Diode pumped dysprosium fiber laser

Matthew R. Majewski; Md Ziaul Amin; Thibaud Berthelot; Stuart D. Jackson

doi:10.1117/12.2545474

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21 February 2020 Diode pumped dysprosium fiber laser

Matthew R. Majewski, Md Ziaul Amin, Thibaud Berthelot, Stuart D. Jackson

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Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 112601P (2020) https://doi.org/10.1117/12.2545474
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

We present preliminary results relating to laser emission at 3:16 µm from a Dy fiber laser that is diode pumped at 800 nm. To allow strong diode pump absorption and to capture improved quantum efficiencies resulting from cross relaxation, the Dy:ZBLAN fiber was co-doped with Tm ions in a 10 to 1 concentration ratio to Dy. A resonant energy transfer from Tm to Dy provides an inversion on the ⁶H_13/2 to ⁶H_15/2 transition. Maximum output power of 5.5 mW at a slope efficiency of 1.3 % was produced from a highly non-optimal arrangement. System performance is bench marked against well established resonant pumping of the Dy upper state. Measurement of fluorescence lifetimes of both dopants allows for qualitative assessment of the energy transfer efficiency. A potentially detrimental energy transfer mechanism is identified and discussed.

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Matthew R. Majewski, Md Ziaul Amin, Thibaud Berthelot, and Stuart D. Jackson "Diode pumped dysprosium fiber laser", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 112601P (21 February 2020); https://doi.org/10.1117/12.2545474

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