Open AccessSilicon mode multi/demultiplexer based on multimode grating-assisted couplers
Author(s) -
Huiye Qiu,
Ting Hu,
Guannan Jiang,
Haifeng Shao,
Ping Yu,
Jianyi Yang,
Xiaoqing Jiang
Publication year - 2013
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.21.017904
Subject(s) - optics , grating , multiplexer , demultiplexer , insertion loss , materials science , power dividers and directional couplers , multi mode optical fiber , multiplexing , coupling (piping) , phase matching , diffraction grating , coupled mode theory , waveguide , optoelectronics , physics , refractive index , optical fiber , telecommunications , computer science , laser , metallurgy
A simple and low-crosstalk 1 × 4 silicon mode (de)multiplexer based on multimode grating-assisted-couplers is proposed. Mode transitions can be flexibly controlled by designing the grating period at the phase-matching condition. Due to the contra-directional coupling, precise control of the coupling strength and the coupling length are not needed in the system. Calculation results show that the insertion loss and the 3 dB bandwidths of the device are 0.2 dB and 3.7 nm, 0.34 dB and 7.6 nm, and 0.21 dB and 11.8 nm for the channels which (de)multiplex to the 1st, 2nd, and 3rd modes of the bus waveguide, respectively.