Thermo-optic control of the longitudinal radiation angle in a silicon-based optical phased array

被引：60

作者：

Kim, Seong-Hwan ^{[1
]}

You, Jong-Bum ^{[1
]}

Ha, Yun-Gi ^{[1
]}

Kang, Geumbong ^{[1
]}

Lee, Dae-Seong ^{[1
]}

Yoon, Hyeonho ^{[1
]}

Yoo, Dong-Eun ^{[2
]}

Lee, Dong-Wook ^{[2
]}

Yu, Kyoungsik ^{[1
]}

Youn, Chan-Hyun ^{[1
]}

Park, Hyo-Hoon ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Sch Elect Engn, Yuseong 305701, Daejeon, South Korea

[2] Natl Nanofab Ctr NNFC, Yuseong 305806, Daejeon, South Korea

来源：

OPTICS LETTERS | 2019年 / 44卷 / 02期

关键词：

ULTRA-BROAD-BAND; JUNCTION;

D O I：

10.1364/OL.44.000411

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate longitudinal beam-steering with a 1 x 16 silicon optical phased array (OPA) using a monochromatic light source and thermo-optic control of the refractive index in the grating radiator region. The refractive index is controlled by forming a series of n-i-n heaters, placing i-regions in each radiator of the OPA. When the biased voltage in the heaters is increased, the refractive index of the radiator region is increased by the thermo-optic effect, and the longitudinal radiation angle is changed according to the Bragg condition. The transversal beans-steering is accomplished by phase control with the phase shifters, which are devised with a p-i-n diode using the electro-optic effect. With these electro-optic p-i-n phase shifters and n-i-n thermo-optic radiators, we achieve a relatively wide 2D beans-steering in a range of 10.0 degrees/45.4 degrees in the longitudinal/transversal directions with a 1.55 mu m light source. The tuning efficiency is 0.016 degrees/mW in the longitudinal beam-steering. (C) 2019 Optical Society of America

引用

页码：411 / 414

页数：4

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