100 kW peak power external cavity diamond Raman laser at 2.52 μm

Demetriou, Giorgos and Kemp, Alan J. and Savitski, Vasili (2019) 100 kW peak power external cavity diamond Raman laser at 2.52 μm. Optics Express, 27 (7). pp. 10296-10303. ISSN 1094-4087

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    Abstract

    We report an external cavity diamond Raman laser operating at 2.52 μm, pumped by a 1.89 μm Tm:LiYF4 (YLF) laser. The maximum pulse energy at 2.52 μm is 1.67 mJ for 4.4 mJ of pump, yielding a conversion efficiency of 38 %. The best slope efficiency is ~60% and the Raman pulse duration is between 11 and 15 ns for ~33 ns pump pulse duration. The peak power at 2.52 μm is >100 kW. This demonstration of a Thulium laser pumped diamond Raman laser paves the way for accessing the industrially important wavelength region of ~2.5 μm.