Optimal design of linear tapered double S-shaped arrayed waveguide grating for broad channel spacing on silicon-on-insulator

Nurjuliana Juhari; P. Susthitha Menon; Abang Annuar Ehsan; Sahbudin B. Shaari

doi:10.1117/1.OE.53.8.087110

28 August 2014 Optimal design of linear tapered double S-shaped arrayed waveguide grating for broad channel spacing on silicon-on-insulator

Nurjuliana Juhari, P. Susthitha Menon, Abang Annuar Ehsan, Sahbudin B. Shaari

Author Affiliations +

Funded by: Universiti Kebangsaan Malaysia (UKM), Malaysian Ministry of Education

Optical Engineering, Vol. 53, Issue 8, 087110 (August 2014). https://doi.org/10.1117/1.OE.53.8.087110

Abstract

A linear tapered double S-shaped arrayed waveguide grating (AWG) was designed as an alternative to a U-shaped AWG, and a complete transmission spectrum for 18 channels of coarse wavelength-division multiplexing (CWDM) was demonstrated. The silicon-on-insulator based AWG with a rib waveguide structure with a broad channel spacing of 20 nm was designed to serve as a multiplexer/demultiplexer. A beam propagation method modeling simulation under transverse electric mode polarization over a free spectrum range of 700 nm was used for the design process. The geometrical dimensions of the AWG rib structure were optimized to achieve the lowest reported insertion loss of 1.07 dB and adjacent crosstalk of −38.83 dB . The influence of different etching depths on the top Si layer of the AWG for a constant core width of 0.6 μm as well as birefringence effects were also investigated. A transmission spectrum response at the output port close to the standard CWDM wavelength grid range of 1271 to 1611 nm with an average channel spacing of 2485 GHz was obtained.

CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Nurjuliana Juhari, P. Susthitha Menon, Abang Annuar Ehsan, and Sahbudin B. Shaari "Optimal design of linear tapered double S-shaped arrayed waveguide grating for broad channel spacing on silicon-on-insulator," Optical Engineering 53(8), 087110 (28 August 2014). https://doi.org/10.1117/1.OE.53.8.087110

Published: 28 August 2014

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Cited by 4 scholarly publications.

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KEYWORDS

Waveguides

Silicon

Coarse wavelength division multiplexing

Etching

Optical design

Birefringence

Optical engineering

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