High-power narrow-linewidth 1.94mum Tm: YLF (Yttrium Lithium Fluoride) laser

The invention discloses a high-power narrow-linewidth 1.94mum Tm: YLF (Yttrium Lithium Fluoride) laser, relating to a solid laser and aiming at solving the problem that the traditional 1.94mumTm: YLF laser is difficult to realize high-power laser output. The high-power narrow-linewidth 1.94mum Tm: YLF laser comprises a volume grating, Tm: YLF laser crystals, 45-degree 1.94 mum totally-reflecting mirrors, an F-P etalon and a 1.94 mum laser output coupling mirror, wherein four beams of pumping light respectively pass through three 45-degree 1.94 mum totally-reflecting mirrors to enter two Tm: YLF laser crystals; the 45-degree 1.94 mum totally-reflecting mirror I is arranged behind the volume grating; the Tm: YLF laser crystal I is arranged behind the 45-degree 1.94 mum totally-reflecting mirror II; the 45-degree 1.94 mum totally-reflecting mirror II is arranged behind the Tm: YLF laser crystal I; the Tm: YLF laser crystal II is arranged behind the 45-degree 1.94 mum totally-reflecting mirror II; the 45-degree 1.94 mum totally-reflecting mirror III is arranged behind the Tm: YLF laser crystal II; the F-P etalon is arranged behind the 45-degree 1.94 mum totally-reflecting mirror III; and the 1.94 mum laser output coupling mirror is arranged behind the F-P etalon. The high-power narrow-linewidth 1.94mum Tm: YLF laser disclosed by the invention is suitable for providing 1.94 mum Tm: YLF laser with high power and narrow linewidth.