AQ-switched erbium-doped fiber laser with a graphene saturable absorber

Abstract

We demonstrate a simple, compact and low cost Q-switched erbium-doped fiber laser (EDFL) exploiting a graphene saturable absorber (GSA) for possible applications in metrology, sensing and medical diagnostics. The EDFL operates at 1560 nm with repetition rates of 31.3 kHz and 25 kHz with GSA1 and GSA2, respectively, at pump power of 120 mW. The repetition rate is smaller with a lower pump power. It has a pulse width of 7.5 µs and pulse energy of 43.7 nJ with GSA2 at 120 mW pump power. It is also observed that a thicker layer of graphene produces a Q-switched fiber laser with a lower pump threshold and a higher output energy, but smaller repetition rate and pulse width.

Q-switching of a thulium-doped fibre laser using a holmium-doped fibre saturable absorber

“…those based on graphene layers. A typical pulse duration in such fibre lasers is several microseconds, and the output pulse energy is tens of nanojoules [12]. Therefore, the proposed configuration compares well to widespread Q-switching techniques.…”

Q-switched double-clad Ytterbium-doped fiber laser using MoS2flakes saturable absorber

“…Therefore, high motivation to find for better SA materials arises which lead to discovery of semiconductor nanocrystal quantum dots (QDs) zero-dimensional material (0D) in 1997 [3], followed by the invention of carbon nanotube (CNTs); one-dimensional material (1D) [4,5,6]. Later, graphene [7], a two-dimensional (2D) material sparked a new era of 2D SA for its zero bandgap, that essential for wide operational broadband. Discovery of topological insulators (TIs) [8], transition metal dichalcogenides (TMDs) and black phosphorus (BP) [9,10] several layers combination form strong van der Waals heterostructures [11].…”

Eye-diagram and Q factor evaluation of fiber ring laser in lightwave transmission

“…Erbium doped fiber laser (EDFL) in C + L band have attracted great interest owing to their wide application, such as spectroscopy, sensing and optical coherence tomography [1][2][3]. EDFL also can be used in third harmonic generation (THG) green light generation, if lasing power is large enough [4,5].…”