Research on pumping dye laser with 100-watt red solid-state laser

We report a high power and high beam quality tunable dye laser pumped by a high power solid-state red laser. We have developed a diode side pumped intracavity freque1ncy switched Nd:YAG laser in 659.5 nm. A stable cavity structure was designed based on measurement of thermal focal length to solve the influence of thermal effect of gain medium. At the repetition rate of 10 kHz, the maximum output power of 659.5 nm was 101.5 W, and the pulse width was 169.5 ns. In order to pump a certain dye material, red laser was adjusted to 45 W and 100 ns and coupled to a fiber core of 550 μm. Using a Littmann cavity with grazing-incidence grating, a tunable 711.8 nm-752.2 nm laser was obtained. At the repetition rate of 10kHz, the maximum output power of 3.3 W was achieved at 740.8 nm with a linewidth of 2.1pm. The pulse width was 28.2 ns and tunable range was 14.3 nm. The beam quality was measured as Mx² = 1.10 in the horizontal and My² = 1.17 in the vertical direction.