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Proceedings Article

High efficiency quasi-ternary design for nonmechanical beam-steering utilizing polarization gratings

[+] Author Affiliations
Jihwan Kim, Matthew N. Miskiewicz, Michael J. Escuti

North Carolina State Univ. (USA)

Steve Serati

Boulder Nonlinear Systems, Inc. (USA)

Proc. SPIE 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII, 78160G (August 12, 2010); doi:10.1117/12.860885
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From Conference Volume 7816

  • Advanced Wavefront Control: Methods, Devices, and Applications VIII
  • David C. Dayton; Troy A. Rhoadarmer; Darryl J. Sanchez
  • San Diego, California, USA | August 01, 2010

abstract

We introduce and demonstrate a quasi-ternary nonmechanical beam steering design based on Polarization Gratings (PGs). That uses a single wave plate and N PGs to generate 2(N+1)-1 steering angles. When compared to conventional binary (2N) or ternary (3N) liquid crystal PG steering designs, this technique uses fewer elements arranged in a simpler configuration to obtain the same number of steering angles. This advantageous property can be achieved by selecting proper diffraction angles and alignment of the PGs. Due to fewer elements per stage, losses due to electrode absorption and Fresnel reflections are reduced, thereby increasing the overall steering efficiency. Using this approach, we demonstrate a four-stage (N = 4) quasi-ternary beam steering device that achieves 52° Field Of Regard (FOR) with 1.7° resolution (31 steering angles) at 1550 nm wavelength.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Jihwan Kim ; Matthew N. Miskiewicz ; Steve Serati and Michael J. Escuti
"High efficiency quasi-ternary design for nonmechanical beam-steering utilizing polarization gratings", Proc. SPIE 7816, Advanced Wavefront Control: Methods, Devices, and Applications VIII, 78160G (August 12, 2010); doi:10.1117/12.860885; http://dx.doi.org/10.1117/12.860885


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