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Novel phased array optical scanning device implemented using GaAs/AlGaAs technology

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6 Author(s)
Wight, D.R. ; Defence Research Agency (DRA), Electronics Division, RSRE Malvern, St. Andrews Road, Great Malvern, Worcestershire WRl4 3PS, United Kingdom ; Heaton, J.M. ; Hughes, B.T. ; Birbeck, J.C.H.
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A novel type of optical beam scanning device based on the same principle as a phased array radar has been made and demonstrated. This phased array optical scanning device consisted of a uniformly illuminated array of ten closely spaced, single mode GaAs/AlGaAs electrooptic waveguides, each of which was individually addressed to give more than 2π radians of optical phase control. This gave a line of ten point sources of light on a 3 μm pitch at the output face of the array. By independently phase shifting these light sources the output wavefront was controlled to scan a 2° wide beam through 20° in the far field.

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Applied Physics Letters  (Volume:59 ,  Issue: 8 )