Optimization of the cavity length and pulse characterization based on germanene as a saturable absorber in an Er-doped fiber laser
APPLIED OPTICS(2023)
摘要
In this study, germanene-nanosheets (NSs) were synthesized by liquid-phase exfoliation, followed by an experimental investigation into the nonlinear saturable absorption characteristics and morphological structure of germanene. The germanene-NSs were employed as saturable absorbers, exhibiting saturation intensity and modulation depth values of 22.64MW=cm(2) and 4.48%, respectively. This demonstrated the feasibility of utilizing germanene-NSs passively mode-locked in an erbium-doped fiber laser (EDFL). By optimizing the cavity length, improvements in the output of EDFL characteristics were achieved, resulting in 883 fs pulses with a maximum average output power of 19.74mW. The aforementioned experimental outcomes underscore the significant potential of germanene in the realms of ultrafast photonics and nonlinear optics. (c) 2023 Optica Publishing Group
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关键词
saturable absorber,germanene,laser,pulse characterization,cavity length,er-doped
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