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Ultrabroadband High Coupling Efficiency Fiber-to-Waveguide Coupler Using Si$_{3}$N$_{4}$ /SiO$_{2}$ Waveguides on Silicon

Authors :
Mario Dagenais
Sylvain Veilleux
Joss Bland-Hawthorn
Pradip Gatkine
Yiwen Hu
Tiecheng Zhu
Source :
IEEE Photonics Journal. 8:1-12
Publication Year :
2016
Publisher :
Institute of Electrical and Electronics Engineers (IEEE), 2016.

Abstract

An easy-to-fabricate but very efficient fiber-to-waveguide coupler is theoretically analyzed and experimentally demonstrated. In this design, light from a single-mode fiber can be butt coupled into a single-mode high-index-contrast Si $_{3}$ N $_{4}$ /SiO $_{2}$ waveguide with a measured coupling efficiency of 96% at the wavelength of 1550 nm and $>$ 90% in the spectral range from 1450 to 1650 nm. Large horizontal and vertical alignment tolerances of 3.8 $\mu \text{m}$ and 3.6 $\mu \text{m}$ , respectively, are obtained between the fiber and the waveguide coupler. All these experimental results agree well with simulations. The waveguide coupler also features ease of end-facet cleaving and can be used in ultrabroadband high coupling efficiency applications.

Details

ISSN :
19430647
Volume :
8
Database :
OpenAIRE
Journal :
IEEE Photonics Journal
Accession number :
edsair.doi...........e29db538e3efd71978c4aadd28ff46da
Full Text :
https://doi.org/10.1109/jphot.2016.2600037