Abstract
An erbium-doped hybrid passively mode-locked fiber laser based on few-layer graphdiyne (GDY) saturable absorber (SA) has been investigated for the first time. Hybrid mode-locked fiber laser is composed of nonlinear polarization rotation (NPR) technology and GDY-SA. The central wavelength, pulse width and repetition rate of the output pulse are 1530.7 nm, 690.2 fs and 14.7 MHz, respectively. Compared with the passively mode-locked pulse laser with GDY-SA or NPR technology alone, the output pulse width of hybrid passively mode-locked fiber laser is reduced more than 50 fs. It is demonstrated that the performance of GDY can be potentially applied in ultrafast laser.
Highlights
Ultra-short pulse mode-locked fiber laser has been extensively investigated due to its applications in laser physics, material science, nanotechnology and biomedicine, etc
Based on the previous work, a hybrid mode-locked erbiumdoped fiber laser is fabricated by using non-linear polarization rotation (NPR) technology and GDY-saturable absorber (SA) prepared by spin-coating method
Mode-locked erbium-doped fiber laser based on NPR, as shown in Figure 2, is mainly composed of the lasing diode (LD) with the output wavelength of 976 nm, wavelength division multiplexing (WDM), single-mode fiber (SMF), erbium-doped fiber (EDF), polarization controller (PC), polarization dependent isolator (PD-ISO), and optical coupler (OC)
Summary
Ultra-short pulse mode-locked fiber laser has been extensively investigated due to its applications in laser physics, material science, nanotechnology and biomedicine, etc. More and more two-dimensional (2D) materials with outstanding optical properties have been applied in the field of lasers [14–18] These materials are significantly characterized by adjustable non-linear absorption coefficient, short relaxation time and recovery time, and low optical loss [19–21]. These materials have been widely used in ultrafast photonics to obtain high power and broadband spectrum mode-locked pulse sources [22–38], such as semiconductor saturable absorption mirror (SESAM), single-walled carbon nanotube (SWCNT), graphene, graphene oxide, topological insulators (TI), black phosphorus (BP), bismuthine, WS2, etc. Based on the previous work, a hybrid mode-locked erbiumdoped fiber laser is fabricated by using NPR technology and GDY-SA prepared by spin-coating method. Combined with the high stability characteristics of GDY itself, it can be proved that GDY-SA in this experiment has good stability and can withstand long-time illumination without change
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