Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers

Quandong Huang; Yunfei Wu; Wei Jin; Kin Seng Chiang

doi:10.1109/JLT.2018.2829143

Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers

Quandong Huang, Yunfei Wu, Wei Jin, Kin Seng Chiang^*

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

72 Citations (Scopus)

85 Downloads (CityUHK Scholars)

Abstract

We report a mode (de)multiplexer based on the structure of cascaded vertical waveguide directional couplers, where the spatial modes of a few-mode core are coupled to various single-mode cores placed above the few-core core. Using five cascaded directional couplers, we design and fabricate a six-mode (de)multiplexer with polymer material that can spatially combine or separate the E₁₁, E₂₁, E₁₂, E₂₂, E₃₁, and E₁₃ modes. A typical fabricated device, which has a length of 29 mm, provides coupling ratios varying from 62% to 90% and modal crosstalks from −28.2 to −11.6 dB in the wavelength range from 1530 to 1565 nm with weak polarization dependence. The proposed structure is simple and scalable and could be developed into a range of mode-controlling devices for mode-division-multiplexing applications based on few-mode fibers.

Original language	English
Pages (from-to)	2903-2911
Journal	Journal of Lightwave Technology
Volume	36
Issue number	14
Online published	23 Apr 2018
DOIs	https://doi.org/10.1109/JLT.2018.2829143
Publication status	Published - 15 Jul 2018

Research Keywords

Couplings
Integrated optics devices
multiplexing
Optical fiber couplers
Optical fiber devices
Optical fiber polarization
optical polymer
optical waveguide components
optical waveguide couplers
Polymers

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED POSTPRINT FILE: © 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. Huang, Q., Wu, Y., Jin, W., & Chiang, K. S. (2018). Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers. Journal of Lightwave Technology, 36(14), 2903-2911. https://doi.org/10.1109/JLT.2018.2829143.

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title = "Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers",

abstract = "We report a mode (de)multiplexer based on the structure of cascaded vertical waveguide directional couplers, where the spatial modes of a few-mode core are coupled to various single-mode cores placed above the few-core core. Using five cascaded directional couplers, we design and fabricate a six-mode (de)multiplexer with polymer material that can spatially combine or separate the E11, E21, E12, E22, E31, and E13 modes. A typical fabricated device, which has a length of 29 mm, provides coupling ratios varying from 62% to 90% and modal crosstalks from −28.2 to −11.6 dB in the wavelength range from 1530 to 1565 nm with weak polarization dependence. The proposed structure is simple and scalable and could be developed into a range of mode-controlling devices for mode-division-multiplexing applications based on few-mode fibers.",

keywords = "Couplings, Integrated optics devices, multiplexing, Optical fiber couplers, Optical fiber devices, Optical fiber polarization, optical polymer, optical waveguide components, optical waveguide couplers, Polymers",

author = "Quandong Huang and Yunfei Wu and Wei Jin and Chiang, {Kin Seng}",

year = "2018",

month = jul,

day = "15",

doi = "10.1109/JLT.2018.2829143",

language = "English",

volume = "36",

pages = "2903--2911",

journal = "Journal of Lightwave Technology",

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TY - JOUR

T1 - Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers

AU - Huang, Quandong

AU - Wu, Yunfei

AU - Jin, Wei

AU - Chiang, Kin Seng

PY - 2018/7/15

Y1 - 2018/7/15

N2 - We report a mode (de)multiplexer based on the structure of cascaded vertical waveguide directional couplers, where the spatial modes of a few-mode core are coupled to various single-mode cores placed above the few-core core. Using five cascaded directional couplers, we design and fabricate a six-mode (de)multiplexer with polymer material that can spatially combine or separate the E11, E21, E12, E22, E31, and E13 modes. A typical fabricated device, which has a length of 29 mm, provides coupling ratios varying from 62% to 90% and modal crosstalks from −28.2 to −11.6 dB in the wavelength range from 1530 to 1565 nm with weak polarization dependence. The proposed structure is simple and scalable and could be developed into a range of mode-controlling devices for mode-division-multiplexing applications based on few-mode fibers.

AB - We report a mode (de)multiplexer based on the structure of cascaded vertical waveguide directional couplers, where the spatial modes of a few-mode core are coupled to various single-mode cores placed above the few-core core. Using five cascaded directional couplers, we design and fabricate a six-mode (de)multiplexer with polymer material that can spatially combine or separate the E11, E21, E12, E22, E31, and E13 modes. A typical fabricated device, which has a length of 29 mm, provides coupling ratios varying from 62% to 90% and modal crosstalks from −28.2 to −11.6 dB in the wavelength range from 1530 to 1565 nm with weak polarization dependence. The proposed structure is simple and scalable and could be developed into a range of mode-controlling devices for mode-division-multiplexing applications based on few-mode fibers.

KW - Couplings

KW - Integrated optics devices

KW - multiplexing

KW - Optical fiber couplers

KW - Optical fiber devices

KW - Optical fiber polarization

KW - optical polymer

KW - optical waveguide components

KW - optical waveguide couplers

KW - Polymers

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U2 - 10.1109/JLT.2018.2829143

DO - 10.1109/JLT.2018.2829143

M3 - RGC 21 - Publication in refereed journal

SN - 0733-8724

VL - 36

SP - 2903

EP - 2911

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

IS - 14

ER -

Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers

Abstract

Research Keywords

Publisher's Copyright Statement

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GRF: Thermo-optic Mode Switches Based on Three-dimensional Polymer-waveguide multi-arm Mach-Zehnder Interferometers

Three-Dimensional Optical Waveguide Devices for Broadband Mode-Division Multiplexing

Cite this

Mode Multiplexer with Cascaded Vertical Asymmetric Waveguide Directional Couplers

Abstract

Research Keywords

Publisher's Copyright Statement

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Projects

GRF: Thermo-optic Mode Switches Based on Three-dimensional Polymer-waveguide multi-arm Mach-Zehnder Interferometers

Student theses

Three-Dimensional Optical Waveguide Devices for Broadband Mode-Division Multiplexing

Cite this