Abstract
Abstract We report on a Q-switched Yb-doped all-fiber laser based on a solution-processed Ag nanoplates saturable absorber. Optical deposition procedure is implemented to transfer the Ag nanoplates onto the fiber core area through the thermal effect. The saturable absorber is sandwiched between two fiber connectors, providing simplicity, flexibility, and easy integration into the laser oscillator. The modulation depth and saturation incident fluence are measured to be ~5.8% and ~106.36 μJ/cm2 at 1-μm region, respectively. Self-started stable Q-switched operation is achieved for a threshold pump power of 180 mW. The repetition rates of the pulse trains range from 66.6 to 184.8 kHz when the pump power scales from 210 to 600 mW. The maximum average output power is 10.77 mW, corresponding to the single-pulse energy of 58.3 nJ and minimum pulse duration of ~1.01 μs. To the best of our knowledge, it is the first time that the Ag nanoplates saturable absorbers are utilized in the 1-μm Yb-doped Q-switched fiber laser.
Highlights
Q-switched laser sources have attracted considerable attention during the past decades due to the versatile applications in widespread industry and scientific research areas, such as laser materials processing, remote sensing, range finding, medicine, telecommunications, and nonlinear optics [1,2,3,4,5]
We report on a Q-switched Yb-doped all-fiber laser based on a solution-processed Ag nanoplates saturable absorber
Numerous nanomaterials have been demonstrated as efficient saturable absorption materials for saturable absorbers (SAs) in Q-switched fiber lasers, such as carbon nanotubes [8,9,10], graphene [11,12,13,14], transition-metal dichalcogenides [15,16,17,18], topological insulators [19,20,21], black phosphorus
Summary
Q-switched laser sources have attracted considerable attention during the past decades due to the versatile applications in widespread industry and scientific research areas, such as laser materials processing, remote sensing, range finding, medicine, telecommunications, and nonlinear optics [1,2,3,4,5]. It is worthy to note that metal nanoparticles have exhibited great potential in the application of ultrafast fiber lasers as SAs for Q-switched and mode-locked pulse generation [42,43,44,45,46,47,48,49,50]. The Ag nanoparticles possess the properties of the highest electrical and thermal conductivities among metal materials, as well as large and ultrafast third-order optical nonlinearities [34, 35, 41], indicating the high potential as SAs in pulsed fiber lasers. Such solution shows a broad plasmon resonance in the 1100–1200 nm region and nanoplate size around 150 nm.
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