Open AccessFemtosecond all-polarization-maintaining Nd fiber laser at 920 nm mode locked by a biased NALM
Author(s) -
Siying Wang,
Yijun Li,
Yanchuan Chen,
Yuqian Gao,
Zhigang Zhang,
Aimin Wang
Publication year - 2021
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.434767
Subject(s) - optics , femtosecond , materials science , laser , fiber laser , polarization (electrochemistry) , polarization maintaining optical fiber , femtosecond pulse shaping , optical fiber , optoelectronics , physics , fiber optic sensor , chemistry
We demonstrate a femtosecond all-polarization-maintaining Nd fiber laser working at 920 nm mode locked by a biased non-linear loop mirror. The broadest spectral width of the pulse is 25.2 nm and the output power is 8 mW with 320 mW pump power. The measured pulse width is 109 fs with extra-cavity compression. The laser configuration of all-polarization-maintaining fiber can directly enhance the environmental stability of generated pulses. The seed pulses of the oscillator were amplified over 400 mW, which served as the light source for a two-photon microscope. To the best of our knowledge, this is the first demonstration of a 920 nm femtosecond Nd polarization-maintaining fiber laser based on a non-linear loop mirror.