Enhanced lensed fiber for Si-nanowire coupling

Author

Song, Jeong Hwan ; Lee, Ko-Hsin ; Peters, Frank H.

Author_Institution

Integrated Photonics Group, Tyndall Nat. Inst., Cork, Ireland

fYear

2010

fDate

17-20 Aug. 2010

Firstpage

298

Lastpage

301

Abstract

We propose a lensed fiber design exhibiting good coupling efficiency together with a long working distance for the coupling of silicon based nanophotonic waveguides to a single mode optical fiber. The lensed fiber consists of a coreless fiber tip coated with a high refractive index material. Numerical simulations show that the coupling loss as low as -0.5 dB can be achieved with a working distance of ~37 μm for coupling from a nanowire waveguide with a mode field diameter of 700 nm to our lensed fiber. This optimized fiber design has a radius of curvature of 60 μm, a 800 μm-long coreless fiber section, and a 10 μm-thick coating layer with an index of 3.7.

Keywords

elemental semiconductors; nanophotonics; nanowires; optical design techniques; optical fibre couplers; optical fibre losses; refractive index; semiconductor quantum wires; silicon; Si; coating layer; coupling efficiency; coupling loss; distance 10 mum; distance 800 mum; enhanced lensed fiber; fiber design; fiber section; mode field diameter; nanophotonic waveguides; nanowire waveguide; radius 60 mum; refractive index; silicon nanowire coupling; single mode optical fiber; size 700 nm;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on

Conference_Location

Seoul

ISSN

1944-9399

Print_ISBN

978-1-4244-7033-4

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2010.5697894

Filename

5697894