학술논문
Two types of ultrafast mode-locking operations from an Er-doped fiber laser based on germanene nanosheets
Document Type
article
Author
Source
Frontiers of Optoelectronics, Vol 16, Iss 1, Pp 1-10 (2023)
Subject
Language
English
ISSN
2095-2767
Abstract
Abstract As a member of Xenes family, germanene has excellent nonlinear saturable absorption characteristics. In this work, we prepared germanene nanosheets by liquid phase exfoliation and measured their saturation intensity as 0.6 GW/cm2 with a modulation depth of 8%. Then, conventional solitons with a pulse width of 946 fs and high-energy noise-like pulses with a pulse width of 784 fs were obtained by using germanene nanosheet as a saturable absorber for a mode-locked Erbium-doped fiber laser. The characteristics of the two types of pulses were investigated experimentally. The results reveal that germanene has great potential for modulation devices in ultrafast lasers and can be used as a material for creation of excellent nonlinear optical devices to explore richer applications in ultrafast photonics. Graphical Abstract