Open AccessCompact filters and demultiplexers based on long-range air-hole assisted subwavelength waveguides
Author(s) -
Wen Zhou,
Xu Huang
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.028456
Subject(s) - demultiplexer , extinction ratio , optics , bandwidth (computing) , optical filter , multiplexing , wavelength , wavelength division multiplexing , materials science , waveguide , photonics , optoelectronics , physics , computer science , telecommunications , multiplexer
Compact filters and demultiplexers based on long-range air-hole assisted subwavelength (LR-AHAS) waveguides have been proposed and numerically demonstrated. The tunable reflective filters possess the characters of high extinction ratio (17.5dB) and narrow bandwidth (10.1nm). The average demultiplexing bandwidth of a 1 × 3 wavelength demultiplexer based on LR-AHAS waveguide is 17.3 nm. The drop efficiencies can be significantly enhanced up to 60% by employing proposed filters in the structure. With distinguished wavelength-filtering/dropping characters and compact footprints, the proposed filters and demultiplexers could become the fundamental signal processing components in the LR-AHAS waveguides for large-scale photonic integrations.