Compact and broadband adiabatically bent superlattice-waveguides with negligible insertion loss and ultra-low crosstalk

Humaira Zafar; Bruna Paredes; Inas Taha; Juan E. Villegas; Mahmoud Rasras; Mauro F. Pereira

doi:10.1109/JSTQE.2023.3241617

Compact and broadband adiabatically bent superlattice-waveguides with negligible insertion loss and ultra-low crosstalk

Humaira Zafar, Bruna Paredes, Inas Taha, Juan E. Villegas, Mahmoud Rasras, Mauro F. Pereira

Research output: Contribution to journal › Article › peer-review

Abstract

Broadband and ultra-low crosstalk integrated silicon superlattice waveguides are proposed and demonstrated, enabling high-density waveguide integration. The superlattice waveguides are implemented as S-shaped adiabatic bends that yield ultra-low crosstalks in the neighboring channels, and an extremely low insertion loss, for the TE polarization. Special materials or complex fabrication steps are not required. The bent superlattice waveguides are measured to have an average insertion loss <inline-formula><tex-math notation="LaTeX">$\leq 0.1 \rm{dB}$</tex-math></inline-formula> for all channels. The average crosstalk values are <inline-formula><tex-math notation="LaTeX">$\leq -37.8 \rm{dB}$</tex-math></inline-formula> and <inline-formula><tex-math notation="LaTeX">$\leq -45.2 \rm{dB}$</tex-math></inline-formula>, in the first nearest neighboring waveguide and the second nearest neighboring waveguide, respectively. The transmission spectra are measured over the wavelength ranges of (<inline-formula><tex-math notation="LaTeX">$1.24 \mu \rm{m}$</tex-math></inline-formula> to <inline-formula><tex-math notation="LaTeX">$1.38 \mu \rm{m}$</tex-math></inline-formula>) and (<inline-formula><tex-math notation="LaTeX">$1.45 \mu \rm{m}$</tex-math></inline-formula> to <inline-formula><tex-math notation="LaTeX">$1.65 \mu \rm{m}$</tex-math></inline-formula>), covering both communication wavelengths of <inline-formula><tex-math notation="LaTeX">$1310$</tex-math></inline-formula> and <inline-formula><tex-math notation="LaTeX">$1550\, \rm{nm}$</tex-math></inline-formula>. The simulation results predict an efficient broadband performance over the <inline-formula><tex-math notation="LaTeX">$500\, \rm{nm}$</tex-math></inline-formula> wavelength range (<inline-formula><tex-math notation="LaTeX">$1200\, \rm{nm}$</tex-math></inline-formula> to <inline-formula><tex-math notation="LaTeX">$1700\, \rm{nm}$</tex-math></inline-formula>), covering all O, E, S, C, L & U bands. The proof of concept was done for a silicon-on-insulator platform and the approach is applicable to other waveguide geometries and integrated photonic platforms.

Original language	English (US)
Pages (from-to)	1-9
Number of pages	9
Journal	IEEE Journal of Selected Topics in Quantum Electronics
DOIs	https://doi.org/10.1109/JSTQE.2023.3241617
State	Accepted/In press - 2023

Keywords

adiabatic
Bending
Crosstalk
Insertion loss
Optical device fabrication
Optical waveguides
optical waveguides
Silicon Photonics
Silicon-on-insulator
silicon-on-insulator
superlattices
transverse electric
Waveguide junctions

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1109/JSTQE.2023.3241617

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@article{6f77b0f304e34b1695e40dbdc5c76df8,

title = "Compact and broadband adiabatically bent superlattice-waveguides with negligible insertion loss and ultra-low crosstalk",

abstract = "Broadband and ultra-low crosstalk integrated silicon superlattice waveguides are proposed and demonstrated, enabling high-density waveguide integration. The superlattice waveguides are implemented as S-shaped adiabatic bends that yield ultra-low crosstalks in the neighboring channels, and an extremely low insertion loss, for the TE polarization. Special materials or complex fabrication steps are not required. The bent superlattice waveguides are measured to have an average insertion loss $\leq 0.1 \rm{dB}$ for all channels. The average crosstalk values are $\leq -37.8 \rm{dB}$ and $\leq -45.2 \rm{dB}$, in the first nearest neighboring waveguide and the second nearest neighboring waveguide, respectively. The transmission spectra are measured over the wavelength ranges of ($1.24 \mu \rm{m}$ to $1.38 \mu \rm{m}$) and ($1.45 \mu \rm{m}$ to $1.65 \mu \rm{m}$), covering both communication wavelengths of $1310$ and $1550\, \rm{nm}$. The simulation results predict an efficient broadband performance over the $500\, \rm{nm}$ wavelength range ($1200\, \rm{nm}$ to $1700\, \rm{nm}$), covering all O, E, S, C, L & U bands. The proof of concept was done for a silicon-on-insulator platform and the approach is applicable to other waveguide geometries and integrated photonic platforms.",

keywords = "adiabatic, Bending, Crosstalk, Insertion loss, Optical device fabrication, Optical waveguides, optical waveguides, Silicon Photonics, Silicon-on-insulator, silicon-on-insulator, superlattices, transverse electric, Waveguide junctions",

author = "Humaira Zafar and Bruna Paredes and Inas Taha and Villegas, {Juan E.} and Mahmoud Rasras and Pereira, {Mauro F.}",

note = "Publisher Copyright: Author",

year = "2023",

doi = "10.1109/JSTQE.2023.3241617",

language = "English (US)",

pages = "1--9",

journal = "IEEE Journal of Selected Topics in Quantum Electronics",

issn = "1077-260X",

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TY - JOUR

T1 - Compact and broadband adiabatically bent superlattice-waveguides with negligible insertion loss and ultra-low crosstalk

AU - Zafar, Humaira

AU - Paredes, Bruna

AU - Taha, Inas

AU - Villegas, Juan E.

AU - Rasras, Mahmoud

AU - Pereira, Mauro F.

N1 - Publisher Copyright: Author

PY - 2023

Y1 - 2023

N2 - Broadband and ultra-low crosstalk integrated silicon superlattice waveguides are proposed and demonstrated, enabling high-density waveguide integration. The superlattice waveguides are implemented as S-shaped adiabatic bends that yield ultra-low crosstalks in the neighboring channels, and an extremely low insertion loss, for the TE polarization. Special materials or complex fabrication steps are not required. The bent superlattice waveguides are measured to have an average insertion loss $\leq 0.1 \rm{dB}$ for all channels. The average crosstalk values are $\leq -37.8 \rm{dB}$ and $\leq -45.2 \rm{dB}$, in the first nearest neighboring waveguide and the second nearest neighboring waveguide, respectively. The transmission spectra are measured over the wavelength ranges of ($1.24 \mu \rm{m}$ to $1.38 \mu \rm{m}$) and ($1.45 \mu \rm{m}$ to $1.65 \mu \rm{m}$), covering both communication wavelengths of $1310$ and $1550\, \rm{nm}$. The simulation results predict an efficient broadband performance over the $500\, \rm{nm}$ wavelength range ($1200\, \rm{nm}$ to $1700\, \rm{nm}$), covering all O, E, S, C, L & U bands. The proof of concept was done for a silicon-on-insulator platform and the approach is applicable to other waveguide geometries and integrated photonic platforms.

AB - Broadband and ultra-low crosstalk integrated silicon superlattice waveguides are proposed and demonstrated, enabling high-density waveguide integration. The superlattice waveguides are implemented as S-shaped adiabatic bends that yield ultra-low crosstalks in the neighboring channels, and an extremely low insertion loss, for the TE polarization. Special materials or complex fabrication steps are not required. The bent superlattice waveguides are measured to have an average insertion loss $\leq 0.1 \rm{dB}$ for all channels. The average crosstalk values are $\leq -37.8 \rm{dB}$ and $\leq -45.2 \rm{dB}$, in the first nearest neighboring waveguide and the second nearest neighboring waveguide, respectively. The transmission spectra are measured over the wavelength ranges of ($1.24 \mu \rm{m}$ to $1.38 \mu \rm{m}$) and ($1.45 \mu \rm{m}$ to $1.65 \mu \rm{m}$), covering both communication wavelengths of $1310$ and $1550\, \rm{nm}$. The simulation results predict an efficient broadband performance over the $500\, \rm{nm}$ wavelength range ($1200\, \rm{nm}$ to $1700\, \rm{nm}$), covering all O, E, S, C, L & U bands. The proof of concept was done for a silicon-on-insulator platform and the approach is applicable to other waveguide geometries and integrated photonic platforms.

KW - adiabatic

KW - Bending

KW - Crosstalk

KW - Insertion loss

KW - Optical device fabrication

KW - Optical waveguides

KW - optical waveguides

KW - Silicon Photonics

KW - Silicon-on-insulator

KW - silicon-on-insulator

KW - superlattices

KW - transverse electric

KW - Waveguide junctions

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DO - 10.1109/JSTQE.2023.3241617

M3 - Article

AN - SCOPUS:85148465740

SN - 1077-260X

SP - 1

EP - 9

JO - IEEE Journal of Selected Topics in Quantum Electronics

JF - IEEE Journal of Selected Topics in Quantum Electronics

ER -

Compact and broadband adiabatically bent superlattice-waveguides with negligible insertion loss and ultra-low crosstalk

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Keywords

ASJC Scopus subject areas

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