Journal
OPTICAL MATERIALS EXPRESS
Volume 12, Issue 4, Pages 1502-1511Publisher
Optica Publishing Group
DOI: 10.1364/OME.453046
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Funding
- Extreme Light Infrastructure Nuclear Physics
- Ministero dell'Istruzione, dell'Universita e della Ricerca
- China Scholarship Council [202008430040]
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This study comprehensively characterizes the tunable continuous-wave and passive Q-switching laser performance of Dy-doped zirconium fluoride fiber emitting at around 3 μm. The optimal pump wavelengths, fiber lengths, output coupling efficiencies, and cavity parameters are determined, leading to high laser slope efficiency and a wide tuning range. Passively Q-switched laser operation is achieved using a semiconductor saturable absorber mirror, demonstrating stable operation and high pulse energy.
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.
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