Abstract

Large-scale optical phased arrays have attracted attention as devices for solid-state beam scanning employing light detection and ranging. However, conventional optical phased arrays using electro-optic phase shifters require active phase control for each antenna. Because the power consumption of the active phase shifters is proportional to the number of antennas, the total power consumption increases in a large-scale optical phased array with a narrow beam divergence. In this study, we propose a passive beam scanner that realizes two-dimensional beam scanning through the wavelength sweep of a laser light. Additionally, most studies on optical phased arrays use external laser diodes as light sources. This increases the size of the beam-scanning system. Therefore, there is a demand for integrating an optical phased array and a laser light source in a combined chip. In this study, we integrated a 64-channel passive optical phased array and a hybrid wavelength-tunable laser diode into a combined chip. The size of the device was 5 mm $ \ \times $ 1.5 mm, and the power consumption for beam scanning was 49.3 mW. The field of view was $44.2^\circ \times 13.7^\circ,$ and the full width at half maximum of the beam divergence was $0.517^\circ \times 3.67^\circ $ . Compared with the device used in a previous study, our device was nine times smaller, and the total power consumption was only tens of milliwatts. This device consumes less power and achieves a fully integrated light detection and ranging.

Silicon-based high-resolution and low-power-consumption two-dimensional beam scanner integrated with hybrid wavelength-tunable laser diode

Yamato Misugi, Tomoki Nakano, and Tomohiro Kita
Opt. Express 32(8) 13746-13760 (2024)

Practical two-dimensional beam steering system using an integrated tunable laser and an optical phased array

Weichao Ma, Su Tan, Kuankuan Wang, Weihua Guo, Ye Liu, Lianggang Liao, Lianggang Zhou, Jun Zhou, Xin Li, Lei Liang, and Wangzhe Li
Appl. Opt. 59(32) 9985-9994 (2020)

Large-scale optical phased array using a low-power multi-pass silicon photonic platform

Steven A. Miller, You-Chia Chang, Christopher T. Phare, Min Chul Shin, Moshe Zadka, Samantha P. Roberts, Brian Stern, Xingchen Ji, Aseema Mohanty, Oscar A. Jimenez Gordillo, Utsav D. Dave, and Michal Lipson
Optica 7(1) 3-6 (2020)

Fully integrated hybrid silicon two dimensional beam scanner

J. C. Hulme, J. K. Doylend, M. J. R. Heck, J. D. Peters, M. L. Davenport, J. T. Bovington, L. A. Coldren, and J. E. Bowers
Opt. Express 23(5) 5861-5874 (2015)

SiN integrated optical phased arrays for two-dimensional beam steering at a single near-infrared wavelength

Nicola A. Tyler, Daivid Fowler, Stephane Malhouitre, Stephanie Garcia, Philippe Grosse, Wilfried Rabaud, and Bertrand Szelag
Opt. Express 27(4) 5851-5858 (2019)