Open AccessEchelle grating based mode demultipexer for vertical mode-division multiplexing
Author(s) -
Jun Chen,
Yang Yang,
Ning Zhu
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.024509
Subject(s) - optics , grating , multi mode optical fiber , demultiplexer , wavelength division multiplexing , physics , multiplexing , waveguide , optical add drop multiplexer , modal , blazed grating , crosstalk , diffraction grating , wavelength , optical fiber , materials science , computer science , telecommunications , optical performance monitoring , multiplexer , polymer chemistry
We have proposed a mode multi/demultiplexer based on the echelle grating suitable for vertical multimode bus waveguide. Compared with the lateral multimode waveguide, the vertical scheme has much smaller bending radius which leads to compact system size. The guided modes in the multimode waveguide are able to be separated simultaneously by the echelle grating since they experiences different propagation constants in the free propagation region. Due to the high performance of the grating itself, the theoretical modal crosstalk can be as low as around -40dB. Moreover, we demonstrate the possibility to integrate WDM together with MDM by using only one echelle grating, which is favorable in real applications considering the compact system setup and simple design rules.