4.6 Article

Optimization process of spin-coated black phosphorus/ polydimethylsiloxane composite on microfiber as saturable absorber for ultrafast photonics

Journal

INFRARED PHYSICS & TECHNOLOGY
Volume 130, Issue -, Pages -

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ELSEVIER
DOI: 10.1016/j.infrared.2023.104578

Keywords

Black phosphorus; Saturable absorber; Ultrashort pulse; Fiber laser

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This paper focuses on the design and fabrication method of black phosphorus/polydimethylsiloxane composite microfiber-based saturable absorber (SA) for ultrashort pulse generation. The integration of the SA in an erbium-doped fiber laser exhibited a pulse duration of 724 fs. This work provides a guideline for the design of microfiber-based SA using spin-coating technique to maximize its laser performances.
Numerous saturable absorber (SA) fabrication methods have been proposed and employed in the development of ultrafast laser systems, particularly for microfiber-based SAs decorated with various 2D materials. However, the study on microfiber-SA with different transition lengths is still inadequate. This paper focuses on the design and fabrication method of black phosphorus/polydimethylsiloxane composite microfiber-based SA for ultrashort pulse generation. With optimized microfiber-SA dimensions of 30 mm (up/down taper), 1 mm (waist length) and 10 mu m (waist diameter), black phosphorus/polydimethylsiloxane composite was spin-coated on the microfiber at 4000 rpm for 6 min. The integration of the microfiber-SA in an erbium-doped fiber laser exhibited pulse duration of 724 fs at center wavelength of 1560.18 nm. This work provides a guideline for the design of microfiber-based SA using spin-coating technique to maximize its laser performances.

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