Three-dimensional mode multiplexer based on adiabatic-tapered waveguides forming vertical directional couplers over C + L band and beyond

Three-dimensional mode multiplexer based on adiabatic-tapered waveguides forming vertical directional couplers over C + L band and beyond

We present a mode multiplexer based on vertical directional couplers that are formed by adiabatic-tapered waveguides. We design and fabricate the device via the micro-fabrication processing to (de)multiplex the E , E , and E modes from the few-mode bus waveguide. Our experimental device shows a coup...

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Veröffentlicht in:Optics letters 2023-02, Vol.48 (4), p.1044-1047
Hauptverfasser: Huang, Quandong, Zhang, Jiali, Zhong, Lixi, Zheng, Zhaoqiang, Li, Jianping, Xu, Ou
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Sprache:eng
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Adiabatic flow
C band
Crosstalk
Directional couplers
Multiplexers
Multiplexing
Waveguides
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container_end_page 1047
container_issue 4
container_start_page 1044
container_title Optics letters
container_volume 48
creator Huang, Quandong
Zhang, Jiali
Zhong, Lixi
Zheng, Zhaoqiang
Li, Jianping
Xu, Ou
description We present a mode multiplexer based on vertical directional couplers that are formed by adiabatic-tapered waveguides. We design and fabricate the device via the micro-fabrication processing to (de)multiplex the E , E , and E modes from the few-mode bus waveguide. Our experimental device shows a coupling ratio higher than 98.6% and 97.0% for the E and E modes, respectively, over the C + L band and beyond. The modal cross talk of this device can be lower than -17.1 dB, -18.4 dB, and -15.1 dB caused by the unintended E , E , and E modes, respectively. This mode multiplexer can work over a broader wavelength range with weak polarization sensitivity, which could be used in the mode-division-multiplexing systems where mode (de)multiplexing is required in the expanded communication wavelength window other than the C-band.
doi_str_mv 10.1364/OL.480129
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source Optica Publishing Group Journals
subjects Adiabatic flow
C band
Crosstalk
Directional couplers
Multiplexers
Multiplexing
Waveguides
title Three-dimensional mode multiplexer based on adiabatic-tapered waveguides forming vertical directional couplers over C + L band and beyond
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