Kvantovaya Elektronika, 2022 Volume 52, Number 11,Pages 975–978(Mi qe18183)
Selection of papers presented at the International Workshop on Fibre Lasers (Novosibirsk, 15-19 August 2022) (Compiled and edited by S.L. Semjonov and S.A. Babin)
Study of the influence of interaction of spectral filtering and slow saturable absorption on the formation of ultrashort pulses in fibre lasers
Abstract:
We study the formation of ultrashort pulses in a fibre laser cavity with a slow saturable absorber and a spectral filter. It is found that in a cavity with total normal chromatic dispersion, the finite relaxation time of a saturable absorber leads to a spectral shift of the generated pulses relative to the centre wavelength of the spectral filter. The numerical results are verified using two experimental laser sources: a ring fibre laser with a saturable semiconductor mirror and a fibre laser with a nonlinear amplifying loop mirror. The obtained results can be used to design ultrashort-pulse laser sources in applications for which the spectral properties of radiation are of key importance.