Fast beam steering with an optical phased array

David R. Gozzard, Lyle E. Roberts, James T. Spollard, Paul G. Sibley, Daniel A. Shaddock

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Optical phased arrays (OPAs) are devices that use the coherence of light to control the interference pattern in the far field, which enables them to steer a laser beam with no moving parts. As such, OPAs have potential applications in laser communications, target acquisition and tracking, metrology, and directed energy. In this Letter, we present a control architecture for an actively phase-locked OPA, capable of steering a laser beam at speeds limited by the actuation bandwidth of electro-optic modulators. The system achieved an output phase stability of λ/770 and steering speeds up to 1 MHz. The digital control architecture can be extended to GHz steering speeds, is readily scalable to hundreds of emitters, and is compatible with high-power arrays.

Original languageEnglish
Pages (from-to)3793-3796
Number of pages4
JournalOptics Letters
Issue number13
Publication statusPublished - 1 Jul 2020
Externally publishedYes


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