Tm fiber laser in-band pumped Ho:YLF/SrWO4 intracavity mid-infrared Raman laser at 2550 nm

Abstract

We first report on the 2550 nm mid-infrared acousto-optic Q-switched Ho:YLF/SrWO₄ intracavity Raman laser in-band pumped by a 1940 nm Tm fiber laser. The output performances of Ho:YLF/SrWO₄ Raman laser were investigated at several different pulse repetition frequencies. Based on the stimulated Raman scattering effect, the 2065 nm fundamental laser was converted to the 2550 nm Raman laser. At the pulse repetition frequency of 4 kHz, the maximum average output power of 900 mW was achieved with a pulse width of 17.07 ns. The corresponding single pulse energy and peak power were 225 μJ and 13.18 kW, respectively.