Demonstration of 2D beam steering using large-scale passive optical phased array enabled by multimode waveguides with reduced phase error

被引：10
|
作者：
Misugi, Yamato [1 ]
Okayama, Hideaki [2 ]
Kita, Tomohiro [1 ]
机构：
[1] Waseda Univ, Fac Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan
[2] OKi Elect Ind Co Ltd, Saitama 3358510, Japan
来源：
APPLIED PHYSICS EXPRESS | 2022年 / 15卷 / 10期
关键词：
silicon photonics; optical phased array; arrayed waveguide grating; LIDAR;
D O I：
10.35848/1882-0786/ac9033
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Optical phased arrays (OPAs) have received considerable attention as solid-state beam scanners. However, conventional OPAs that actively control the phase difference between arrays are characterized by excessive power consumption for high-precision beam emission. In this study, we fabricated an OPA comprising Bragg grating and arrayed waveguide grating (AWG). Multi-mode waveguide is used in AWG to reduce the effect of manufacturing error. This device realizes wide and high-resolution two-dimensional beam steering only by sweeping wavelength. FWHM of the emitted beam is 0.534 degrees x 2.27 degrees, and the steering range is 43.9 degrees x 13.5 degrees with 1/64 of the power consumption of conventional OPA.
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页数：5
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