Ultra-Broadband Mode Converter and Multiplexer Based on Sub-Wavelength Structures

Ultra-Broadband Mode Converter and Multiplexer Based on Sub-Wavelength Structures

Current bandwidth capacity provided by wavelength-division multiplexing and polarization-division multiplexing is insufficient to keep up with the increasing bandwidth demand required for new services. Mode-division multiplexing technology paves the way to further increase transmission and bandwidth...

Full description

Saved in:
Bibliographic Details
Main Authors: David Gonzalez-Andrade, Juan Gonzalo Wanguemert-Perez, Aitor Velasco, Alejandro Ortega-Monux, Alaine Herrero-Bermello, Inigo Molina-Fernandez, Robert Halir, Pavel Cheben
Format: Article
Language:English
Published: IEEE 2018-01-01
Series:IEEE Photonics Journal
Subjects:
Mode-division multiplexing
mode-converter
broadband
sub-wavelength grating waveguides
silicon-on-insulator
Online Access:https://ieeexplore.ieee.org/document/8326504/
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Current bandwidth capacity provided by wavelength-division multiplexing and polarization-division multiplexing is insufficient to keep up with the increasing bandwidth demand required for new services. Mode-division multiplexing technology paves the way to further increase transmission and bandwidth capacities in photonic interconnects. In this work, we propose an ultra-broadband two-mode converter and de/multiplexer based on a sub-wavelength engineered multimode interference coupler, a 90<inline-formula><tex-math notation="LaTeX">$^{\circ }$</tex-math></inline-formula> phase shifter, and a symmetric Y-junction for the silicon-on-insulator platform. Sub-wavelength grating waveguides enable dispersion engineering to further increase the bandwidth operation of conventional multimode interference coupler and, subsequently, of mode de/multiplexer based on them. Full three-dimensional simulations of the designed mode converter and de/multiplexer show insertion loss below than 0.84&#x00A0;dB and crosstalk lower than <inline-formula> <tex-math notation="LaTeX">$-$</tex-math></inline-formula>20&#x00A0;dB over an unprecedented bandwidth of 300&#x00A0;nm (1.4&#x2013;1.7&#x00A0;<inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m). The overall footprint of the proposed device is only 36&#x00A0;<inline-formula><tex-math notation="LaTeX">$\mu$</tex-math> </inline-formula>m <inline-formula><tex-math notation="LaTeX">$\times$</tex-math></inline-formula> 3.7&#x00A0; <inline-formula><tex-math notation="LaTeX">$\mu$</tex-math></inline-formula>m.
ISSN:1943-0655

Similar Items