from holes in each pixel and the inter-pixel gaps of the MEMS.

© 2003 Optical Society of America

OCIS Codes
(070.1170) Fourier optics and signal processing : Analog optical signal processing
(280.5110) Remote sensing and sensors : Phased-array radar

History
Original Manuscript: September 6, 2002
Revised Manuscript: November 1, 2002
Published: March 10, 2003

Citation
Amber Rader and Betty Lise Anderson, "Demonstration of a linear optical true-time delay device by use of a microelectromechanical mirror array," Appl. Opt. 42, 1409-1416 (2003)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-42-8-1409

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