期刊
OPTICS LETTERS
卷 45, 期 13, 页码 3793-3796出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.393007
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资金
- Australian Research Council [CE170100004, CE170100009]
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 lambda/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. (C) 2020 Optical Society of America
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