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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 29 — Oct. 10, 2013
  • pp: 7109–7116

Direct investigation and accurate control of phase profile in liquid-crystal optical-phased array for beam steering

Xiangjie Zhao, Cangli Liu, Dayong Zhang, and Yongquan Luo  »View Author Affiliations

Applied Optics, Vol. 52, Issue 29, pp. 7109-7116 (2013)

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An experimental setup and simple method were proposed to investigate and control the actual phase profile in a high-spatial-resolution liquid-crystal optical-phased array (LCOPA). A crossed polarizer and high-resolution microscope objective were employed to transform the light distribution out of the liquid-crystal layer into a polarization-interference pattern in which the phase-profile information was wrapped. The polarization-interference pattern was then directly translated into the actual phase profile. Based on this setup, a method was developed to accurately control the actual phase profile, and the steering efficiency at the steering angle of 16 mrad was increased from 80% to 90%. The proposed method also helps in increasing the steering efficiency when disclination lines appear.

© 2013 Optical Society of America

OCIS Codes
(050.1380) Diffraction and gratings : Binary optics
(050.1950) Diffraction and gratings : Diffraction gratings
(050.5080) Diffraction and gratings : Phase shift
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.5060) Instrumentation, measurement, and metrology : Phase modulation

ToC Category:
Diffraction and Gratings

Original Manuscript: June 7, 2013
Revised Manuscript: August 1, 2013
Manuscript Accepted: September 2, 2013
Published: October 3, 2013

Xiangjie Zhao, Cangli Liu, Dayong Zhang, and Yongquan Luo, "Direct investigation and accurate control of phase profile in liquid-crystal optical-phased array for beam steering," Appl. Opt. 52, 7109-7116 (2013)

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