Open AccessAll-solid very large mode area ytterbium-doped silica microstructured fiber based on accurate control on cladding index
Author(s) -
Hongping Wei,
Kangkang Chen,
Yong Yang,
Jinyan Li
Publication year - 2016
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.24.008978
Subject(s) - materials science , cladding (metalworking) , plastic clad silica fiber , hard clad silica optical fiber , all silica fiber , photonic crystal fiber , optics , fiber laser , ytterbium , zero dispersion wavelength , optical fiber , fabrication , doping , double clad fiber , laser , refractive index , wavelength , optoelectronics , plastic optical fiber , fiber , composite material , fiber optic sensor , medicine , physics , alternative medicine , pathology
We have demonstrated a new approach for developing very large mode area silica-based microstructured Ytterbium (Yb)-doped fibers. The microstructured region acting as pump cladding around the core is composed by periodically arranged low-index Fluorine-doped silica inclusions with an extremely low filling ratio of 0.088. To the best of our knowledge, we achieved the most accurate controlling on cladding index by 1 × 10 -5 via our passively doped cladding (PDC) method. Two fibers with 127μm and 50μm core diameter respectively were fabricated from the same final preform designed by this approach. It is verified that our 50μm core diameter fiber can maintain robust single mode behavior at 1064nm wavelength. The advantage of an all-solid structure along with a much simpler fabrication process makes our approach very suitable for realizing very large mode area fibers for high power fiber laser application.