Open AccessFused silica photonic crystal fiber with heavily germanium doped microinclusion in the core dedicated to couple, guide and control LP02 higher-order mode
Author(s) -
Tomasz Stefaniuk,
Grzegorz Stępniewski,
Dariusz Pysz,
Ryszard Stępień,
Ryszard Buczyński
Publication year - 2018
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.26.021939
Subject(s) - photonic crystal fiber , optics , materials science , germanium , optical fiber , dispersion (optics) , fiber , photonic crystal , core (optical fiber) , zero dispersion wavelength , microstructured optical fiber , single mode optical fiber , doping , mode volume , wavelength , diffraction , optoelectronics , dispersion shifted fiber , silicon , fiber optic sensor , physics , composite material
We report on modeling, development, and optical characterization of fused silica photonic crystal fiber with germanium doped microinclusion placed in the middle of the core. The fiber is designed to efficiently couple and guide LP 02 mode. It offers high optical density in the center region, large mode separation, low losses, and small dispersion with relatively flat profile for both LP 01 and LP 02 modes in 1-1.6 µm wavelength range. We demonstrate that by changing geometrical and material parameters of the inclusion partially independent tuning of propagation constants of individual modes is possible, what might be found is a variety of potential applications, e.g., in nonlinear optics. We also show that diffraction-limited propagation of LP 02 mode in free space can be exploited in microscopy or lab-on-a-chip systems, where the proposed fiber can be used for light delivery.