Study on pulse characteristics of high-repetition-rate harmonic mode-locked laser utilizing PbSnS2 saturable absorber
•PbSnS2 is potentially used in ultrafast optics, especially in high-frequency harmonic pulsed fiber lasers.•PbSnS2-SA shows a modulation depth of 11.54 %, highlighting its potential for generating ultrashort pulses.•The erbium-doped (Er-OFS) fiber laser with PbSnS2-SA achieved a fundamental frequenc...
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Veröffentlicht in: | Infrared physics & technology 2024-03, Vol.137, p.105179, Article 105179 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | •PbSnS2 is potentially used in ultrafast optics, especially in high-frequency harmonic pulsed fiber lasers.•PbSnS2-SA shows a modulation depth of 11.54 %, highlighting its potential for generating ultrashort pulses.•The erbium-doped (Er-OFS) fiber laser with PbSnS2-SA achieved a fundamental frequency mode-locking of 738.3 fs.•Both fundamental and harmonic mode-locked operations were obtained in the erbium-doped (Er-110) fiber laser.
This study explores the potential of lead-tin sulfide (PbSnS2), a novel two-dimensional material, for optical applications. PbSnS2 has a narrow bandgap and excellent light absorption, yet research on the optical characterization of PbSnS2 is still in its infancy, especially in applying its saturable adsorption properties to ultrafast photonics. This work focuses on the pulse output characterization of a fiber laser based on the saturable absorber (SA) of PbSnS2. High-quality PbSnS2 nanosheets were prepared using liquid-phase exfoliation. SAs with high damage thresholds were obtained by depositing PbSnS2 nanosheets on microfiber using a laser-induced process and applying them to nonlinear processes in ultrafast photonics. We report mode-locked and harmonic mode-locked generation in both (Er-110)- and (Er-OFS)-doped fiber lasers by using the same PbSnS2 SA. To our knowledge, this is the first report of a PbSnS2-based fiber laser at 1.5-μm band. Our research demonstrates the significant potential and capability of PbSnS2-based saturable absorbers in achieving harmonic pulse operation with a high repetition frequency. This finding further advances the exploratory investigation of optoelectronic devices based on transition metal dichalcogenides. |
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ISSN: | 1350-4495 |
DOI: | 10.1016/j.infrared.2024.105179 |