Open AccessDesign of zigzag folded inversion-stacked AlGaAs waveguides for ultra-compact wavelength converters
Author(s) -
Tomonori Matsushita,
Yuki Nakamura,
Takashi Kondo
Publication year - 2017
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.25.022829
Subject(s) - zigzag , optics , materials science , wavelength , second harmonic generation , phase matching , energy conversion efficiency , optoelectronics , bandwidth (computing) , quasi phase matching , waveguide , physics , telecommunications , computer science , laser , mathematics , geometry
We have proposed and designed zigzag-folded U-shaped waveguides to realize highly efficient wavelength conversion with an extremely small footprint. Extreme high efficiencies are achieved with a combination of modal phase matching and 4¯ quasi phase matching in inversion-stacked AlGaAs/Alox waveguides. Numerical simulations reveal that the conversion efficiency of second harmonic generation pumped at 1.55 μm as high as 12000 %W -1 can be achieved in an 8.0-mm-long AlGaAs/Alox waveguide that is folded up into a small domain of 0.8×0.6 mm 2 area. A phase matching signal bandwidth of difference frequency generation, 29 nm, covers 83 % of the telecommunication C band.