A compact silicon grating coupler based on hollow tapered spot-size converter.

Abstract:

:A new compact silicon grating coupler enabling fibre-to-chip light coupling at a minimized taper length is proposed. The proposed coupler, which incorporates a hollow tapered waveguide, converts the spot-size of optical modes from micro- to nano-scales by reducing the lateral dimension from 15 µm to 300 nm at a length equals to 60 µm. The incorporation of such a coupler in photonic integrated circuit causes a physical footprint as small as 81 µm × 15 µm with coupling efficiency and 3-dB coupling bandwidth as high as 72% and 69 nm respectively.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Asaduzzaman M,Bakaul M,Skafidas E,Khandokar MRH

doi

10.1038/s41598-018-20875-3

subject

Has Abstract

pub_date

2018-02-07 00:00:00

pages

2540

issue

1

issn

2045-2322

pii

10.1038/s41598-018-20875-3

journal_volume

8

pub_type

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