Chirped and apodized grating couplers on lithium niobate thin film

被引：29
|
作者：
Chen, Zhihua [1 ]
Ning, Yufu [1 ]
Xun, Yang [1 ]
机构：
[1] Shandong Youth Univ Polit Sci, Sch Informat Engn, Jinan 250103, Peoples R China
来源：
OPTICAL MATERIALS EXPRESS | 2020年 / 10卷 / 10期
基金：
中国国家自然科学基金;
关键词：
WAVE-GUIDES; FIBER; CHIP; RESONATORS; GENERATION; COMPACT;
D O I：
10.1364/OME.402604
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Chirped and apodized grating couplers were designed, fabricated and characterized in lithium niobate thin film for fiber-to-chip coupling. The maximum coupling efficiency of -1.8dB and -6.9dB for TE mode at a wavelength of 1550 nm was simulated and measured, respectively. The discrepancies were mainly attributed to the different fabrication errors of local periods and groove widths, which hampered the mode matching condition heavily. In addition, when a metal bottom reflector was added, the simulated and measured coupling efficiency were improved to -0.8 dB and -5.5 dB, respectively. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：2513 / 2521
页数：9
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