Abstract
We have proposed a 128-channel silicon-based optical phased array (OPA) chip with an overall antenna, and a large two-dimensional scanning range of 104.0° × 17.6° was achieved.
Highlights
As an all-solid-state beam steering technology, optical phased array (OPA) is promising in light detection and ranging (LiDAR) fields, such as autonomous driving, three-dimensional imaging, and mapping
OPA is promising in the field of free space optical communications, and there have been some related reports in recent years [22]–[27]
We only discuss the peaks of zeroand first-orders, which are closely related to the OPA scanning range
Summary
As an all-solid-state beam steering technology, optical phased array (OPA) is promising in light detection and ranging (LiDAR) fields, such as autonomous driving, three-dimensional imaging, and mapping. For OPA-based sensing systems, in order to meet practical needs, a large scanning range is very important. Silicon-based OPA has achieved larger and larger steering angles [20], [24], [28]. Columbia University has achieved the largest steering angle (180°) by adopting an end-fire optical phased array with half-wavelength pitch [24]. It can only realize one-dimensional beam scanning, and will be limited in many applications. We have achieved a large scanning range of 104.0° in the lateral direction and 17.6° in the longitudinal direction, which can meet some two-dimensional scanning applications
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