Open AccessMid-infrared supercontinuum generation spanning 18 octaves using step-index indium fluoride fiber pumped by a femtosecond fiber laser near 2 µm
Author(s) -
Reza Salem,
Zhuo Jiang,
Dongfeng Liu,
R. Pafchek,
David L. Gardner,
Paul Foy,
Mohammed Saad,
D.W. Jenkins,
Alex Cable,
Peter Fendel
Publication year - 2015
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.23.030592
Subject(s) - supercontinuum , optics , materials science , femtosecond , fiber laser , laser , octave (electronics) , optoelectronics , optical fiber , photonic crystal fiber , physics
A nearly two-octave wide coherent mid-infrared supercontinuum is demonstrated in a dispersion-engineered step-index indium fluoride fiber pumped near 2 µm. The pump source is an all-fiber femtosecond laser with 100 fs pulse width, 570 mW average power and 50 MHz repetition rate. The supercontinuum spectrum spans from 1.25 µm to 4.6 µm. Numerical modelling of the supercontinuum spectra show good agreement with the measurements. The coherence of the supercontinuum is calculated using a numerical model and shows a high degree of coherence across the generated bandwidth allowing it to be used for frequency comb applications.