Open AccessDesign of a Bragg fiber with large mode area for mid-infrared applications
Author(s) -
Somnath Ghosh,
Sonali Dasgupta,
R. K. Varshney,
David J. Richardson,
Bishnu P. Pal
Publication year - 2011
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.19.021295
Subject(s) - optics , supercontinuum , materials science , multi mode optical fiber , single mode optical fiber , fiber laser , fiber bragg grating , photonic crystal fiber , fiber , dispersion shifted fiber , dispersion (optics) , mode volume , optical fiber , optoelectronics , wavelength , plastic optical fiber , fiber optic sensor , physics , composite material
The design of an all-solid, soft glass-based, large mode area Bragg fiber for effective single mode operation with mode effective area exceeding 1100 µm(2) across the wavelength range of 2-4 μm is reported. The design adopts a new strategy to induce large differential loss between the fundamental and higher order modes for effective single-mode operation within few tens of centimetres length of an otherwise multimode fiber. In addition to having the potential for the targeted application in high power laser delivery systems; complemented by a zero dispersion wavelength at 2.04 µm and rapidly developing mid-IR optical sources, the proposed fiber should also be attractive for generation of high power, single mode and less divergent supercontinuum light over this mid-IR window.