Open AccessPassively Q-switched fiber laser with various phases of Ni-S as a saturable absorber
Author(s) -
П. И. Кузнецов,
Evgeny Savelyev,
Dmitriy P. Sudas,
G. G. Yakushcheva
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1851/1/012018
Subject(s) - materials science , saturable absorption , fiber laser , polydimethylsiloxane , laser , amorphous solid , q switching , nanoparticle , polymer , annealing (glass) , microfiber , optics , fiber , optoelectronics , composite material , nanotechnology , chemistry , physics , organic chemistry
Nanoparticles of NiS (amorphous α and crystalline β phases), Ni 3 S 2 and Ni were obtained by passing H 2 S through a solution of NiSO 4 •7H 2 O followed by drying or annealing of washed precipitate in hydrogen or nitrogen atmospheres. The synthesized materials were mixed with a polymer (polydimethylsiloxane elastomer) and applied to the surface of chemically prepared conical constrictions on SMF-28 fiber. Passive Q-switches were integrated into a specially designed erbium ring fiber laser and tested. For the first time, the generation of µs pulses was realized using these compositions of the binary system Ni-S. The best parameters of a pulsed laser obtained using β-NiS nanoparticles as a saturable absorber were a repetition rate of 21.7 kHz, an average output power of 26.72 mW, and a pulse energy of 1230 nJ.