Gallium Arsenide Optical Phased Array Photonic Integrated Circuit

Authors: Michael Nickerson, Bowen Song, Jim Brookhyser, Gregory Erwin, Jan Kleinert, Jonathan Klamkin

arXiv: 2304.03417v1 - DOI (physics.optics)
15 pages, 2 tables, 13 figures. Submitted to Optics Express 2023-04-05
License: CC BY-SA 4.0

Abstract: A 16-channel optical phased array is fabricated on a gallium arsenide photonic integrated circuit platform with a low-complexity process. Tested with a 1064 nm external laser, the array demonstrates 0.92{\deg} beamwidth, 15.3{\deg} grating-lobe-free steering range, and 12 dB sidelobe level. Based on a reverse biased p-i-n structure, component phase modulators are 3 mm long with DC power consumption of less than 5 ${\mu}$W and greater than 770 MHz electro-optical bandwidth. Individual 4-mm-long phase modulators based on the same structure demonstrate single-sided V${\pi}{\cdot}$L modulation efficiency ranging from 0.5 V${\cdot}$cm to 1.23 V${\cdot}$cm when tested at wavelengths from 980 nm to 1360 nm.

Submitted to arXiv on 06 Apr. 2023

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