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End-fire silicon optical phased array with half-wavelength spacing

APL Photonics, ISSN: 2378-0967, Vol: 3, Issue: 1
2018
  • 68
    Citations
  • 0
    Usage
  • 75
    Captures
  • 0
    Mentions
  • 1
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    68
    • Citation Indexes
      66
    • Patent Family Citations
      2
      • Patent Families
        2
  • Captures
    75
  • Social Media
    1
    • Shares, Likes & Comments
      1
      • Facebook
        1

Article Description

We demonstrate an optical phased array with emitting elements spaced at half the operational wavelength. The device is a one-dimensional array fabricated on an integrated silicon platform for operation at a wavelength of 1.55 μm. Light is emitted end-fire from the chip edge where the waveguides are terminated. The innovative design and high confinement afforded by the silicon waveguides enables λ/2 spacing (775-nm pitch) at the output thereby eliminating grating lobes and maximizing the power in the main lobe. Steering is achieved by inducing a phase shift between the waveguide feeds via integrated thermo-optic heaters. The device forms a beam with a full-width half-maximum angular width of 17°, and we demonstrate beam steering over a 64° range limited only by the element factor.

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