Chip scale GaAs optical phased arrays for high speedbeam steering
2020
High speed photoelectronic optical phased arrays are demonstrated by
vertically arranged GaAs-AlGaAs slab waveguides. The optical phased arrays
are composed of 15-channel independently tuned waveguide with end-fire
emission. We achieve a very fast beam steering step response of 0.34
µs, beam divergence of 4.7°, and beam steering ranges of around
30°with side lobe level better than 8 dB. The presented optical phased
arrays provide a superior approach for high speed beam steering on a
nano-photoelectronic integrated chip.
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