Thulium fiber pumped tunable Ho:CaF 2 laser

The paper reports the first room-temperature operation of the in-band pumped Ho:CaF laser. A set of Ho:CaF crystals varying in holmium concentrations (from 0.1 up to 2.5 mol. % of HoF ), synthesized using the Bridgeman technique, was used for lasing and related spectroscopy investigation. A pulsed 1...

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Bibliographic Details
Published in:Optics letters 2017-05, Vol.42 (9), p.1852
Main Authors: Němec, Michal, Šulc, Jan, Jelínek, Michal, Kubeček, Václav, Jelínková, Helena, Doroshenko, Maxim E, Alimov, Olimkhon K, Konyushkin, Vasilii A, Nakladov, Andrei N, Osiko, Vyatcheslav V
Format: Article
Language:English
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Summary:The paper reports the first room-temperature operation of the in-band pumped Ho:CaF laser. A set of Ho:CaF crystals varying in holmium concentrations (from 0.1 up to 2.5 mol. % of HoF ), synthesized using the Bridgeman technique, was used for lasing and related spectroscopy investigation. A pulsed 1.94 μm thulium fiber laser system was used for Ho:CaF longitudinal pumping. For 1.5 mol. % of Ho:CaF , the maximal wavelength tunability (from 2073 to 2114 nm) and output energy (1.6 mJ at 2113 nm) were obtained for absorbed pumping energy 34 mJ. Without the tuning element, the slope efficiency up to 30% in respect to absorbed power was obtained using this sample.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.42.001852