Three-dimensional mode multiplexer based on adiabatic-tapered waveguides forming vertical directional couplers over C + L band and beyond.
Opt Lett
; 48(4): 1044-1047, 2023 Feb 15.
Article
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| MEDLINE
| ID: mdl-36791006
ABSTRACT
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 E11, E21, and E12 modes from the few-mode bus waveguide. Our experimental device shows a coupling ratio higher than 98.6% and 97.0% for the E21 and E12 modes, respectively, over the C + L band and beyond. The modal cross talk of this device can be lower than -17.1â
dB, -18.4â
dB, and -15.1â
dB caused by the unintended E11, E21, and E12 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.
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Colección:
01-internacional
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MEDLINE
Idioma:
En
Revista:
Opt Lett
Año:
2023
Tipo del documento:
Article