Open AccessYb‐doped large‐mode‐area aluminosilicate laser fibre fabricated by chelate precursor doping technique
Author(s) -
Peng Kun,
Wang Zhen,
Zhan Huan,
Ni Li,
Gao Cong,
Wang Xiaolong,
Wang Yuying,
Wang Jianjun,
Jing Feng,
Lin Aoxiang
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.3350
Subject(s) - materials science , doping , aluminosilicate , laser , core (optical fiber) , numerical aperture , optics , laser power scaling , ytterbium , aperture (computer memory) , analytical chemistry (journal) , optoelectronics , composite material , chemistry , wavelength , biochemistry , physics , chromatography , acoustics , catalysis
A modified chelate precursor doping technique using high‐purity materials and accurate gas flow control system is proposed to fabricate an efficient ytterbium‐doped large‐mode‐area silica fibre for laser development. This technique enables to make homogeneous large‐core preform with symmetrical shape, relatively low numerical aperture of ∼0.06 and large‐core size of over 4 mm. Homemade preform was drawn into standard fibre for testing and fully characterised by electron probe microanalysis and time‐of‐flight secondary ion mass spectrometry. On the basis of two‐stage master oscillator power amplifier system, 1 kW laser output with slope efficiency of 81.0% was realised at ∼1064 nm.