Open AccessPolarized all-normal dispersion supercontinuum reaching 25 µm generated in a birefringent microstructured silica fiber
Author(s) -
Karol Tarnowski,
Tadeusz Martynkien,
Paweł Mergo,
Krzysztof Poturaj,
Alicja Anuszkiewicz,
Pierre Béjot,
F. Billard,
O. Faucher,
Bertrand Kibler,
Wacław Urbańczyk
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.25.027452
Subject(s) - supercontinuum , optics , birefringence , materials science , zero dispersion wavelength , dispersion (optics) , photonic crystal fiber , wavelength , polarization (electrochemistry) , dispersion shifted fiber , optical fiber , physics , fiber optic sensor , chemistry
We demonstrate a polarized all-normal dispersion supercontinuum generated in a birefringent silica microstructured fiber spanning beyond 2.5 µm. To our knowledge, this is the spectra reaching the furthest in mid-infrared ever generated in normal dispersion silica fibers. The generation process was studied experimentally and numerically with 70 fs pump pulses operating at different wavelengths on short propagation distances of 48 mm and 122 mm. The all-normal operation was limited by the zero-dispersion wavelength at 2.56 µm and spectral broadening was stopped by OH absorption peak at 2.72 µm. We identified the asymmetry between propagation in both polarization axes and showed that pumping along a slow fiber axis is beneficial for a higher degree of polarization. Numerical simulations of the generation process conducted by solving the generalized nonlinear Schrödinger equation (NLSE) and coupled NLSEs system showed good agreement with experimental spectra.