Yu Y, Liu X, Li T, Zou X, Ding J, Xu N, Sahng X, Wang X, Huang P, Cheng C, Si S, Lu H, Zhang H, Li D. Optimization of the cavity length and pulse characterization based on germanene as a saturable absorber in an Er-doped fiber laser.
APPLIED OPTICS 2023;
62:9156-9163. [PMID:
38108754 DOI:
10.1364/ao.504880]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/08/2023] [Indexed: 12/19/2023]
Abstract
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 22.64M W/c m 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 19.74 mW. The aforementioned experimental outcomes underscore the significant potential of germanene in the realms of ultrafast photonics and nonlinear optics.
Collapse