We report a comprehensive characterization of tunable continuous-wave (CW) and passive Q-switching laser performance of Dy-doped zirconium fluoride fiber emitting around 3 mu m. The in-band pumped CW laser operation is investigated for pump wavelengths varying from 2.7 mu m to 2.825 mu m, for fiber lengths ranging from 0.4 m to 2 m, and for output coupling efficiency from 10% to 50%, leading to a maximum laser slope efficiency of 44% and a tuning range larger than 300 nm. With Findlay-Clay analysis and Rigrod analyses, optimal cavity parameters are retrieved, paving the way for further optimizations in performance. The passively Q-switched laser operation of Dy-doped fluoride fiber is achieved employing a semiconductor saturable absorber mirror for the first time, demonstrating a stable operation with a minimum pulse duration of 580 ns, a highest repetition frequency of 103 kHz and a pulse energy up to 300 nJ.

Mid-IR tunable CW and passively Q-switched laser operation of Dy-doped fluoride fiber

Yuchen Wang;Pinghua Tang;Nicola Coluccelli;Paolo Laporta;Gianluca Galzerano
2022-01-01

Abstract

We report a comprehensive characterization of tunable continuous-wave (CW) and passive Q-switching laser performance of Dy-doped zirconium fluoride fiber emitting around 3 mu m. The in-band pumped CW laser operation is investigated for pump wavelengths varying from 2.7 mu m to 2.825 mu m, for fiber lengths ranging from 0.4 m to 2 m, and for output coupling efficiency from 10% to 50%, leading to a maximum laser slope efficiency of 44% and a tuning range larger than 300 nm. With Findlay-Clay analysis and Rigrod analyses, optimal cavity parameters are retrieved, paving the way for further optimizations in performance. The passively Q-switched laser operation of Dy-doped fluoride fiber is achieved employing a semiconductor saturable absorber mirror for the first time, demonstrating a stable operation with a minimum pulse duration of 580 ns, a highest repetition frequency of 103 kHz and a pulse energy up to 300 nJ.
2022
mid-infrared lasers
fiber lasers
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1227485
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