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Low-power consumption InP-based optical phase arrays with non-uniformly spaced output waveguides

Authors :
Su Tan
Xiangyang Dai
Jiajun Lou
Liyuan Song
Can Liu
Ye Gu
Quanan Chen
Chun Jiang
Xiaonan Yu
Qiaoyin Lu
Mingzhi Lu
Shoufeng Tong
Weihua Guo
Source :
Optics Express. 31:3199
Publication Year :
2023
Publisher :
Optica Publishing Group, 2023.

Abstract

Optical Phase Arrays (OPAs) are expected to be an ideal solution to achieve beam shaping, laser radar (LIDAR), free-space optical communications, and spatially resolved optical sensors, etc. We demonstrated a low-power consumption 32-channel OPA with non-uniformly spaced waveguides based on InP substrate. The phase shifters are based on a p-i-n structure which are operated with reverse bias and have a low power consumption. Besides, in order to improve the performance especially to obtain larger steering angle and narrower beam divergence without increasing the number of channels, we have optimized the spacing between the output waveguides. The fabricated OPA achieved a steering angle of 35° with the side lobe suppression ratio more than 8.2 dB across the angle range from -20° to 20° in the far field, which is the largest phase tuning steering angle reported by InP-based OPAs as far as we know. The divergence angle is about 0.46° in the phase steering dimension and the power consumption of the OPA at each steering angle is lower than 7.5 mW.

Details

ISSN :
10944087
Volume :
31
Database :
OpenAIRE
Journal :
Optics Express
Accession number :
edsair.doi...........3c37f825a17294202c2c9b030286ff2c
Full Text :
https://doi.org/10.1364/oe.479334