AI Article Synopsis
- Researchers created a heterostructure using WS and MoS films stacked on a fiber tip, developing a saturable absorber with integrated features.
- This new design showcased impressive nonlinear properties, like a high modulation depth and low saturable intensity, resulting in stable ultrafast laser pulses at a wavelength of 1.55 μm.
- The findings suggest that stacking different transition-metal dichalcogenides or altering layer thickness can enhance nonlinear optical characteristics, aiding the development of advanced photonic devices.
Article Abstract
In this Letter, high-quality WS film and MoS film were vertically stacked on the tip of a single-mode fiber in turns to form heterostructure (WS-MoS-WS)-based saturable absorbers with all-fiber integrated features. Their nonlinear saturable absorption properties were remarkable, such as a large modulation depth (∼16.99%) and a small saturable intensity (6.23 MW·cm). Stable pulses at 1.55 μm with duration as short as 296 fs and average power as high as 25 mW were obtained in an erbium-doped fiber laser system. The results demonstrate that the proposed heterostructures own remarkable nonlinear optical properties and offer a platform for adjusting nonlinear optical properties by stacking different transition-metal dichalcogenides or modifying the thickness of each layer, paving the way for engineering functional ultrafast photonics devices with desirable properties.
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| http://dx.doi.org/10.1364/OL.42.004279 | DOI Listing |
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