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Experimental analysis of emission linewidth narrowing in a pulsed KGd(WO4)2 Raman laser

Savitski, Vasili G. (2014) Experimental analysis of emission linewidth narrowing in a pulsed KGd(WO4)2 Raman laser. Optics Express, 22 (18). pp. 21767-21774. ISSN 1094-4087

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The linewidth of a KGd(WO<sub>4</sub>)<sub>2</sub> (KGW) intracavity pumped Raman laser is analyzed experimentally for different configurations of the Raman and pump laser resonators: with narrow and broadband pump emission profiles, with and without linewidth narrowing elements in the Raman laser resonator, with and without injection seeding into the Raman cavity. The benefits of a narrow linewidth pump source in combination with linewidth narrowing elements in the Raman laser cavity for the efficient linewidth narrowing of the Raman laser emission are explained. 20 kW peak-power pulses at 1156 nm with 0.43 cm<sup>-1</sup> emission linewidth are demonstrated from an injection seeded KGW Raman laser.