Continuous tuning of pulse parameters in a soliton fiber laser by adjusting the effect of nonlinear polarization rotation.
Opt Lett
; 49(3): 674-677, 2024 Feb 01.
Article
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| MEDLINE
| ID: mdl-38300087
ABSTRACT
We demonstrate that through inserting a short length of highly birefringent small-core photonic crystal fiber (Hi-Bi SC-PCF) into a soliton fiber laser, the nonlinear polarization rotation effect in this laser can be manipulated, leading to continuous tuning of the output pulse parameters. In experiments, we observed that by adjusting the polarization state of light launched into the Hi-Bi SC-PCF and varying the cavity attenuation, the laser spectral width can be continuously tuned from â¼7.1 to â¼1.7â
nm, corresponding to a pulse-width-tuning range from â¼350â
fs to â¼1.56â
ps. During the parameter tuning, the output pulses strictly follow the soliton area theory, giving an almost constant time-bandwidth-product of â¼0.31. This soliton fiber laser, being capable of continuous parameter tuning, could be applied as the seed source in ultrafast laser systems and may find some applications in nonlinear-optics and soliton-dynamics experiments.
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Opt Lett
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2024
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Article