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Optical phased-array beam steering controlled by wavelength.

Feng Xiao1, Weiwei Hu, Anshi Xu

  • 1National Laboratory on Local Fiber-Optic Communication Networks and Advanced Optical Communication Systems, School of Electronics Engineering and Computer Science, Peking University, China 100871.

Applied Optics
|September 16, 2005
PubMed
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This study proposes a novel wavelength-controlled optical phased-array beam steering method using irregularly spaced waveguides. This approach effectively suppresses sidelobes for advanced optical scanning applications.

Area of Science:

  • Photonics and Optical Engineering
  • Array Signal Processing

Background:

  • Optical phased arrays (OPAs) are crucial for beam steering.
  • Traditional OPAs face challenges with sidelobe suppression and element spacing.

Purpose of the Study:

  • To propose a new scheme for wavelength-controlled optical phased-array beam steering.
  • To investigate sidelobe suppression using irregularly spaced arrays.
  • To establish the relationship between waveguide length differences and element spacing.

Main Methods:

  • Designing an optical scanning device with arrayed optical waveguides featuring specific length differences.
  • Implementing wavelength control to adjust the phase slope for beam steering.
  • Utilizing irregularly spaced arrays to mitigate sidelobe issues.

Related Experiment Videos

  • Analyzing the absolute phase difference between adjacent elements.

    • Main Results:

    • Demonstrated a method for optical beam steering controlled by optical wavelength.
    • Achieved significant sidelobe suppression with irregularly spaced arrays, even with large element spacing.
    • Established a relationship between non-uniform length differences and center-to-center element spacing.

    Conclusions:

    • The proposed wavelength-controlled OPA scheme offers effective beam steering.
    • Irregular array spacing is a viable strategy for sidelobe reduction in OPAs.
    • Understanding phase differences is key to optimizing optical beam steering performance.