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Polynomial-based optical true-time delay devices with microelectromechanical mirror arrays.

Betty Lise Anderson1, Rashmi Mital

  • 1Department of Electrical Engineering, The Ohio State University, Columbus 43210, USA. anderson@ee.eng.ohio-state.edu

Applied Optics
|September 13, 2002
PubMed
Summary

This study introduces microelectromechanical (MEM) mirror arrays to enhance optical true-time delay devices for phased-array radars. These new designs can generate thousands of unique delays with minimal light bounces, improving radar performance.

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Area of Science:

  • Optoelectronics
  • Radar Systems Engineering
  • Materials Science

Background:

  • Optical true-time delay devices are crucial for phased-array radar systems.
  • Previous White cell-based devices demonstrated quadratic delay capabilities.

Purpose of the Study:

  • To explore the potential of microelectromechanical (MEM) tip/tilt mirror arrays in optical true-time delay devices.
  • To design and compare quadratic, quartic, and octic delay cells utilizing MEM mirror arrays.

Main Methods:

  • Utilized MEM mirror arrays with varying stable tilt states (two, three, and five angles).
  • Developed and analyzed designs for quadratic, quartic, and octic optical delay cells.
  • Investigated the relationship between cell order, MEM states, and achievable delays.

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Main Results:

  • An octic cell configuration with a three-state MEM mirror array achieved 6,339 distinct optical delays.
  • This high number of delays was realized within only 17 light bounces.
  • Demonstrated the scalability and efficiency of MEM-based optical delay lines.

Conclusions:

  • MEM tip/tilt mirror arrays offer a significant advancement in optical true-time delay technology.
  • The proposed MEM-based designs provide a versatile and high-performance solution for phased-array radar applications.
  • Future work can explore further optimization of MEM arrays for even greater delay capabilities.