A Large-Range Steering Optical Phased Array Chip and High-Speed Controlling System

The optical phased array (OPA) chip is becoming the core component of all-solid-state lidars. In order to realize the wide-angle range beam scanning and rapid control of OPA-based solid-state lidars, we design and fabricate a 64-channel silicon-based OPA chip based on thermo-optical modulation. In a...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement Jg. 71; S. 1 - 12
Hauptverfasser: Tao, Min, Peng, Tao, Ding, Changchun, Guan, Jian, Li, Yingzhi, Zhang, Lanxuan, Chena, Baisong, Gao, Liangli, Li, Xueyan, Song, Junfeng, Gao, Fengli
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Beam scanning
Field programmable gate arrays
field-programmable logic gate array (FPGA)
High speed
Laser radar
Logic circuits
Optical device fabrication
optical phase control
optical phased array (OPA)
Optical refraction
Optical variables control
Optical waveguides
Phase control
Phase modulation
Phased arrays
Programmable logic arrays
Radar scanning
Random access memory
Solid state
solid-state lidar
Steering
ISSN:0018-9456, 1557-9662
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Zusammenfassung:The optical phased array (OPA) chip is becoming the core component of all-solid-state lidars. In order to realize the wide-angle range beam scanning and rapid control of OPA-based solid-state lidars, we design and fabricate a 64-channel silicon-based OPA chip based on thermo-optical modulation. In accordance with the optical phase control characteristics of the multichannel thermo-optic OPA chip, we propose a parallel random access memory (RAM) array technique to realize high-speed phase control for the OPA chip and build the hardware system with a field-programmable logic gate array (FPGA). This system is used to test the main performance indicators of the OPA chip and realizes the high-speed scanning control of the wide-angle range of the OPA output beam. The test results show that the OPA chip we designed can achieve fast beam scanning within a large angle range between −32.5° and +32.5°, and the chip has high working reliability. Combined with the control system we build, it can meet the high-speed radar scanning requirements of all-solid-state lidars. This work lays a good foundation for the subsequential development of our thermo-optical and electrooptic OPA all-solid-state lidar prototypes.
Bibliographie:ObjectType-Article-1
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content type line 14
ISSN:0018-9456
1557-9662
DOI:10.1109/TIM.2021.3139692