Polarization-independent nonuniform grating couplers on silicon-on-insulator

被引：36
|
作者：
Song, Jeong Hwan [1 ]
Doany, Fuad E. [1 ]
Medhin, Ashenafi K. [1 ,2 ]
Dupuis, Nicolas [1 ]
Lee, Benjamin G. [1 ]
Libsch, Frank R. [1 ]
机构：
[1] IBM Thomas J Watson Res Ctr, New York, NY 10598 USA
[2] Tech Univ Denmark, DK-2800 Lyngby, Denmark
来源：
OPTICS LETTERS | 2015年 / 40卷 / 17期
关键词：
PHOTONIC INTEGRATED-CIRCUITS; NANOPHOTONIC WAVE-GUIDES; OPTICAL-FIBERS; CMOS; PLATFORM;
D O I：
10.1364/OL.40.003941
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Grating couplers are proposed for polarization-independent coupling of light between a single-mode fiber and a 220-nm-thick channel waveguide on silicon-on-insulator. The grating couplers have nonuniform grating periods that are composed of the intersection or union of a set of two near-optimal TE- and TM-grating periods. The proposed grating couplers have a coupling efficiency greater than 20% and polarization dependent loss (PDL) lower than 0.5 dB within 3-dB bandwidth in design. For the evaluation of the design concept, a fabricated intersection grating coupler has the PDL of less than 0.8 dB within the wavelength range of 1540 to 1560 nm, and the coupling efficiency is similar to 18%. (C) 2015 Optical Society of America
引用
收藏
页码：3941 / 3944
页数：4
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