Wavelength tunable Q-switched Er-doped fiber laser based on ZrSe2

• Published in: Optics and laser technology 2022-03, Vol.147, p.107598, Article 107598
• Main Authors: Peng, Hsin-Ju, Li, Zhen-Ying, Tsay, Shwu-Yun, Song, Yu-Feng, Zhang, Han, Lin, Ja-Hon
• Format: Article
• Language: English
• Subjects: 2D material; Doped fibers; Fiber lasers; Invisible filter; Laser applications; Liquid phases; Passively Q-switched fiber laser; Platelets; Polarizers; Q switched lasers; Tunable lasers; Tuning; Wavelength tunable; Zirconium diselenide
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2021.107598

•Passively Q-switched Er-doped fiber laser (PQ EDFL) based on the ZrSe2/PVA film.•Modulation depth and saturation intensity of ZrSe2/PVA SA about 31% and 4.75 MW/cm2.•Wavelength tunable PQ EDFL from 1544.3 to 1563.5 nm by means of invisible filter. We demonstrated a passively Q-switched Er-doped fiber laser based on the ZrSe2/PVA film. Here, the layer structure ZrSe2 platelets were produced by the liquid-phase exfoliation method. By means of nonlinear optical transmittance measurement, the modulation depth and saturation intensity of the ZrSe2/PVA SA were 31% and 4.75 MW/cm2, respectively. The Q-switched pulses revealed the highest repetition rate and pulse energy around 43.7 kHz and 139.8 nJ with the pump power at 346 mW. Based on the invisible filter, we produced the wavelength-tunable and dual-wavelength Q-switched pulses after insertion of the in-line polarizer inside the cavity. Through the proper adjustment of the polarization controller, a tuning wavelength of from 1544.3 to 1563.5 nm, a tuning range of around 19.2 nm, and the smallest tuning interval of around 1 nm have been achieved.