O-band mode-locked praseodymium-doped fluoride fiber laser using nickel phosphorus trisulfide

• Published in: Optics and laser technology 2023-05, Vol.160, p.109090, Article 109090
• Main Authors: Ahmad, H., Nizamani, B., Azam, A.D., Samion, M.Z., Yasin, M., Sun, S.
• Format: Article
• Language: English
• Subjects: Fiber laser; Fluoride fiber; Mode-locking; O-band; Saturable absorber
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2022.109090

•Generation of mode-locked pulses using an all-fiber setup in the O-band region.•The mode-locked laser had a center wavelength of 1302.3 nm.•Performance of NiPS3 as a saturable absorber was investigated.•Ultrashort pulse width of 370 fs was obtained with a peak power of 46.2 kW. In this work, we demonstrated a mode-locked fiber laser operating in the O-band region using nickel phosphorus trisulfide (NiPS3) as a saturable absorber (SA) for the first time. An arc-shaped fiber was coated with a layer of NiPS3 to serve as the SA which was then integrated into a praseodymium (Pr3+)-doped fluoride fiber laser (PDFFL) cavity for signal emission at 1.3 µm. The mode-locked laser operates at a center wavelength of 1302.3 nm, around the zero-dispersion wavelength. The mode-locked PDFFL has a repetition rate and signal-to-noise ratio (SNR) of 0.403 MHz and 55 dB, respectively. Ultrashort pulses of 370 fs were generated using the NiPS3-SA with a pulse energy of 17.1 nJ and a peak power of 46.2 kW. The NiPS3-SA in our work has shown the potential of this 2D nanomaterial ability to generate mode-locked pulses at 1.3 µm, which was rarely explored.